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 A HISTORY OF CORNWALL NEMERTINI The Nemertean worms have only received intermittent attention at Truro, so that the list gives a very inadequate idea of the distribution of many of the species. A systematic account has been kept of those found during dredging excursions in Falmouth Bay, but from Polperro, Mevagissey and Gorran the records are fragmentary. Littoral species only have been obtained from Mount's Bay, and Scilly is represented by a few specimens picked up casually during the summer of 1903. The list is based on that published for the Plymouth district by Mr. J. H. Riches in the Journ. Marine Biol. Assoc. vol. iii, and the nomenclature followed is chiefly that of Bilrger in Nemertinen des Golfes von Neapo/, 1895. 1. Carinella finearis, Mont. Two specs. Duke Rk. 1892 (M.B.A.) ; one near Looe (Marryat) 2. C. polymorpha, Renier. One spec, half-way be- tween Rame and Eddystone ; one 4 m. W. of the Eddystone (M.B.A.) 3. C. superba. Drake's Is., Rame to Eddystone and Eddystone Gnds. (M.B.A.) ; 20 fm. Fal- mouth B. ! 4. C. attnulata, Mont. Asia shoal and Queen's Gnd., 6 m. SW. of Rame, Eddystone Gnds. (M.B.A.) ; 1 5 fm. off Polperro ! off Meva- gissey ! One small but typical spec, under a stone at l.w-m. Gyllyngvase beach, Falmouth, August, 1905 ! 5. Cephahthrix bloculata, Oersted. C. between t-m. about Plymouth (M.B.A.) ; Polperro, Meva- gissey, and Falmouth in sand and mud ! Marazion and Mousehole ! 6. C. Knearii, Rathke. A few in deepish water outside Plymouth Breakwater, but chiefly between t-m. in Rum B. (M.B.A.) ; 4 from sand between t-m. near Gorran Haven ! several near Swanpool, Falmouth (Thomas) ; 2 from Marazion ! 7. Eunemertes gracifis, Johnst. About Plymouth Breakwater and Drake's Is. (M.B.A.) ! among roots of Laminaria, Mevagissey and Falmouth ! Mount's B. ! 8. Nemertes neesi, Oersted. Abund. Plymouth Break- water ; found on the Bridge and Drake's Is. (M.B.A.) 9. Nemertopsis flavida, Mclntosh. C. in Plymouth S. (M.B.A.) ; occ. found between t-m. at Fal- mouth, Helford, Mount's B. and Sennen ! 10. Ampipom pulcher. Taken once or twice on the Eddystone Gnds. (M.B.A.) 11. A. lactiflorus, Johnst. Under stones and sea-weed between t-m. ; c. Drake's Is. and Mt. Edg- cumbe (M.B.A.) ; Looe (Marryat) ; Meva- gissey, Gorran Haven, Falmouth, and Helford ! 1. s. t. Marazion ! Sennen Cove 12. A. dissimulans, Riches. Abund. Millbay Chan. Once between t-m. Drake's Is. ; dredged Asia shoal (M.B.A.) ; Falmouth Harb. 10 fm. ! 13. Depranophorus spectabilis, Quatrefages. Queen's Gnd., Cawsand B., Eddystone Gnds. (M.B.A.) ; Falmouth B. in an eroded stone from 25 fm. ! 14. Tetrasterrma candidum, Mull. The type and various forms or species closely allied to it c. in Plymouth S. and Falmouth Harb. and B., and 1 6. 18. 19. 20. 21, 23' 24. 25. 26. occ. found between t-m. and in Zostcra, as at Fowey, Mount's B. and Tresco Flats, Scilly ! Tetrastemma cephahphorum, Bilrger. Dredged Queen's Gnd., Drake's Rk. and elsewhere in Plymouth S. (M.B.A.) Oerstedia dorsalis, Zool. Dan. V.c. in dredgings from Cawsand B., Queen's Gnd., Asia shoal, 5 m. S. of Penlee Pt., Eddystone Gnds. (M.B.A.) ; in 30 fm. off Polperro, in 1 2 fm. off Pennance ! abund. in Zostera in spring of 1904 at Fal- mouth ! O. nigra, Riches. On Codium and other weeds from the laminarian zone in Plymouth S. (M.B.A.) ; on Codium between Gyllyngvase and Swanpool, Falmouth ! Scilly ! O. immutabilis, Riches. Among weeds on the shore and dredged at Duke Rk., Plymouth S. (M.B.A.) ; 2 specs, dredged off Polperro ! Malacobdella grossa, Mull. A single example occurs in the branchial cavity of almost every spec, of Cyprina islandica taken around Ply- mouth, Polperro, and Falmouth Eupolia curta, Hubrecht. Eddystone Gnds. and 2 m. W. of Eddystone ; one small spec. Queen's Gnd. (M.B.A.) Lineus longissimus, Gunn. Occ. specs, dredged and found on the shore in all parts of Plymouth S., largest 6 ft., the majority much less ; Eddy- stone Gnds. (M.B.A.) ; n. unc. along S. coast under stones at 1. w. One on Pentewan beach July, 1905, over 20 ft. long and only ^ in. thick ; one at Tresco Scilly among weed on a barge, several specs. St. Mary's ! L. gesserensis, Mull. Apparently c. under stones between t-m. all along S. coast : v.c. in Fal- mouth district L. lacteus, Grube. Between t-m. on N. of Drake's Is., and occ. in Cawsand B. (M.B.A.) L. bilineatus, Mclntosh. Dredged on all stony ground in Plymouth S., the Eddystone Gnds., and m. S.W. of Penlee Pt. (M.B.A.) ; n. unc. near Mevagissey and locally in Falmouth B. ! Micrura fasciolata, Ehrenberg. Dredged from stony ground in all parts of Plymouth S., on the Rame-Eddystone and Eddystone Gnds. (M.B.A.) ; Gorran Haven, and n. unc. in Falmouth B. and Helford ! M. purpurea, Dalyell. In dredgings from stony ground Plymouth S. and on the Eddystone Gnds. (M.B.A.) ; Polperro ! Helford in 10 to 1 5 fm. ! 130