500 MAZATLAN UNIVALVES 



635. NASSA , sp. ind. (g.) 



Tablet 2404 contains a young shell and fragment (perhaps 

 not conspecific) with flattened whirls, flattened ribs, and spiral 

 decussations which do not cross the ribs. 

 Hal). Mazatlan ; extremely rare ; L'pool Col. 



636. NASSA , sp. ind. (h.) 



Tablet 2405 contains 2 fragments (perhaps not conspecific), 

 with 3 smooth nuclear whirls ; normal whirls flattened, crossed 

 by fine spiral striae. 

 Hob. Mazatlan ; extremely rare ; L'pool Col. 



637. NASSA , sp. ind. (i.) 



Tablet 2406 contains a fragment of a very elevated species, 

 white, with the broad concave interstices of the sharp ribs 

 spirally striated. 

 Sab. Mazatlan ; extremely rare, off Spondylus ; L'pool Col. 



Tablet 2407 contains an egg case, probably of a Nassa, off 

 Spondylus. Lpool Col. 



FAMILY PYEULID^E. 

 GENUS PYEULA, Lam. 



Pyrula, Lam. 1799, pars -.Phil. Handb. Conch, p. 141. 



Melongena, Schum. 1817. 



Cassidulus (Humph.) Gray, Proc. Zool. Soc. 1847, p. 136, 



no. 21 : H. $ A. Ad. Gen. vol. i. p. 81. 

 G-aleodes, Bolten. 

 Semicassis, Martin, (teste Desk.) 

 Cyrtulus, sp. Hinds. 



? 638. PYEULA PATULA, Brod fy Sow. 



Zool. Journ. vol. iv. p. 377. Zool. Seech. Voy. p. 115, pi. 34, 

 f. 10, jun., pi. 35, f. 3, jun., pi. 35, f. 1. adult. Kien. Icon. 

 Conch, p. 14, no. 9, pi. 2, f. 1, 2. Desk, in Lam. An. s. Vert. 



