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 CRUSTACEANS Polperro, whence Mr. Loughrin, or Laughrin, sent it to Norman : and Spence Bate. 2 Cocks obtained it from 'trawl refuse, rare.' In the Metopidae the species which Bate described as Montagua pollexiana, and of which he says, ' I have had this species dredged off the north coast of Cornwall, near St. Ives,' 3 is identified by Norman with the earlier Metopa norvegica (Liljeborg). Montagua monoculoides (Montagu) ' from Falmouth, Penzance, and Plymouth,' 4 and M. marina, Bate, found ' in the refuse of the trawlers, off the Eddystone,' 5 now stand in the genus Stenothoe (Dana), of the family Stenothoidae. Another small species, Danata dubia, Bate, also ' taken in trawl refuse, off the Eddystone,' 6 has been transferred to Boeck's genus Cressa, of the family Cressidae. In the Oedicerotidae Perioculodes longimanus (Bate and Westwood) 7 has been taken off the Scilly Islands by D. Robertson and G. S. Brady. 8 In this species the head is girdled by a pair of eyes in which the lenses are brilliantly iridescent, and their pigment is bright scarlet. Westwoodilla caecu/a, in which the eyes are much less conspicuous, ' was procured from trawl refuse which had been taken near the Eddystone Lighthouse.' 9 W. kya/ina, Bate, is, no doubt, as Bate himself suggests, the same species. There is not sufficient reason for adopting the later generic name Halimedon in place of Westwoodilla, nor is the specific name catcu/a, meaning ' a little blind,' at all inappropriate to this apparently dim-eyed creature. Monoculodes carlnatw, Bate, has a fractional claim to be reckoned in the Cornish fauna, since Norman determines that M. stimpsoni, Bate, is the young male of this species, and Bate tells us that ' a mutilated portion ' of M. stimpsoni was ' taken in the Channel off the west of Cornwall.' 10 Epimeria cornigera (J. C. Fabricius), of the family now named Paramphithoidae, is recorded by Bate and Westwood under the name of Acanthonotus owenii, Bate. They say, ' Mr. Webster has dredged it at Falmouth.' n The remarks upon it which Bate makes in his ' Revision ' of Couch's Fauna 13 are clearly out of place, and will be noticed under Isaea montagui, to which they properly apply. In the Lafystiidae, the little white parasitical Lafystius sturionis, Kroyer, obtained by Laughrin from fish at Polperro, is recorded by Bate under the name ofDarivinia compressa. To the Acanthonotozom- atidae belongs Iphimedia obesa, H. Rathke, ' dredged near Drake's Island, in Plymouth Sound.' u The family Liljeborgiidae is represented by Liljeborgia pallida. Bate, from Plymouth Sound. 15 The Calliopiidae, a family of numerous genera, comprises Apherusa cirrus (Bate), of which Bate, who wrongly identifies it with KrSyer's Ampbithoe bicuspis, says, ' We have had specimens taken at Fal- mouth.' 1G Here also stands Apherusa bispinosa (Bate). Bate, in his ' Revision,' naming it Atylus bispissosus, says, ' We have dredged this species on the sandy bottom in Whitsand Bay, not far from the Rame Head, and have had it sent to us from Falmouth.' 17 To the Atylidae belongs Nototropis swammerdamei (Milne-Edwards), formerly included in the genus Atylus. Of this species Bate says, ' We have taken it in Plymouth Sound, and Mr. Loughrin has sent it to us from Polperro.' 18 The Dexaminidae, in which the mandibles are without a palp, are represented by Dexamine spinosa (Montagu), ' occurring all round our coasts," 19 and obtained by Cocks from ' fishing boats, trawl refuse, etc. ; not uncommon.' The Gammaridae, of all the families most copious in genera and species, supply to Cornish waters Gammarellus homari (J. C. Fabricius), of which Bate, calling it Amathllla sabini (Leach), says that ' on the south coast of Cornwall it appears to have reached its minimum size, as it has not been recorded further south. It will be found in rocky pools near low-water mark occasionally every- where.' * Grayia imbrtcata, Bate, ' taken in Falmouth Harbour,' 21 is no doubt the young of the preceding species, as long ago suggested by Norman. The genus Melita (Leach) affords us three species, 22 M. palmata (Montagu), obtained at Polperro by Laughrin and by Norman ; 23 M . obtusata (Montagu), of which Bate's M. proximo is a synonym, from Plymouth Sound ; and M. gladiosa, Bate, both from that locality and from Falmouth. 24 The rose-tinted Maera grossimana (Montagu) is reported by Bate from Plymouth Sound, Penzance, and Polperro, by Cocks from ' Gwyllyn-vase, Swanpool, etc. ; not uncommon,' and by Norman also from Falmouth. 25 To his genus Megamoera Bate refers four species. The first, M. semiserrata, Bate, was transferred to Maera by Norman in i869. 26 Of M. longimanus (W. Thompson), Bate says, 'In Cornwall we only know it from Penzance, and there it was taken under St. Michael's Mount.' Of M. othonis (Milne-Edwards) he remarks, 'We have dredged this species in Plymouth Sound, and Mr. Laughrin has sent it to us from Polperro, but it has not been taken anywhere else in the British Isles.' The last statement was inaccurate, 1 Ann. Nat. Hist. Ser. 7, vol. vi, 46. * ' Revision,' p. 52. 3 Ibid. p. 45. Ibid. p. 48. b Ibid. p. 44. 6 Ibid. p. 45. ' Brit. Sen. Crust, vol. ii, 507. 8 Norman, Ann. Nat. Hist. Ser. 6, vol. iii, 452. 9 ' Revision,' p. 47. 10 Ibid. p. 50. " Brit. Sess. Crust, vol. i, 234. 12 Op. cit. 47. 13 Ibid. p. 49. " Ibid. p. 48. Ibid. p. 48. "Ibid. p. 51- " Ibid. p. 51. '" Ibid. p. 51. 19 Ibid. p. 50. *> Ibid. p. 54. Ibid. p. 47. 12 Ibid. p. 53. " 3 Ann. Nat. Hist. (1889), Ser. 6, vol. iv, 132. " Ibid. p. 135. *> Ibid. p. 135. 26 Ibid. p. 127. 279