LO 
Or 
bo 
MOLLUSCA. 
p. 24 (1865). But several authors have tried to recognize it in truly Mexican 
species (see the synonymy of Otostomus emeus and 0. tryont). 
I may be allowed to add a few remarks concerning Bulimus rimatus, Pfr., and B. 
spirifer, Gabb, which have sometimes been confounded with B. membranaceus (Phil.), 
see anted, p. 223, also Fischer and Crosse, Miss. Scient. Mex., Mollusca, i. p. 560, 
suggesting that all three may possibly belong to the same species. By comparing 
Pfeiffer’s original description of B. rimatus, P. Z. 8. 1846, p. 112, and Monogr. Helic. 
Vivent. ii. p. 104, from a specimen in Cuming’s collection, and the figure given by 
Reeve, Conch. Icon. v., Bulimus, t. 54. fig. 859, with specimens of B. spirifer from 
the Peninsula of Lower California, I have no doubt that the two are identical and that 
Pfeiffer’s name must be adopted. The locality “ Afghanistan” given to B. rimatus in 
Albers’s Die Helic. ed. 2, p. 233, is evidently a mistake, the printer having misunder- 
stood the sign of interrogation (?) in the manuscript and changed it into the sign of 
repetition (,,); in Albers’s collection no locality is given, and the shell is identical 
with that of B. spirifer. What Jay’s B. rimatus, Pfr., from Japan [Perry’s Narrative, 
ii, p. 296 (1856)], may have been, I do not know. But Philippi’s B. membranaceus 
is proved by the original description and figure (see anted, p. 223) to differ from 
B. spirifer; distinct spiral striea are mentioned, but not the characteristic columellar 
fold: in several collections, however, these names are misapplied. 
SIMPULOPSIS. 
Simpulopsis, Beck, Ind. Moll. p. 100 (1838). 
Shell very thin, oblong, with comparatively few whorls, the last ventricose; the 
aperture large, with thin simple peristome. Jaw arcuate, with six ribs in the middle 
and three stronger ones on each side. Radula with oblique rows; median tooth 
shovel-shaped, and in some species with a minute lateral point on each side; lateral 
teeth also shovel-shaped, with a short external lateral point ; marginals unequally tricus- 
pidate. [Heynemann, Malak. Blatt. xv. p.111, t.5. fig. 10 (1868); Binney, Bull. Mus. 
Comp. Zool. v. no. 16, p. 338, t. 1. fig. g.] 
The shell has the appearance of a Vitrina or Succinea, but the radula is more like 
that of Bulimulus. | 
Geographical distribution: Brazil, West Indian Islands, Mexico, and Guatemala. 
Whether the few species quoted from the islands of the Indian and Pacific Oceans 
really belong to this genus is rather questionable. See also AXanthonyz, infra. 
