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 MARINE ZOOLOGY 49- 50. 53. 54 CircinaRum concrescens, Giard. Drake's Is., on reef leading to the Bridge, on roots of Laminaria at extreme l.w. (M.B.A.) Leptoclinum durum, Milne-Ed. Several small colonies conspicuous by their yellow colour on laminarian roots at Sennen ! L. maculosum, Milne-Ed. C. on laminarian roots in shallow water at Scilly ! L asperum, Milne-Ed. N. unc. on roots of Laminaria and Cystoseira ericoides, Falmouth (Cocks) L aureum, Milne-Ed. N. unc. after heavy weather about Falmouth (Cocks) L. gelatinosum, Milne-Ed. N. unc. on stones and laminarian roots at l.w-m., Falmouth B. (Cocks) L. listerianum, Milne-Ed. N. unc. Falmouth B. on fronds and stem of Fucui serratus, Cysto- seira ericoldes, &c. (Cocks) Polycyclus savignyi, Herdman. Several specs, of a non-encrusting Polycyclus with test of a dark dingy blue in 1901 in 20 fin. Falmouth B., feebly attached to various sea-weeds. They had 8 large and 8 small tentacles, and the terminal bulbs in the test showed up as con- spicuous brown dots ! Botryllus smaragdus, Milne-Ed. N. unc. Selley's beach and Gyllyngvase, Falmouth (Cocks) ; a green Botryllus at Polperro, Fowey and Fal- mouth is probably this species B. violaceus, Milne-Ed. C. on rocks, under stones and on weed at 1. w. shores ot Plymouth district (M.B.A.) ; plentiful Polperro ! and Falmouth ; Sennen Cove, on Fucus ! 59. B. schhssen, Pallas. On rocks, stones, and sea- weeds in Falmouth B. and Harb. (Cocks) 56. 57 58. 60. B. gemmeus, Sav. In Falmouth Harb. on Fucus serratus (Cock;) 61. Botryllus rubens, A. & H. N. unc. attached to stones, Falmouth (Cocks) 62. B. virescens, A. & H. N. unc. on stones and Laminaria about Falmouth (Cocks) 63. B. blvlttatus, Milne-Ed. On stones and fuel about Falmouth (Cocks) ; Falmouth (Alder) 64. Botrylloides rubrum, Milne-Ed. C. below stones under the Hoe (M.B.A.) ; Falmouth B. on young fronds of Fucus serratus, r. (Cocks); c. Falmouth (Alder) 65. B. rotifera, Milne-Ed. N. unc. Falmouth B. under stones and on stems of young Fucus serratus (Cocks) 66. B. clavelina, Giard. Crow S., Scilly, 1903 ! 67. Doliolum nationalis, Borgert. Plymouth district plentiful in tow-nettings, Aug. and Sept. 1893, and abund. in 1895 ; several specs. S. of the Eddystone Nov. 1904 (M.B.A.) 68. Salpa fusiformis, Cuvier. Aggregated form at the surface, north of the Eddystone, Aug. 1901 (M.B.A.) 69. S. mucronata, Forskal. Large shoals, Plymouth S. in 1893, from about 15 June to 7 July (M.B.A.) 70. Olkopkura dioica, Fol. Gen. present in tow- nettings in Plymouth district, Falmouth B. and Scilly ; occ. abund. 71. O.fabellum, ]. Mull. Abund. in tow-nettings, Scilly, July, 1903 ! 7z. Fritillaria boreaRs, H. Lohmann. Plymouth, March, Oct. and Nov. 1899, Eddystone, Aug. 1903 (M.B.A.) 159