132 THE VOYAGE OF H.M.S. CHALLENGER. 



of the pillar, and also in front of it on the left corner of the basal mouth lip, is a marked feature. 

 I observe, however, that, as is often the case with these brilliant colours, the crimson has somewhat 

 faded during the years the shell has been in my hands. This may account for its absence in the 

 British Museum specimens. 



Family Neeitacea, Lamarck, 1809. 

 Genus Nerita, Linne, 1758. 



Species. 



1. Nerita albicilla, Linnc. 3. Nerita chamceleon, Linne. 



2. Nerita ascensionis, Gmelin. 4. Nerita punctata, Quoy and Gaimard. 



5. Nerita tessellata, Gmelin. 



1. Nerita albicilla, Linne. (See Appendix, No. 3.) 



2. Nerita ascensionis, Gmelin. 



Nerita ascensionis, Gmelin, p. 3683, No. 55. 



„ „ Chemnitz, Conch. Cab., vol. v. p. 297, pi. cxei. figs. 1956-57. 



„ „ Lamarck, Anim. s. vert., vol. vi. (2) p. 193, and(ed. Desh.), vol. viii. p. 607, No. 11. 



Dillwyn, Cat., vol. ii. p. 1000, No. 50. 

 ,, ., Deshayes, Encyclop. method., vers. vol. iii. p. 618, sp. 6. 



„ „ Quoy and Gaimard, "Astrolabe" ZooL, vol. iii. pi. lxv. figs. 19-22. 



„ Wood, Ind. Test., p. 180, pi. xxxvi. fig. 52. 



,, „ Eeeve, Conch. Icon., vol. ix. pL iii. fig. 14. 



,, „ Sowerby, Thes. Conch., pts. 39 and 40, p. 116, sp. 64, (iv. Gen.) pL cccclxvi. fig. 72. 



September 1, 1873. St Michael's Eock, Fernando-Noronha, shore. 



Habitat. — Island of Ascension. 



This is Nerita diversicolor, Martyn fide Morch, and Nerita chlorostoma, Lamarck fide 

 Recluz (see Hanley in Wood's Index, loc. cit. supra). 



3. Nerita chameleon, Linne. (See Appendix, No. 4.) 



4. Nerita punctata, Quoy and Gaimard. 



Nerita punctata, Quoy and Gaimard, "Astrolabe" (Zool.), vol. iii. p. 185, pi. lxv. figs. 41, 42. 

 ,, afrata, Eeeve, Conch. Icon., vol. ix. pi. iv. fig. 16. 



„ Hutton, Marine Moll. New Zealand, p. 33, No. 138. 

 „ „ Hutton, Manual New Zealand Moll., p. 89. 



„ punctata ? v. Martens, Crit. List MolL New Zealand, p. 29. 

 „ atrata, Angas, South Australian Moll., Proc. Zool. Soc. Lond., 1865, p. 175, No. 123. 



„ Angas, Port Jackson Moll., Proc. Zool. Soc. Lond., 1867, p. 212, No. 165. 

 „ „ Sowerby, Thes. Conch., pts. 39 and 40, p. 110, sp. 31, pi. cccclxv. (iii. Gen.) fig. 41. 



„ punctata, v. Martens, Moll. Mauritius, &c, p. 291. 

 „ melanotragus, E. A. Smith, " Alert " Collections, p. 69, No. 82. 



April 17-18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 



