28 MOLLUSCA. 
HELICINA. 
Helicina, Lamarck, Prodr. p. 76 (1779). 
I. Carinate. 
1. Helicina ghiesbreghti. 
Helicina ghiesbreghti, Pfr. P.Z.S. 1856, p. 381°; Monogr. Pneum. Vivent. li, p. 215°; Sow. 
Thes. Conch. iii. p. 293, t. 277. fig. 432°. 
Helicina ghiesbrighti, Reeve, Conch. Icon. xix., Helicina, t. 27. fig. 242 *. 
Hab. C. Mexico: Irapuato, near Guanajuato (Hoge). 
S. Mexico: Chiapas 3 4 ( Ghiesbreght 1). 
S. Guatemata: El Reposo 8000 feet (Champion); San Francisco Miramar, Costa Cuca, 
Pacific slope, 2500 feet (Stol/). 
2. Helicina amena. 
Helicina amena, Pfr. P. Z.S. 1845, p. 119"; Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, 
Helicina, no. 73, p. 55, t. 8. figg. 18-15*; Monogr. Pneum. Vivent. 1. p. 886°; Gray, Cat. 
Phaneropn. p. 281‘; Tristr. P. Z.S. 1861, p. 283°; Sow. Thes. Conch. ii. p. 292, t. 276. 
fig. 383°; v. Mart. P.Z.S. 1875, p. 649°; Reeve, Conch. Icon, xix., Helicina, t. 20. 
fig. 177°. 
Helicina purpureo-flava, Morelet, Test. Noviss. i. p. 19 (1849) °. 
Hab. Yucatan: Campeche (coll. Albers, ex mus. Heidelbergenst). 
N. GuatemaLA: Provinces of Peten and Vera Paz (Morelet? 4°); Coban, Vera Paz 
(Salvin 57); San Juan, Sabo 2800 feet, Chacoj, and Panzos, all in the valley of 
the Polochic River (Champion); Teleman in the same valley, ascending plants 
(Stol/). 
Honpuras 2° 4 (mus. Cuming 1), Honduras Bay © ®. 
Var. a: minor (diam. 12, alt. 84 millim.), pallide flava. 
Hab. Nicaracva (Janson). 
Var. b: depressa (diam. 13, alt. 73 millim.). 
Hab. S. Panama: Bugaba, W. of David (Champion). 
Somewhat variable in colour; the rose-colour often prevails on the upper whorls, 
but is absent in several examples. The obtuse keel is often white; in other specimens 
of the same colour as the rest of the last whorl. Young examples are sometimes 
covered by a dirty coat of apparently foreign matter. 
3. Helicina sowerbyana. 
Helicina sowerbiana, Pfr. P. Z.S. 1848, p. 124°. | 
Helicina sowerbyana, Pfr. in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Helicina, no. 65, p. 50, 
