494 MAZATLAN TNIVALrES 



finely cancellated : also an extremely young shell, of similar 

 sculpture, which may possibly be conspecific. 



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



620. ? Mettjla , n. s. [h) 



Tablet 2363 contains a young shell Trith 3 smooth, nuclear, 

 and two normal whirls ; also a fragment of an older one ; less 

 acuminate than the last species, with stronger sculpture, 

 more swollen whirls, and of a brownish colour. 



Sah. — Mazatlan ; portions of 7 sp. off Spondylus ; L'pool Col. 



621 ? Metula , sp. ind. [c] 



Tablet 2364 contains a very young shell and fragments, 

 belonging to a species with strong imdulating ribs like Pisania, 

 and well marked spiral striae. 



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



622. ? Metfla , sp. ind. (d.) 



Tablet 2365 contains a minute shell, of Metuloid shape and 

 sculpture, with four nuclear whirls remarkable for their closely 

 and minutely shagreened sm'face. 

 Hab. — Mazatlan ; 1 sp. off Spondylus : L'pool Col, 



Sttb-Faiiilt NASSIN^. 



Gekus NASSA, Lam. 



Only one species in this genus was found in abundance : 

 another was not tmcommon ; the rest were extremel}' rare or 

 only fragmentary. 



623. Nassa luteostoma, Brod. Sf Sow. 



Zool. Joum. vol. iv. p. 376, 1829.— 5i-e. Mem. Conch, pi. 3. 

 f. ll.-Ji7-e. in Zeit.f. Mai. 1850, p. 179, no. 14.— C. B. Ad. 

 Fa 71. Shells, p. 62, no. 48. 



