MAZATLAN UNIVALVES 175 
Dr. Gray unites Oleacina, Glandina and Halia under the 
former name, (B. M. Cat. Pulm. p.13;) H & A, Adams con- 
sider them distinct: Gen. vol. ii. p. 107. Ordinary students 
have no power of ascertaining whether generic names given 
with an early date are accompanied by a diagnosis, and there- 
fore of authority, or whether they are only names which have 
been attached to certain species, and not entitled to take pre- 
cedence of aregularly defined genus.—The animal of Glandina 
is said to be carnivorous, and to resemble Testacellus with the 
spiral part developed. 
230. GLANDINA ALBERSI, Pfr. 
Achatina Albersi (Glandina) Pfeif. in Proc. Zool. Soc. 1854, 
p. 295. 
A very few specimens of this unpretending species were 
found among the Phys. It appears to take the place of G. 
rosea, found lower down the peninsula. The shape is extremely 
variable, being sometimes elongated like G. turris ; sometimes 
very much swollen, with a short spire. A turreted specimen 
measures . : : long. 1°2, long. spir. °59, lat. °d. 
A swollen sp. . : Fearne (eee , SADE Ory, ele 
Hab.—Mazatlan ; extremely rare ; L’pool Col. 
Tablet 794 contains 3 sp.: one turreted, one swollen, one 
curiously mended after fracture. 
231. GLANDINA TURRIS, Pfr. 
Achatina turris (Glandina) Pfr. Symb. ii. p. 91, no. 126:— 
Mon. Helic. ii. 288.—Rve. Conch. Ic. pl. 13, t 45.— Desh. 1. e. 
186, no. 51, pl. 134, f.1,2.— B. M. Cat. Pulm. pt. i. p. 25, no. 29. 
=\C 7 Albersi, var. turrita, P. P. C., Cat. Prov. 
Acicula turris, H. & A. Ad. Gen. vol. ii. p. 109. 
This species is kept separate provisionally on the authority 
of Dr. Pfeiffer. As only one specimen was found in the Maz- 
atlan collection, it would not be fair to decide without further 
evidence. It appears to differ from the elongated var. of G. 
Albersi, simply in the still greater elongation, greater arcuation 
of the columella, and greater fineness of the strie. But all 
these characters are variable in the other species. Long. 1°2; 
long. spir. °61, lat. °48. 
Hab.—Mexico, Liebmann. — Mazatlan ; ; Lsp. among Physa; 
L’pool Col. 
Tablet 795 contains the specimen. 
