MAZATLAN UNIVALVES 515 



Tablet 2438 contains a very young sp. '64 long, with opercu- 

 lum, and long canal. 



Tablet 2439 contains 6 sp. normal form. 2440, 7 sp. smooth 

 form, transverse. 2441, 10 sp. do. elevated. 2442, 9 sp. ribbed 

 form, elevated. 2443, 9 sp, do. transverse. 2444, 5 sp. umbili- 

 cated rough var. 2445, 3 sp. recovered from severe fractures. 

 2447, 2 do. encrusted with Bryozoa. 2448, 1 do. epidermis 

 orange. 



Tablet 2449 contains 12 normal opercula. 2450, 6 do. repair- 

 ed after fracture, generally with central nucleus. 



660. PlSANIA (? PAGODUS, var.) ^IQUILIEATA. 



P. t. "P. insigni" simili, sed multo minor e, anfr. valde 

 iumentibus, costis validis ad basin continuis, liris cequalibus 

 cinctd quorum v. in spird monstrantur ; plied columellari 

 basali angulatd. 



Comp. Buccinum pagodus, Eve. Conch. Ic. pi. 7, 'sp. 50. 

 C. B. Ad. Pan. Shells, p. 70, no. 61. = Cantharus pagodus, 

 H. $ A. Ad. Gen. i. 85. 



One dead specimen was found, differing from the most 

 dwarfed varieties of P. insignis in the above characters. It is 

 of a uniform reddish brown, and apparently had very fine 

 striulse between the ribs. It is at once known from P. gem- 

 mata by the tumidity of the whirls. It has the general aspect 

 of Buccinum biliratum, Eve. Conch Ic. pi. 10, sp. 71 (Galapagos, 

 CumingJ, but differs in sculpture. It may be a dwarf B. 

 pagodus ; but the Cumingian type is not at present accessible ; 

 and it is rarely safe, in critical cases, to identify from the 

 figures and descriptions in the Condi. Ic. alone. Long. "98, 

 long. spir. '45, lat. '54, div. 50. 

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



Tablet 2451 contains the specimen. 



^ 661. PlSANIA GEMMATA, Eve. 



Buccinum gemmatum, Eve. Conch. Ic. pi. 7, f. 49.-~3/&. in 



Zeit.f. Hal. 1850, p. 179, no. 42. 



= Buccinum gemmulatum, Mice. loc. cit. 1847, p. 180, no. 12. 

 = Buccinum undosum, fern. (Linn.) Kien. Icon. Conch, p. 39, 



no. 4D, pi. 12, f. 41 (pars) : v. Desk, in Lam. An. s. Vert. 



vol. ix. p. 642, no. J1, not. (1). 



