/ 
MAZATLAN UNIVALVES 379 
1800, 3 do. light brown, without red.—1801, 5 sp. light brown- 
ish purple, with red stain.—1802, 4 do. diffused purple red.— 
1803, 5 sp. diffused red.—1804, 4 sp. reddish pink.—1805, 4 sp. 
shewing changes of size.—1806, 5 sp. elongated form.—1807, 
4 sp. broad.—1808, 4 sp. shewing variations in sculpture.— 
1809, 2 sp. distorted, and one broken’open, shewing inner lip.— 
1810, 2 dead sp. with ribs very distant, having the aspect of 
JT. radians. They may belong to T. Californica. 
443, TRivia PULLA, Gash. 
Cypreéa pulla, Gask. in Proc. Zool. Soc. 1846, p. 24:—do. 1848, 
p- 97, no. 11.—(Non C. pulla, Gmel.=C. adusta, Chem.) 
One specimen was found of this pretty little species. It is 
more elongated than T. subrostrata, with projecting beaks ; 
the ribs interlocking alternately on the dorsal line; colour 
brownish purple ; columellar indentation long and deep. 
Long. °25, lat.°17, alt. °14. 
Hab.— Galapagos Is. and Bay of Guayaquil ; Cuming. — 
Mazatlan ; 1 sp. with T. sanguinea ; L’pool Col. 
Tablet 1811 contains the sp. : 
444, TRIVIA SUBROSTRATA, Gray. 
Zool. Journ. vol. i. p. 363, (teste Rve.) 
Cyprea subrostrata, Sow. Conch. Ill. p. 13, sp, 119, f. 36.— 
Rve Conch. Ic. pl. 26, sp. 147.—Mke. in Zeit. f. Mal. 1851, 
p. 34, no. 116. 
Non Cyprea subrostrata, Desh. in An. s. Vert. vol. x. p. 581, 
no. 30, “‘fossile D’Orglande et de Nehou,...... coquille lisse 
et polie...... = Gray, Monogr. Cypr. Zool. Journ. vol. i. p. 369, 
no. 30 :— Descr. Cat. Shells, p. 5, no. 36.” 
There appears to be a W. Indian species, so closely allied to 
this, that the figures quoted might apply to either. Dr. Gray 
however identified the solitary Mazatlan shell with the above 
name. The W. Indian shell (Bristol Mus.) is of a richer 
colour, with the beaks less rostrate, and the dorsal sinus 
deeper and broader. Long. °25, lat. °18, alt. 16. 
Hab.—Mazatlan; 1 dead sp. ; L’pool Col. 
Tablet 1812 contains the specimen. 
