78 DKTM.1 1-, MI.XK O AND CENTRAL AMERICA. 



distinguished by the more rounded last whorl and ;i rounded aperture; 

 I suspect this is a whitish specimen of O. sulphureiis, var. b. 



" The specimens of 0. rirt/t mi/is examined by .St rebel, Beitr. Mex. 

 Land- mill Siisswasser-Conch. v, pp. 88, 89, were from Caracas." 



Dr. von Martens notes the following variations: 



b. Whitish. (Fisch. & Crosse, 1. c, p. 49G. pi. 23, f. 8). Jalapa 

 (Iloj_'e); Teapa, in Taliasco (H. H. Smith) ; Northern Guatemala 

 at San Luis de Peten (Morelet), and Coban ( Bocourt, Salvin). 



c. Var. gnu-Hint: PI. 4, fig. Go. Length 28-29, diam. 11-12, 

 aperture 11-13 mill. (F. & C., 1. c. p. 49G, pi. 23, fig. 8a ; Strebel, 

 1. c., p. 88, pi. G, fig. ;').) 



N. Guatemala: Senalm (Champion). IF. Guatemala; RetaUmlen 

 (Stoll). 8. IF. Guatemala: San Agnstin (Bocourt); Zapote, on the 

 slope of the Volcan de Fuego (Champion). Nicaragua: La Liber- 

 tad (Bell). 



" Our var. c, gracilior, is very near O.flavidiis Menke [see vol. xi, 

 p. 310, pi. 26, figs. 71-73; Ferussac, pi. 142 B. fig. 14; Reeve, 

 Conch. Icon, v, Jinlimus, pi. 45, fig. 287 (liliaceus)]; but I have not 

 yet seen a specimen from Mexico or Central America with the deli- 

 cate rosy hue on the lower half of the last whorl, which is so charac- 

 teristic of this species." 



d. Var. citroneUus: Angas (pi. 4, fig. G7), subconic, bright yellow, 

 the suture white. Length 27, diam. 13, aperture 12 mill. (Jinfi- 

 mus citroneUus Angas, P. Z. 8., 1879, p. 479, pi. 40, fig. .">). 



N.-E. ('osttt Rica: Puerto Viejo on the Rio Sarapiqui (Biolley). 

 Central Costa Rica : San Jose, and La Uruca near San Jose (Biolley ); 

 Alajiii'lu at an el.-vation of 900 to 1000 metres above the Sea (Orosco); 

 Suralres, alt. GOO metres, near San Mateo (Biolley). S. W. Costa 

 Rica: Borneo, alt. 450 metres (Pittier); Alto de Mano Tiare, 690 

 metres (Pittier). 5. E. Costa Rica: between Urea ami Lijioria, on 

 the low hills (Gabb). 



e. Var. obesus Mart. (pi. 4, fig. G8). Subconic, shorter, uniform 

 whitish. Long. 2G, diam. 14, apert. 13 mill. 



A'. M,'si<;> : Hn<itusco,\n the State of Vera Cruz (Ilille, in Dun- 

 ker's collection). 



D. MOHICANDI (Pfeiffer). PI. 4, figs. 62, 63, 64. 



Shell perforate, ovate-conic, thin, engraved with subcontinuous 

 spiral lines; subdiaplianous, citron-colored. Spire conic, rather 



