232 MOLLUSCA. 
regard it as a variety of OQ. alternans. (2) The specimen labelled Bulimus ziegleri in 
Albers’s collection, mentioned in his ‘ Die Heliceen,’ ed. 1, p. 156, ed. 2, p. 213, is 
for the most part also white, but has on the upper whorls faint reddish bands, two 
visible on each whorl (in QO. alternans three are visible). It is 27 millim. long and has 
the peristome a little expanded; it is therefore full-grown. This shell is said to have 
been obtained in Northern Peru, and I suppose it must belong to another species. 
(3) Reeve, Conch. Icon. v., Bulimus, t. 58. fig. 389, figured as Bulimus zteglert a 
probably not quite adult shell, yellowish, with interrupted bands on all whorls; it may 
belong to the var. B of B. ziegleri, Pfr. (Monogr. Helic. Vivent. ii. p. 175), but he 
gives “Central America” as the locality, which is probably taken from Pfeiffer’s first 
description. This figure may represent our Otostomus emeus. (4) The shell from 
Mazatlan called Bulimus ziegleri by Carpenter (Cat. Mazatlan Shells, p. 177) is 
banded; it is an unusually large specimen, about 18 millim. (0°60 inch) long and 
10 millim. (0°34 inch) broad, with evanescent bands, and may belong to 0. califor- 
nicus, Reeve. This Mazatlan species has been admitted by Binney and Tryon, under 
the name of Bulimulus ziegleri, as belonging to the North-American fauna, but Binney 
gives no illustration of it. Concerning the localities, “ Republ. Mexico” (Lirebmann, 
in Pfr. Monogr. Helic. Vivent. ii. p. 175), “‘ Chiapas” (Pfr. Monogr. Helic. Vivent. vi. 
p 115), and “ Monte Canela, near Chicalapa” (Sad/é, in Fisch. & Crosse, Miss. Scient. 
Mex., Moll. i. p. 501), I cannot make out to which of the said forms they are to be 
referred. 
43. Otostomus honduranus. 
Bulimus hondurasanus, Pfr. P. Z.S. 1846, p. 29’; Monogr. Helic. Vivent. ii. p. 2097; Reeve, 
Conch. Icon. v., Bulimus, t. 59. fig. 400 *. 
Bulimus honduratianus, Tristram, P. Z.S. 1861, p. 230°. 
Bulimus (Leptomerus) hondurasanus, Pfr. in Malak. Blatt. u. p. 160 (1855) °. 
Orthalicus (Leptomerus) hondurasanus, H. & A. Adams, Gen. Moll. ii. p. 156 °. 
Bulimulus (Liostracus) hondurasanus, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 503”. 
Hab. Honpuras (Dyson }~*). 
This species bears some resemblance to O. tryoni; but it seems to differ in the shell 
being rather thin and diaphanous, with the bands more narrow and four (instead of 
three) in number. 0. meridanus, Pfr., from Merida, is perhaps more nearly allied 
to it. It may prove to be inseparable from O. alternans. 
Tristram * recognized this species also among Guatemalan specimens collected by 
Salvin; but as I cannot find an example of it among those entrusted to me by Salvin 
himself, I cannot add Guatemala to its distribution. 
44, Otostomus tryoni. 
Bulimus mexicanus (Lamarck), Reeve, Conch. Icon. v., Bulimus, t. 40. fig. 244°. 
