1883. THE ' Triton' expedition, 393 



4. Leda lucida, Lov. 



5. Area jpectmiculdides, Sc. ; var. septentrionalis. 



6. Nucula tumidula, Malm. 



7. Dacrydium vitreum, Tor. 



8. Dentalium striolatum, Stimpson. 



9. Puncturella noachina, L. 



10. Ganesa nitidiuscida, Jeffr. 



11. Trochus ottoi. Ph. 



12. Cithna tenella, Jeffr. 



13. Aporrhdis serresianus, Mich. 



14. Natica grcenlandica. Beck ; var. contracta. 



15. Natica montacuti, Forh. 



16. Trophon carinntus, Jeffr., sp. n. 



17. Fusus herniciensis, King. 



18. Columhella haliceeti, Jeffr. 

 /}.>„! 9. Befmncia formosa, Jeffr., sp. n. 

 /ji 20. Pleurotoma exiffua, Jeffr., sp. n. 



21. Cylichna alba, Brown. 



22. Cylichna ovata, Jeffr., = ? conuldides, S. V. Wood. 



23. Cryptaxis crebripunctatus, Jeffr., n. sp. 



24. Scaphander puncto-striatus, Mighels and Adams. 



All except No. 21 and the new species have an extensive range 

 in the North Atlantic. 



The species of MoUusca procured during the cruise of the ' Triton ' 

 were 62. 



For the geographical distribution, synonymy, and other remarks 

 with respect to the above-named species, I would refer to my work 

 on ' British Conchology,' my " Report of the 'Valorous' Expedition " 

 and account of the Mollusca in the ' Proceedings ' of the Royal Society 

 for 1876 and the 'Annals and Magazine of Natural History' for 

 1876 and 1877, and to my papers on the Mollusca from the ' Light- 

 ning ' and ' Porcuj)ine ' Expeditions in the ' Proceedings ' of the 

 Zoological Society for 1878, 1879, 1881, 1882, and 1883, as well as 

 in other publications. 



Descriptions and figures of some of the species, particularly those 

 which are new to science, are subjoined. 



/3,^1. CoccuLiNA spiNiGERA^ Jeffreys. (Plate XLIV. figs. 1, 1 a, 

 1 6, 1 c.) 



Shell oval, convex, rather thin, semitransparent, somewhat 

 glossy, especially on the upper part, where the spines have disap- 

 peared : sculpture, extremely numerous and delicate striee which 

 radiate towards the margin ; these striee are crested by rows of minute 

 tubercles, each of which supports a fine short hair-like spine or 

 prickle ; the spines are easily removed, and disappear when the shell 

 is subjected to the action of potash-water, showing that they are of 

 a chitinous nature ; the apex is quite smooth : colour white : beak 

 very small, incurved and twisted downwards, forming a single whorl ; 

 it is persistent, but sometimes broken or injured by attrition; its 



' Prickly. 



