578 MOLLUSCA. 
we must also include in this subgenus some forms with thick solid shells, which approach 
the typical ones more or less in colour and general aspect. | 
Atlantic coast: L. angulifera, Lam., L. nebulosa, Lam., L. columellaris, dOrb. 
Pacific coast: L. pulchra, Sow., L. fasciata, Gray, L. varia, Sow., the last-mentioned. 
differing by a stronger sculpture. . 
IlJ. Mevarnarne *, Megerle [in Menke’s Syn. Moll. ed. 1, p. 23 (1828), Jan [Conspect. Test. 
Coll. p. 7 (1830)], P. Carpenter [Cat. Mazatlan Shells, p. 346 (1857) ].—Shell of small 
size, with spiral strie, mostly white, with a broad bluish or greyish zone in the middle of 
the last whorl, often variegated with brown oblique or zigzag streaks. Aperture scarcely 
oblique, distinctly angulated above, inside dark brown, usually with two white spiral bands, 
the upper of which is often rather indistinct. 
Atlantic coast: ZL. ziczac, Chemn., L. lineata, d’Orb. 
Pacific coast: L. philippii, P. Carp. (with its varieties), L. conspersa, Phil., L. aspera, 
Phil., the last-mentioned differing by a stronger sculpture. 
I. Cencuritis, v. Mart. 
i. Littorina muricata. 
Buccinum sublividum striis nodosis, &c., Lister, Hist. Conch. t. 30. fig. 28 (1685) (among the 
terrestrial shells)’; Petiver, Gazophylacium, t. 70. fig. 11 (1711) ’. 
Turbo muricatus, Linn. Syst. Nat. ed. 10, p. 761 (1758) *, ed. 13, by Gmelin, p. 3589*; Chemnitz, 
Syst. Conch.-Cab. v. p. 170, t. 177. figg. 1752, 1753° ; Lamarck, Hist. Nat. des Anim. sans 
Vert. éd. 1, vii. p. 47°; éd. 2, par Deshayes, ix. p. 199’. 
Littorina muricata, Férussac, Tabl. Syst. pp. ix, xi (1821-22)°; d’Orbigny, in Sagra’s Hist. fis. 
polit. y nat. de Cuba, Mol. i. p. 111, t. 14. figg. 9, 10°; Philippi, Abbild. neuer Conch. ii. 
p- 142, t. 2. figg. 16, 17°; Reeve, Conch. Icon. x., Litorina, t. 2. fig. 11**; Morch, in 
Malak. Blatt. xxiii. p. 134 (1876) *; Weinkauff, in Martini & Chemnitz’s Syst. Conch.-Cab. 
ed. 2, Litorina, p. 44, t. 5. figg. 7,8”. . 
Tectus muricata, Troschel, Gebiss der Schnecken, i. p. 136, t. 11. fig. 7 (radula) ™. 
Tectarius muricatus, Tryon, Manual of Conch. ix. p. 258, t. 48. fig. 68 (copied from Reeve) "’. 
For the characters of the species, see above under the subgenus Cenchritis, p. 575. 
Hab. S.E. Mexico: Santa Ana (Caspersen }°). 
Honpuras (feeve 1"). 
E. Costa Rica: Puerto Limon (Nepperschmidt, 1894, Mus. Hamburg.). 
A well-known West-Indian shell, occurring in Cuba (Pfeiffer, d’ Orbigny 9, Gundlach), 
Jamaica (Lister !), Haiti (Verkriizen), Puerto Rico (Sintenis, in Mus. Berol.), 
Vieque (Riise '*), St. Thomas (Arebs !*), St. Croix (Ersted 12), Guadaloupe 
(Beau), Martinique (de Candé°), St. Lucia (d’Orbigny ®). Also known from 
Cartagena, Colombia, and from Puerto Cabello, Venezuela (Dunker, in Mus. 
Berol.). | | 
Dr. Pfeiffer has observed this species alive at the upper limit of the breakers, quite 
_ * This name signifies “black suture,” and refers to the fact that in some species the blue median zone 
appears on the upper whorls as a dark band immediately aboye the suture, 
