STOMATELLA. 29 



Gena asperulata Ad., P. Z. S. 1850, p. 38 ; Thes. Conch, ii, p. 830, 

 t. 123, f. 28, 29. 



May be a true Gena, but the sculpture and form are more like 

 the present group. 



S. picta d'Orbigny. PI. 54, figs. 19, 20 ; pi. 21, figs. 22-25. 



Shell minute, ear-shaped, with large oval body-whorl and minute 

 spire ; surface shining, encircled by very numerous, fine, unequal 

 spiral threads, cut into close but indistinct granules by close impressed 

 longitudinal strise. Flesh colored, the spirals dark red ; spotted and 

 longitudinally maculate with opaque snowy-white ; columella white ; 

 spire minute ; whorls 2 i, the last large, oval, descending. Aperture 

 ovate, angular above, maculate within. 



Greatest length 4, greatest breadth 2} mill ; aperture, alt. 3, 

 breadth 2 mill. 



St. Thomas and Cuba; Florida Keys. 



Stomatia picta Orb., Moll. Cuba ii, p. 184, t. 24, f. 19, 21.— 

 Stomatella picta Orb., Dall, Bull. 37, U. S. Nat. Mus., p. 168, 1889. 



This species is usually a little smaller than the measurements 

 given above. About 30 specimens from St. Thomas are before me. 

 There is considerable variation in the intensity of the color, one 

 specimen being unicolored black, reddish on the spire. I have not 

 seen specimens truncated below as d'Orbigny's figures show his to 

 have been. It is reported from the Florida Keys by Dall and by 

 Simpson. S. concinna Gld., is a very similar species. 



Subgenus Niphonia A. Adams. 



Niphonia Ac, Annals and Magazine of Natural History, 3d ser., 

 vi, p. 336, 1860. Type, N. pulchella A. Ad. 



This little genus most nearly resembles Stomatella, but the shell is 

 very thin, and the aperture has an internal ledge, as if for the oper- 

 culum. Two specimens only were obtained, both dead, and both 

 wanting the opercula. (Ad.) 



N. pulchella A. Adams. 



Shell smooth, pale brown, shining, spirally lirate ; whorls 2i, con- 

 vex ; the last having five larger transverse lira? and many smaller 

 basal ones ; umbilical region impressed; margin of peristome acute. 

 (Ad.) 



Off Mino-Sima, Corea Strait, 63 fms. 



N. pulchella Ad., Ann. Mag. N. H. 1860, p. 336. 



