494 MAZATLJLN UNIVALVES 



finely cancellated : also an extremely young shell, of similar 



sculpture, which may possibly be conspecific. 



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



620. ? METULA , n. s. (b) 



Tablet 2363 contains a young shell with 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. 

 Sab. 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 undulating ribs like Pisania, 

 and well marked spiral striae. 

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



622. ? METULA , 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 surface. 

 Hob. Mazatlan ; 1 sp. off Spondylus : L'pool Col. 



SUB-FAMILY NASSIKE. 

 GENUS NASSA, Lam. . 



Only one species in this genus was found in abundance : 

 another was not uncommon ; the rest were extremely rare or 

 only fragmentary. 



623. NASSA LUTEOSTOMA, Brod. fy Sow. 



Zool. Journ. vol. iv. p. 376, 1829. Eve. Mem. Conch, pi. 3. 

 f. Il.Mke. in Zeit.f. Mai 1850, p. 179, no. 44. C. S. Ad. 

 Pan. Shells, p. 62, no. 48. 



