MAZATLAN BIVALVES 97 



Lueina tigerina, Desk. Enc. Melh. vers. t. 2, p. 384, no. 37. 

 Sow. Gen. Luc. Desk, in Lam. loc. cit. p. 318, (2). Forbes 

 $ Hani. Sr. Moll. vol. ii. p. G4. B. M. Cat. Cuba Moll 

 p. 41, no. 499. 



This abundant W. Indian shell will not be received by many 

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

 the specimen, papered and numbered in the Dqsinia box, per- 

 fectly fresh, and bearing every mark of having been taken 

 alive. As further evidence of its lingering existence in these 

 seas, 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. punctata, Linn. Long. 1*48, lat. 1*6, alt. '58. 

 Hab. West Indies, passim. (Jamaica, Lister. Barbadoes, 

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

 Humphius. Nicobar Is., Chemnitz. [Britain, Montague, 

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

 Mazatlaii ; 1 fresh specimen ; L'pool Col. 

 Tablet 464 contains the specimen. 



137. LUCINA ?? PUNCTATA, Linn. 



Venus punctata, Linn. Sysf. Nat. p. 1134. CJiemn. Conch. 



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



Cytherea 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. L Eve. Conch. Ic. pi. 1, f. 2. 



Tablet 465 contains two minuts 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 strife 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, 

 Hab. "L'Ocean des G-randes Indes," Lamarck. Panama, on 

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

 ly rare, in shell washings ; Lpool Col. 



138. LUCINA PANNULATA, Reeve. 

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



Tablet 466 contains a fragment with rounded concentric ribs, 

 and very fine concentric stria) traveling over both ribs and 

 Nov. 1855. Jc 



