MAZATLAN UNIVALVES 370 



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 

 T. radians. They may belong to T. Californica. 



443. TEIVIA PULLA, Gash. 



Cypraea pulla, GasTc. 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. 

 JIab. Galapagos Is. and Bay of Guayaquil ; Cuming. 



Mazatlan ; 1 sp. with T. sanguinea ; L'pool CoL 



Tablet 1811 contains the sp. 



444. TRIVIA SUBKOSTBATA, Gray. 



Zool. Journ. vol. iii. p. 363, (teste Rve.) 



Cypraea subrostrata, Sow. Conch. HI. p. 13, sp, 119, f. 36. 



Rve Conch. Ic. pi. 26, sp. 147. Mke. in Zeit.f. Mai. 1851, 



p. 34, no. 116. 

 Non Cyprsea 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. 



Hob. Mazatlan ; 1 dead sp. ; L'pool Col. 

 Tablet 1812 contains the specimen. 



