226 MOLLUSCA..’ 
drainage into the Rio de la Pasion (Champion); Chiacam, near Lanquin, on the 
Cahabon River (Champion); Coban (Sarg7); San Joaquin, below San Cristobal, 
in the valley of Rio Chisoy (Champion); Chacoj and Senahu, Polochic Valley 
(Champion) ; Panzos in the same valley (Conradt and Godman). 
Nicaraaua: La Libertad (Belt). 
b. albidus. 
Bulimulus (Drymeus) liliaceus, Fisch. & Crosse, loc. cit. p. 496 (part.), t. 23. fig. 8°. 
Hab. E. Mexico: Jalapa (Hoge). 
S.E. Mexico: Teapa in Tabasco (H. H. Smith). 
Mexico, without nearer indication (Cuming, in coll. Albers). 
N. GuateMaLa: San Luis de Peten (Morelet 8); Coban (Bocourt ®, Salvin). 
c. gracilior : long. 28-29, diam. 10-12, apert. 11-13 millim. (Fig. 14.) 
Bulimulus (Drymeus) liliaceus, var. B, Fisch. & Crosse, loc. cit. p. 496, t. 23. fig. 8a’. 
Bulimulus sulphureus, form B, Strebel, loc. cit. p. 88, t. 6. fig. 5°. 
Hab. N. Guatemata: Senahu (Champion). 
W. GuatemaLa: Retalhuleu (Stol/). 
S.W. GuatemMaLa: San Agustin (Bocourt °); Zapote, on the slope of the Volcan de 
Fuego (Champion). 
Nicaragua: La Libertad (Belt). 
d. citronellus: subconicus, lete flavus, sutura alba. Long. 27, diam. 13, apert. 12 millim. (Figg. 16, 17.) 
Bulimus citronellus, Angas, P.Z. 8. 1879, p. 479, t. 40. fig. 5”. 
_Hab. N.E. Costa Rica: Puerto Viejo on the Rio Sarapiqui (Biolley). 
CrntraL Costa Rica: San José, and La Uruca near San José (Biolley); Alajuela 
at an elevation of 900 to 1000 metres above the sea (Orosco); Suralres, alt. 600 
metres, near San Mateo (Biolley). 
S.W. Costa Rica: Boruca, alt. 450 metres (Pittier); Alto de Mano Tigre, 690 
metres (Pittier). 
S.E. Costa Rica: between Urea and Liporia, on the low hills (Gadd "). 
Costa Rica, without nearer indication of locality (Carmiol). 
e. obesus : subconicus, brevior, albidus, unicolor. Long. 26, diam. 14, apert. 13 millim. (Fig. 18.) 
Hab. E. Muxico: Huatusco, in the State of Vera Cruz (Hille, in Dunker’s collection). 
Animal greenish (Berendt®). Animal of var. citronellus white ; tentacles very long: 
arboreal (Gabb 11). HH. Pittier found the same variety under the bark of a dead tree. 
This species has been confounded sometimes with the white 0. (Helix) liliaceus of 
Férussac, Prodrome général, no. 401 (1821-22) (Pfr. Monogr. Helic. Vivent. ii. p. 203; 
Deshayes, in Férussac’s Hist. Nat. Moll. Terr. ii. 2, p. 83), from Porto Rico: according 
to the specimens collected by Herr Gundlach at Quebradillas and elsewhere in this 
island, O. liliaceus differs from O. sulfureus not only in its pure white, somewhat creta- 
