154 



231. ? Potamitlis, 18 1 Potamitle, Brong. {Geol. Paris, Ann. Mus. 

 xv. t. 22. f. 3). Cerithium, sp. Desk. P. Lamarckii, Brong. 



232. ? Potamidum, Flem. 1828 (Sow. M. C. t. 341. f. 1 & 2). P. 

 acutum. 



233. Cerithium, Adans. 1757 ; Brvg.; Lam. 1822. C.(Popel), Adam. 

 Murex radula. 



Cerithium, Montf. 1810, 511. PJiinoclavis, sp. Swains. 1840, 315. 



Mur. vertagus. 

 Cerithium y, Schmn. 1817. Rhiuoelavis, sp. Swains. 1840, 315. 



Mur. aluco. 

 Cerithium, Lam. 1801, Swains. 1840, 316. Cerithium /3, Schum. 



1817. C. nodulosum, Brug. 



234. Bittium, Leach MSS. 1819. Terebra, sip. Flem. Strombiformis, 

 sp. Da Costa. Nassa, sp. Sag. Mur. reticularis, Mont. 



235. Pirenella. Cerithium, sp. Risso, 182G; Philippi. Pyrena, sp. 

 (nigra), Ch. §' Jans. Cerithium mammillatum, Philippi. 



1 Cerithium, sp. Lam., Sow. Cer. tuberculatum, Sow. 



Cerithium torulosuiu, Brvg., Lam. ii. 27, is only a monstrosity of 

 Cerithium vulgatum. 



236. Cerithidea, Swains. 1840. Potamides, Gray, 1840. Cerithium 

 (sp. 16), Lam. 1822. Turbo, sp. Billw. Murex decollates. 



Cerithium, Flem. 1828. Strombiformis, sp. Da Costa. Strom- 

 bus costatus. 



237. Tympanotomos, Klein, 1753 ; Schum. 1817, 211. Tympanoto- 

 my, Gray, 1840. Potomis, Swains. 1840. Nerita, sp. Midler. 

 Ligula, sp. Humph. 1797. Potamis or Potamides, Sow. Man. 

 236. Murex fuscatus, Linn. 



238. Telescopium, Chemn. ; Montf . 1810, 439; Schum. 1817, 233. 

 Terebralia, sp. Swains. 1840, 315. Cerithium, sp. Brug. Tro- 

 chus Telescopium. 



239. Glottella. Melania armigera, Say. 



240. Pyra/Ais, Montf. 1810, 459. Terebralia, sp. Swains. 1840, 315. 

 Cerithium a, Schum. 1817, 224. C. (potamide), Blainv. 1825. 

 Potamides, Cuvier, 1817. Strombus palustre. 



Triphorina. 



241. Triphoris, Desh. " 1824," 1830. Triphore, Desh. Triphorus, 

 Swains. 1840, 342. Triphora, G. Sow. Triph. plicatus, Desh. 



Tristoma, Blaine, (not Desh. ; see E. M. 1053) ; not Cuvier. Tri- 

 phoris, sp. Desh. Cerith. tristoma, Blainv. 



Bittium, sp. Leach, 1819. Mastonia, sp. Loven. Terebra, sp. 

 Flem. Cerithium, sp. Lam. Mur. adversum, Mo?itag. 



Mastonia, Hinds, 1842. Tri. vulpinus. 



Sychar, Hinds, 1844. Triph. vitreus. 



Ino, Hinds, 1844. Triph. gigas. 



