CADULUS-GADILA. 177 



C. MONTEROSATOI Locard. 



Shell of subtruucate conoid (" subtronconoide ") form, but little 

 arched altogether, strongly swollen in the region above the middle. 

 Superior region very short, a little more constricted than the 

 inferior, terminating in a circular section in a horizontal plane ; 

 inferior region short, but a little longer than the superior, terminat- 

 ing in a noticeably oval section in a slightly oblique plane. 



Anterior profile undulating, feebly projecting above the middle ; 

 posterior profile notably more arched, with the greatest convexity 

 a little above the middle, more abruptly tapering upward than 

 downward, Shell somewhat thin, quite solid, subtransparent, 

 smooth, very glossy, becoming a porcelain white after death. 



Alt. 6, greatest diam. 2, least 1 mill, (ioc.) 



West of Cape Finistere, 2018 meters depth. 



Cadulus monterosatoi Loc., L'Echange, 1897, p. 4. 

 C. ARTATUS ' Jeffreys ' Locard. 



Shell of narrowly subconoid shape, well curved, and inflated 

 throughout the median region ; superior region more constricted 

 than the inferior and more lengthened, terminating in a perceptibly 

 circular section, in a slightly oblique plane; inferior region a little 

 greater in diameter, a little shorter, terminating in a distinctly oval 

 section, in a plane perpendicular to the long axis of the shell. 

 Anterior outline regularly arched, with a slight swelling a little 

 below the middle; posterior outline well arched, with a very 

 regular, very long swelling, making a nearly continuous curvature 

 of the superior and inferior regions, the greatest convexity a little 

 below the middle. Shell rather thim, fragile, subtransparent, 

 diaphanous, becoming opaque with death of the animal, smooth 

 and glossy. Alt. 4, greatest diam. 0'75, least 0'5 mill. (Loc.) 



Gulf of Gascony, 1019 to 2651 meters depth. 



Cadulus artatus Jeffreys, LOCARD, L'Echange 1897, p. 4. 



CADULUS SEMISTRIATUS and C. ARTATUS Jeffreys, Ann. Mag. N. 

 H. (5), vi, p. 317, are merely list names, which Jeffreys did not make 

 good by descriptions. Locard has lately given a diagnosis of the 

 latter, translated above. 



Species of the West Coast of North and South America. 



I. Shell large (about 24 mill, long), longitudinally striated. 



a. StriaB close, even, deeply engraved ; length 7 times the 

 greatest diameter, albicomatus, p. 178. 



12 



