MAZATLAJf BIVALVES 97 



Lucina tigerina, Desk. JEiic. Ifeth. vers. t. 2, p. 384, no. 37. — 

 Sow. Gen. JjMC.— Desk, in Lam. he. cit. p. 318, (2). — Forbes 

 ^ Sanl. Br. Moll. vol. ii. p. U.—B. M. Cat. Cuba Moll. 

 p. 41, no. 499. 



Tliis abundant W. Indian sliell wiU not be received by many 

 as belonging to the Pacific fauna. I can only say that I found 

 the specimen, i^apered and numbered in the Dosirua box, per- 

 fectly fresh, and bearing every mark of having been taken 

 alive. As further evidence of its lingering existence in these 

 eeas, I record finding a fresh valve among a collection from the 

 S. W. Mexican coast. The shells are both exactly like the 

 normal W. Indian type, and differ essentially from its Panama 

 analogue, L. pxmctata, Linn. Long. 1'48, lat. 1'6, alt. "58. 



JIab. — West Indies, passim. (Jamaica, Lister. — Barbadoes, 

 P. P. C. — St. Domingo, D'AvUa. — Cuba, Sagra.) — Amboyna, 

 Kumphius. — Nicobar Is., Chemnitz. — [Britain, Montague, 

 &c. ? imported.]— S. W. Mexico, 1 fresh valve, P. P. C— 

 Mazatlan ; 1 fresh specimen ; L'pool Col. 



Tablet 464 contains the specimen. 



137. Lucina ?? punctata, Linn. 



Venus punctata, Linn. Si/st. Nat. p. 1134. — Ckemn. Conch. 



Cab. vii. p. 15, pi. 37, f. 397-8. 

 Cj-therea punctata. Lam. An. s. Vert. vol. vi. p. 319, no. 54. 

 Lucina punctata. Desk. Diet. Class, d'hist. nat. t. 9. — Sow. Gen. 



Luc. f. 1. — Roe. Conck. Ic. pi. 1, f. 2. 



Tablet 465 contains two minute valves, '03 across, which are 

 evidently the young of a somewhat large species, perhaps this. 

 One of them has close radiating ribs from the commencement ; 

 the other is smooth, with striae of growth ; till, near the margin, 

 after a sharp concentric ridge, it suddenly betakes itself to 

 making longitudinal ribs. The teeth somewhat resemble the 

 young of Dione, with the extreme ones very large in proportion. 

 Hah. — "L'Ocean des Grandes Indes," Lamarck. — Panama, on 

 the sands at low water, Cuming. — ?? Mazatlan ; jun. extreme- 

 ly rare, in shell w^ashings ; L'puul Col. 



138. Lucina Pannulata, Reeve. 

 Reeve, Conck. Ic. pi. 4, f. 17. 



Tablet 4G6 contains a frag nent with rounded concentric ribs, 

 and very fine concentric stria3 traveling over bjt'i ribs and 

 Nov. 1855. k 



