OTOSTOMUS. 231 
Lye. N. York, x. p. 805 (jaw and radula)"; Fisch. & Crosse, Miss. Scient. Mex., Mollusca, 
1. p. 500, t. 23. fig. 5°; O. Stoll, Guatem, Reisen, p. 33™. 
Hab. N..Guaremata: Panzos (Conradt). 
CENTRAL GUATEMALA: San Gerdnimo, near Salama (Champion) ; vicinity of Guate- 
mala City (Stod 1%), 
GUATEMALA, without nearer indication of locality (Morelet 12, Sallé 2, Sarg 12). 
Cenrrat Costa Rica: San José (Pittier); La Uruca, near San José, at an elevation 
of 100 metres above the sea, under dry leaves (Biolley); Alajuela (Orosco). 
S. Panama: Isla del Rey (San Miguel) in the Pearl Islands, and Taboga Island, both 
in the Bay of Panama * (coll. Cuming !—*). 
Var. juquilensis : fasciis angustioribus; long. 194, diam. 9-10 millim. 
Bulimus virgulatus, Tristram, P. Z. 8. 1863, p. 412 ™. 
Bulimus alternans, var. 8B, Pfr. Monogr. Helic. Vivent. vi. p. 131 ». 
Bulimulus (Liostracus) alternans, var. 8, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 501, 
t. 23. fig. 5a. 
Otostomus (Liostracus) alternans, v. Mart. Conch. Mittheil. ii. p. 192”. 
Bulimulus (Liostracus) mexicanus, var., v. Mart. in Malak. Blatt. xii. p. 24 (1865) (ex parte) ’*. 
Hab. 8. Mexico: Juquila, in the State of Oaxaca ® (Boucard 1°); Oaxaca (Uhde '). 
N. Guatemata: Vera Paz (Salvin 14). 
Dr. O. Stoll has observed this species upon a shrub, Baccharis salicifolia, in com- 
pany with O. jonasi, but much less frequent. During the dry season it conceals 
itself beneath stones and amongst the roots of the above-mentioned shrub, more rarely 
on its branches, and closes the aperture with a thin transparent epiphragma ; in this 
state it often becomes the prey of the rapacious Glandina aurata, which does not 
ascend the shrubs. He mentions also that full-grown specimens are comparatively 
rare. An unusually large specimen—long. 28, diam. 14, apert. 11 millim.—found at 
Panzos (Conradt), has been sent to me by Prof. Hausknecht of Weimar; its bands are 
very dark, nearly black, the shell thus approaching O. nigrofasciatus, Pfr., from 
Colombia (Reeve, Conch. Icon. v., Bulimus, t. 55. fig. 879), but differs from it in the 
distinct spiral striation and the comparatively narrower bands. 
Bulimus ziegleri is quoted by Fischer and Crosse as a variety of B. alternans, loc. 
cit. p. 501: concerning this name, there are several difficulties. (1) In the first 
description given by Dr. Pfeiffer, P.Z.S. 1846, p. 113 (repeated in Monogr. Helic. 
Vivent. ii. p. 175), the colour is simply said to be “albida,” no bands being mentioned, 
and the locality is said to be “Central America,” on the authority of Largilliert. As 
it is described as “subangulate on the last whorl” and only 21 millim. long, it may 
not be full-grown, as Fischer and Crosse have already suggested. I see no reason to 
* Quoted as “Saboga ” and “ King’s Island.” 
