84 MOLLUSCA. 
worth’s original specimen, there are very few differences: chiefly the more elevated 
figure of the former [diam. 10, height 8 millim., Binney (1865); diam. 9, height 63 
millim. according to Shuttleworth—Binney’s figure, t. 74. fig. 4, is, therefore, somewhat 
magnified]. I have never seen Binneyan specimens. 
Binney ! and Pfeiffer 4 give “‘ United States (?) ” as the locality. 
14. Helicina tenuis. 
Helicina ambeliana, Sow. Thes. Conch. i. t. 1. fig. 19 (and fig. 26?) (nec Boissy) *. 
Helicina tenuis, Pfr. in P. Z.S. 1848, p. 124? [nec C. B. Adams, Contribut. to Conchol. 1. p. 14 
(1840) *]; Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Helicina, no. 47, p. 40, t. 7. figg. 
38, 34°; Monogr. Pneum. Vivent. i. p. 372*; Gray, Cat. Phaneropn. p. 269°. 
Var. Helicina vernalis, Morelet, Test. Noviss. i. p. 20 (1849)°; Pfr. Monogr. Pneum. Vivent, i. 
p. 8727; Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Helicina, no. 96, p. 71, t. 10. figg. 
12-14°; Gray, Cat. Phaneropn. p. 269°; Sow. Thes. Conch. iii. p. 288, t. 273. fig. 273"; 
v. Mart. P. Z.S. 1875, p. 649”. 
Var. Helicina chiapensis, Pfr. in P. Z. 8. 1856, p. 880"; Monogr. Pneum. Vivent. ii. p. 198 "3 
Sow. Thes. Conch. iii. p. 288, t. 272. figg. 255, 256™. 
Helicina chiappensis (sic), Reeve, Conch. Icon. xix., Helicina, t. 13. fig. 110”. 
Var. Helicina lindeni, Pfr. in P. Z. S. 1848, p. 123"; Martini & Chemnitz, Syst. Conch.-Cab. 
ed. 2, Helicina, no. 67, p. 52, t. 8. figg. 25, 26 (not good)’; Monogr. Pneum. Vivent. i. 
p. 388%; Gray, Cat. Phaneropn. p. 282"; Sow. Thes. Conch. ii. t. 272. figg. 258-260 
(not t. 278. fig. 270, nor t. 278. fig. 409, nor the description) *; Tristr. P.Z.S. 1861, 
p. 2337; Reeve, Conch. Icon. xix., Helicina, t. 18. fig. 112”; Angas, P. Z. 8. 1879, 
p. 484°. 
Hab. Cuntrat Mexico: Sayula in Jalisco, Irapuato near Guanajuato (Hoge). 
E. Mexico: Soledad, between Cordova and Orizaba (banded specimens) (H@ge) ; 
Mexico, without nearer indication of locality 51415 2022 (77. tenuis, var. B; 
Pfeiffer *). 
S.E. Mexico: Chiapas (Ghiesbreght 2 18) (normal and variegated specimens) ; Teapa 
and San Juan Bautista in Tabasco (Hoge, H. H. Smith); Tapinapa (Lin- 
den 16 18 19), 
Yucatan 5 (coll. Cuming *). 
N. Guatemata: Province of Peten’®%, in the woods (Morelet °); dense forests of 
Cubilguitz, valley of the River de la Pasion (Champion); Coban (Salvin 1"): 
San Gerénimo and the neighbouring mountains in Vera Paz (Salvin 21); Panzos, 
Chacoj, and San Juan, all in the valley of the Polochic River, Purula (Cham- 
pion) ; Guatemala 1°. 
S. Guatemata: Totonicapam Mountains 8500 to 10,500 feet (small variety) ; 
El Reposo 800 feet, Las Mercedes 3000 feet, Cerro Zunil 4000 feet, San Isidro 
1600 feet, all on the Pacific slope; Zapote, on the slope of the Volcan de Fuego 
(Champion). 
* This belongs to the genus Trochatella. 
