SCHASICHILA. 43 
SCHASICHILA. 
Schasicheila, Shuttleworth, in Bern Mittheil. 1852, p. 301 (Diagn. no. 3, p. 41). 
Near Helicina, but covered with a thick dark periostracum forming spiral rows of 
membranaceous rays; upper edge of the aperture obliquely cut off; umbilical callus 
small; operculum pointed above and below, the lower point overtopping the edge of 
the aperture. 
Nearly peculiar to Mexico and Central America; only an aberrant species on the 
Bahama Islands. 
Series lacini 
Nomen. ee periostraci, um Forma. Anfr. supp. Diam. Alt. Patria. 
: millim. millim. 
nicoleti, Shutil. .... 3 subangulata. non convexi. 15-17 | 10-124 | E. Mexico. 
pannucea, Morel. ..| parum distincte. ” » 10-12 8-9 | E. Mexico; Gua- 
temala. 
alata, Pfr. ........ 4-5 rotundata. convexi; sutura 10 8-9 E. Mexico. 
profunda. 
1. Schasichila nicoleti. 
Schasicheila nicoleti, Shuttl. in Bern Mittheil. 1852, p. 302 (Diagn. no. 3, p. 42)1; Pfr. Novit. 
Conch. i. p. 89, t. 25. figg. 7-9°; Monogr. Pneum. Vivent. ii. p. 220°. 
Helicina nicoleti, Sow. Thes. Conch. iii. p. 280, t. 267. fig. 67 ; Reeve, Conch. Icon. xix., Helicina, 
t. 13. fig. 109. 
Hab. E. Mexico: Cordova, State of Vera Cruz (Jacot-Guillarmod!*, Sallé*); Cerro 
de Plumas, near Cordova, Jalapa (Hége). 
M. Nicolet, in La Chaux de Fonds, Neufchatel, gave specimens of this shell to 
Shuttleworth in the year 1845. 
2. Schasichila pannucea. 
Helicina pannucea, Morelet, Test. Noviss. i. p. 21 (1849)’; Pfr. Monogr. Pneum. Vivent. i. p. 369, 
footnote*; Sow. Thes. Conch. iii. t. 267. figg. 68, 69°. 
Schasicheila pannucea, Shuttl. in Bern Mittheil. 1852, p. 301 (Diagn. no. 3, p. 41) *. 
Schasichila pannucea, v. Mart. P. Z.S. 1875, p. 649 °. 
Helicina alata (Sow.), Reeve, Conch. Icon. xix., Helicina, t. 13. fig. 107 °. 
Schasicheila alata, H. & A. Adams, Gen. rec. Moll. ii. p. 306, t. 87. figg. 6, 6a (operculum)’ ; 
Tristr. P. Z. 8S. 1863, p. 412°. 
Hab. N. Cuntrat Mexico: Aguas Calientes (£dége). 
E. Mexico: Jalapa (Hége). 
N. Guatemata: San Luis, province of Peten(Morelet 17); Coban, Vera Paz (Salvin ® §); 
Senahu, in the mountains north of the Polochic valley (Champion). 
S. GuatemMaLA: El Reposo 800 feet, above Champerico, Pacific slope (Champion). 
6* 
