DA COSTA : NEW LAND-SHELLS EROII SOUTH AMEEICA. 83 



anfractibus 5, ]uxta suttiras planatis, siiperne tumicle plicate - 

 corrugatis, deinde rotrmdatis, spiraliter tenuiter liratis, anfractu 

 ultimo ad peripheriam obtuse angulato, circa umbilicum Isevi, apertura 

 oblique circular!, peristomate simplice, ad suturam profunde sinuata ; 

 operculo corneo, arctispirato, ad suturas at peripberiam laciniato-. 

 Diam. maj. 32, min. 25 mm.; alt. 20 mm. 



Sah. — Cacbabi, Ecuador. 



A very interesting shell, distinguished from any other species of 

 this genus, in that it has at the juncture of the aperture and the last 

 whorl a deep sinuation, similar in character to that of Pteroci/clos ; the 

 upper surface of the shell resembles that of C. Vesconesi, also from 

 Ecuador, and described by M. Jousseaume in Le Natiiraliste for 

 ITovember, 1897, but it differs in the form of the umbilicus as well 

 as in the sinuation, which forms a peculiar feature in the new species. 

 I have much pleasure in naming it after Mr. Eosenberg, its discoverer. 



11. Steophocheilus (Eurytxjs) sub-irkoeatus, n.sp. Eig. II. 



St. testa acuminato-oblonga, medio ventricosa, imperforata ; an- 

 fractibus 6, sub lente striis subtilissimis impressis spiralibus sculptis, 



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Fig. I. — Strophocheilus dol'mrius, u.sp. 

 ,, II. — S. suh-irroratus, n.sp. 



infra suturaim tenuiter plicatis, columella simplici, castaneo -purpurea ; 

 cinereo-fusco longitudinaliter strigata; columella cserulescente-alba, 

 labro rcflexo, incarnato-roseo, apertura iridescente, lilacea. Long. 63, 

 diam. 33 mm. ; apertuj^a cum perist., longa 34, lata 22 mm. 



Hob. — Paramba, Ecuador. 



This species presents a general resemblance in form to S. irroratus, 

 Eve., but differs from it in tlie absence of the raised striae which cover 

 that shell and the peciiliar crenulation beneath its sutures. 



