208 MOLLUSCA. 
which are either somewhat square and arranged in spiral rows (Philippi), and 
specimens from Chihuahua), or more irregular and combined, sometimes at acute 
angles (specimen from Ventanas) ; in a specimen from Chihuahua the pale spots of the 
type are seen within some of the larger brown patches. 
The sculpture of this species is somewhat coarsely rugoso-striate, but it cannot be 
termed undulated, as in O. fenestratus, Pfr. Most of the specimens I have seen show 
remarkable irregularities and scars, some even at the apex, caused by previous fractures 
during life. Probably they live on conspicuous objects during the wet season, and 
often fall to the ground. 
Radula of var. forreri examined by myself. 
12. Otostomus sulcosus. (Tab. XIII. figg. 3, 3a, 4.) 
Bulimus sulcosus, Pfr. Symb. Hist. Helic. i. p. 43 (1841)*; Philippi, Abbild. neuer Conch. i. p. 56, 
t. 1. fig. 9°; Pfr. Monogr. Helic. Vivent. ii. p. 196°. 
Bulimus (Mesembrinus) sulcosus, Albers, Die Helic. ed. 1, p. 157"; Pfr. in Malak. Blatt. ii. p. 158 
(1855) °. 
Orthalicus (Mesembrinus) sulcosus, H. & A. Adams, Gen. Moll. ii. p. 157°. 
Bulimulus (Scutalus) sulcosus, v. Mart. in Albers’s Die Helic. ed. 2, p. 217"; Fisch. & Crosse, Miss. 
Scient. Mex., Mollusca, i. p. 520, t. 28. figg. 2, 2a, b°. 
Otostomus (Scutalus) sulcosus, v. Mart. Conch. Mittheil. ii. p. 193°. 
Bulimus hyematus, Reeve, Conch. Icon. v., Bulimus, t. 49. fig. 824 (1848) *°. 
Bulimulus (Scutalus) sulcosus, var. a. hiematus, v. Mart. in Malak. Blatt. xii. p. 33 (1865) **. 
Var. butterti: fasciis continuis. 
Bulimulus (Drymeus) botterii, Crosse & Fisch. in Journ. de Conch. xxiii. p. 52 (1875); Fisch. & 
Crosse, Miss. Scient. Mex., Mollusca, i. p. 487, t. 24. figg. 10, 10a"; Strebel, Beitr. Mex. 
Land- und Siissw.-Conch. v. p. 63“. 
Bulimus botterii, Pfr. Monogr. Helic. Vivent. viii. p. 61". 
Bulimulus sulcosus, form A (part.), Strebel, loc. cit. p. 61, t. 6. fig. 17"°; form B, p. 62, t. 5. fig. 4.2". 
Hab. CuntRAL Mexico: near the city of Mexico (Boucard 8, Hahn 17); valley of Mexico 
(Bourgeaw®); Tacubaya (Heycwisch1-*); summit of the Sierra de las Aguas 
Escondidas, at an elevation of 9500 feet above the sea (7. H. Smith); 'Tuxpan * 
(Stredel 37), . 
Mexico, without nearer indication of locality (Uhde 11), 
{E. Mexico: Orizaba (Botteri 12-16), 
* Strebel ” mentions also a specimen of this species from “ Tuspan, a little harbour on the east coast ;” but 
as there are other localities of the same name on the plateau of Central Mexico, in the States of Michoacan 
and Jalisco, it is probable that one of these latter places may be intended. Respecting this, Strebel writes me 
as follows :—‘T received the said specimen from an acquaintance who said he had found it at the harbour of 
Tuspan, but the same person lived usually on the elevated plateau of Mexico; whether it was a mistake I 
cannot decide.” As all other localities for this species are confined to the central plateau of Mexico, and none 
of the numerous collectors who have explored the east coast have registered it from there, I think it safer not 
to include the east coast in the range of this species without further corroboration. 
