44 MOLLUSCA. 
3. Schasichila alata. 
Helicina alata (Menke), Pfr. in Zeitschr. f. Malak. 1848, p. 87 1. Martini & Chemnitz, Syst. Conch.- 
Cab. ed. 2, Helicina, no. 54, p. 43, t. 5. figg. 18-207; Monogr. Pneum. Vivent. i. p. 368 °, 
ii. p. 221‘; Gray, Cat. Phaneropn. p. 267°; Sow. Thes. Conch. t. 267. figg. 65, 66 *. 
Schasicheila alata, Shuttl. in Bern Mittheil. 1852, p. 301 (Diagn. no. 8, p. 41) *. 
Helicina (Schasicheila) alata, v. Mart. in Malak. Blatt. xii. p. 10 (1865) °. 
Schasichila alata, Strebel, Abhandl. Geb. Naturw. Ver. Hamb. vi. 1, p. 23, t. 4. fig. 7 - 
Helicina pannucea, Reeve, Conch, Icon. xix., Helicina, t. 13. fig. 108 (nec Morelet) *. 
Hab. E. Mexico: Mexico (Menke 134°); Cordova, State of Vera Cruz (Sallé**, Hoge) ; 
Vera Cruz (Friedel 8) ; Mirador and San Cristobal near Orizaba (Strebel); Atoyac 
(H. H. Smith); Jalapa (Hége). 
PROSERPINA. 
Procerpena, Gray, Syn. Brit. Mus. 1840, p. 90. 
Proserpina, Gray, Syn. Brit. Mus. ed. 1842, p. 90; Pfeiffer, Monogr. Helic. Vivent. i. p. 18. 
Shell depressed, with basal callus as in Helicina ; peristome simple, inner margin 
ending in a plait; revolving lamelle inside the aperture. No operculum. 
Subgen. Ceres: Superne sculpturata, carinata ; faux utrinque trilamellata. 
| 
Nomen. Spira. Coloratio. Sculptura supera. Diam. maj. Alt. | Patria. 
millim, | millim. | 
eolina, Ducl. ....| subplana. pallide aurantia, cuti- | rugulis confertis, antror-| 23-24 9 10 | E. Mexico. 
cula albescente. sum descendentibus. | 
salleana, Gray ..| conoidea. ” striis aperture parallelis, | 22-23 12 | E. Mexico. 
subgranulosis. 
Subg. Prosrrprnetta: Utrinque polita, non carinata; lamella 1 parietali. 
| 
cula. 
| 
berendti, Bland...| convexius- alba. | ad suturam plicatula. 3 13 E. Mexico. 
The whole genus confined to the islands and shores of the Caribbean Sea and 
Mexican Gulf; the two subgenera peculiar to E. Mexico. 
Subgenus Ceres, Gray. 
Ceres, Gray, P.Z.S. 1856, p. 102. 
1. Proserpina (Ceres) eolina. 
Carocolla eolina, Duclos, in Guérin’s Mag. Zool. 1833 (dated 1834), Class V. t. 30* (copied in 
Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Helix, ii. p. 11, t. 100. fig. 10). 
Odontostoma (Carocolla) eolinum, Pfr. Monogr. Helic. Vivent. i. p. 117. 
