14 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



Subgenus Cossmannica Dall and Bartsch 



1904. Cossmannica Dall and Bartsch, Proc. Biol. Soc. Washington, vol. 17, p. 6. 



Like Eulimella s.s., but with the aperture ovate. 

 Type: Pyramidella clandestina Deshayes. 



EULIMELLA (COSSMANNICA) PINELLASI, new species 

 Plate 2, figure 2 



Shell elongate-turrited, very slender, polished, cream-yellow. Nu- 

 clear whorls 2.5, well rounded, forming a depressed helicoid spire 

 whose axis is at right angles to that of the postnuclear turns, in the 

 first of which the nucleus is slightly immersed. The postnuclear 

 whorls are very slightly rounded, almost flattened, and marked by 

 microscopic lines of growth and spiral striations. Suture slightly 

 constricted. Periphery well rounded. Base rather long, well rounded, 

 marked like the spire. Aperture ovate; parietal wall glazed with a 

 thin callus ; columella slender with two weak oblique folds ; outer lip 

 curved, thin. 



The type, U.S.N.M, No. 561604, comes from the Pliocene deposits 

 of North St. Petersburg, Fla. It has 9 postnuclear whorls and meas- 

 ures : Length 4.7 mm., diameter 9 mm. 



Genus ORINELLA Dall and Bartsch 



1904. Orinclla Dall and Bartsch, Proc. Biol. Soc. Washington, vol. 17, p. 6. 



Shell elongate-turrited, umbilicated, surface polished or with micro- 

 scopic lines of growth and spiral striations ; peripheral sulcus present 

 in subgenus Sulcorinella, absent in subgenus Orinella, columella with 

 a single fold. 



KEY TO THE SUBGENERA OF ORINELLA 



Peripheral sulcus present Sulcorinella 



Peripheral sulcus absent Orinella 



^ Subgenus Sulcorinella Dall and Bartsch 



1904. Sulcorinella Dall and Bartsch, Proc. Biol. Soc. Washington, vol. 17, p. 6. 



Shell elongate-turrited, umbilicated, surface polished or with micro- 

 scopic lines of growth and spiral striation ; periphery sulcate, columella 

 with a single fold. 



Type: Pyramidella {Sulcorinella) c/odowa Dall and Bartsch. 



