.SYKE.S: MOLLUSCA OF " PORCUPINE " EXPEDITIoyS. 327 



TETHYS, L., 1758. 

 Tethys punctata (Cuvier). 

 Laplysia punctata, Cuvier: Ann. Mus., ii, p. 295. 

 Tethys punctata, Cuvier: Pilsbry, Man. Conch., vol. xvi, p. 70. 

 "Porcupine" Expedition, 1870, Vigo Bay, 20 fathoms. 

 Distribution. — Norway to the Canaries, and Mediterranean. 

 A single immature shell, just over 2 mm. in length. 



TTLODINA, Rafinesque. 



Tylodina Deubenii, Loven. 

 Tylodina Deubenii, Loven: Ind. Moll. Scand., p. 19; Pilsbry, Man. 

 Conch., vol. xvi, p. 187; Jeffreys, Proc Zool. Soc, 1882, 

 p. 673. 

 "Porcupine" Expedition, 1870, Stations 24, 27. 

 Distribution. — Norway, Bergen coast, 150-300 fathoms; near 

 Elsinore, 12-14 fathoms (Jeffreys). 



LIMA.CINA, Cuvier. 

 LiMACiNA BULiMoiDES (D'Orbiguy). 

 Atlanta lulimoides, D'Orbigny : Voy. Amer. Merid., vol. v, p. 179. 

 Limacina bulimoides, D'Orbigny: Pelseneer, "Challenger" Report, 

 Pteropoda, pt. ii, p. 30 ; Locard, Exped. Seient. Trav. 

 Talisman, vol. i, p. 26 ; Tesch, Thecosomata, etc., Siboga 

 Exped., p. 13. 

 "Porcupine" Expedition, 1870, Stations 16, 17, 56. 

 Distribution. — Widely scattered over the Atlantic and Pacific 

 Oceans ; dead shells in the Mediterranean. 



Jeffreys notes, " Roundstone Bay, Connemara (Dr. Alcock)," but 

 he does not mention whether live or dead shells. 



Limacina contorta (Monterosato). 

 Spirialis contorta, Monterosato : Nuova Rev. Conch. Medit., p. 50. 

 "Porcupine" Expedition, 1870, Station 56. 



Distrihition. — Mediterranean. 



Though referred to on various occasions both by the author and 

 others, this minute species seems never to have been desci'ibed or 

 figured. I now give a figure, taken from a specimen in my collection, 

 so that those more competent than I may be able to judge of its 

 validity. It seems nearly related to Z. trochiformis. 



