BULIMULUS. 249 
Bulimulus berendti (part.), Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. t. 6. fig. 15 (upper 
figure), v. p. 55°. 
Var. berendti: gracilior, 
Bulimus behrendti, Pfr. in Malak. Blatt. viii. p. 168, t. 3. figg. 4, 5 (1861) ”. 
Bulimus berendti, Pfr. Monogr. Helic. Vivent. vi. p. 149°. 
Bulimulus berendti, Binney & Bland, Am. Journ. Conch. vii. p. 182 (jaw and radula)*; Strebel, 
Beitr. Mex. Land- und Siissw.-Conch. iv. t. 6. fig. 15 (lower figure), v. p. 55". 
Bulimulus (Leptomerus) berendti, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p- 554, t. 21. 
figg. 8, 8a". 
Hab. EB. Mexico: State of Vera Cruz (Sallé}?); Jalapa, common (Hége); Orizaba 
(Hegewisch and Berendt2 2578 10 11); Cordova (Berendt® 1, Sallé®, Hoge); Vera 
Cruz, in the “callejones,” on shrubs (Strebel 1°); Toxpan, near Cordova (Sallé ®, 
Berendt'); Atoyac (Hoge). 
S.E. Mexico: Tabasco?; Teapa and San Juan Bautista, in the same State (H. H. 
Smith). 
S.W. Mexico: Cacoprieto, near Santa Efigenia, Tehuantepec (Sumichrast '°). 
After examining a large number of specimens, most of them collected by Hoge, I 
have no doubt that Strebel is perfectly justified in uniting B. coriaceus and B. berendti. 
He does not even distinguish them as varieties, whereas Fischer and Crosse not only 
maintain them as distinct species, but also describe and figure very short and subglobose 
specimens from Toxpan and Orizaba as var. B of coriaceus. The chief difference is, 
whether the whorls merge a little more or less one into the other; of course in the 
more involute specimens each whorl must become somewhat more convex in order to 
gain outwards the room which is lost by the deeper immersion of the preceding whorl, 
and as a result the suture will be somewhat more marked and the umbilicus a little 
more open. Therefore we find in Pfeiffer’s Monograph B. coriaceus in the “ § perforati 
vel umbilicati,” and b. berendti in the ‘) subperforati,” and somewhat widely sepa- 
rated from each other; this is probably the chief reason why Pfeiffer did not unite 
them himself. Most of the specimens collected by Hoge are intermediate between the 
two extremes. In the geographical distribution there also seems to be no difference, 
the same localities having been quoted for the two so-called species. 
I have not enumerated other more southern localities mentioned by Fischer and 
Crosse 1! for B. berendti :—(1) Boom, in Belize (British Honduras), on the authority 
of Dr. Berendt, as neither Strebel nor Pfeiffer mentions this locality; and (2) 
Nicaragua on the authority of Tate and Binney, because the specimens from that 
country have been subsequently recognized as belonging to B. corneus. 
10. Bulimulus inermis. 
Bulimus inermis, Morelet, Test. Noviss. ii. p. 10 (1851) *; Pfr. Monogr. Helic. Vivent. iii. p, 441 *. 
BIOL. CENTR.-AMER., Terr. and Fluviat. Mollusca, November 1897. 32 
