NO. 2207. WEST AMERICAN MELANELLID MOLLUSKS—BARTSCH. 333 



Two specimens of this species were found at Panama by Prof. C. B. 

 Adams. One of these, the type, is in the collection of Amherst Col- 

 lege, Amheret, Massachusetts. Tliis has nine whorls and measures — 

 length, 1.7 mm.; diameter, 0.6 mm. 



EULIMOSTRACA, new genus. 



Melanellids in which the inner lip is not appressed to the atten- 

 uated basal portion of the preceding whorl; whorls almost flattened; 

 outer lip of aperture not expanded; color markings present. 



Type. — Eulimostraca galapagensis Bartsch. 



EULIMOSTRACA GALAPAGENSIS, new species. 



Plate 43, fig. 1. 



Shell broadly elongate-conic, thin, translucent, showing the internal 

 structure through the substance of the shell. Whorls rather high 

 between the sutures, moderately well rounded, appressed at the 

 summit; poUshed, marked by exceedingly fine mcremental Hues 

 only. Suture lightly impressed. Periphery of the last whorl some- 

 what inflated; strongly angulated, marked by 'a narrow brownish 

 band. Base short, well rounded. Aperture very broadly oval; poster- 

 ior angle acute; outer lip thin, tmged with brown on the posterior 

 haK, decidedly protracted in the middle, to form a claw-like element; 

 inner lip strongly curved, slightly reflected, fusing onl}^ slightly, 

 posteriorly, with the preceding whorl; parietal wall covered by a 

 thin callus. 



The type and seven specimens (Cat. No. 251281, U.S.N .M.) were 

 dredged off Galapagos Island, by the United States Bureau of Fish- 

 eries steamer Albatross, at station 2813, in 40 fathoms,, on coral sand 

 bottom, bottom temperature 80*^. The type has 11 whorls and meas- 

 ures — ^length, 3.8 mm.; diameter, 1.2 mm. 



Genus SABINELLA Monterosato. 



Sabinella Monterosato, Natur. Sicil., 1890, p. 15. Type, Sabinella piriformis 

 Brugnone. 



Melanellids in which the inner lip is not appressed to the attenuated 

 basal portion of the preceding whorl; whorls strongly rounded; 

 aperture very large and outer lip decidedly expanded; color mark- 

 ings absent. 



SABINELLA CHATHAMENSIS. new species. 



Plate 43, fig. 4. 



Shell broadly conic, yellowish-white, polished, marlccd by exceed- 

 ingly fine protractive lines of growth only. The first two whorls 

 well rounded, separated by a well-impressed suture, succeeding ones 

 moderatel}'^ rounded. Aperture very large, somewhat channeled 



