84 ADEORBIS. 



A. Adamsi, Fischer. PI. 30, fig. 78, 



Convexly depressed, with sharp spire, sinuously concentrically 

 striate, umbilicus rather Avide, aperture wide, obliquely oval. 



Diam. 4 mill. 



Guadeloupe, W. I., Cedar Key, Fla. 



A. Seguenzianus, Tryon. PI. 30, fig. 79. 



White, widely umbilicated, whorls very oblique, spire elevated, 

 suture impressed, microscopically striate, with intermediate spiral 

 lines, last whorl very oblique, umbilicus surrounded by an obtuse 

 angle of the base. Diam. 4 mill. 



Italy, Sicily ; 11-108 fms. 



Seguenza describes this species as A. depresses, preoccupied by A. 

 Adams. 



A. FRAGiLis, G. 0. Sars. PI. 30, fig. 80. 



Thin, fragile, whitish, or slightly brownish, spire elevated, reg- 

 ularly si)irally striate, whorls convex, with deep suture, last whorl 

 obliquely flattened above, aperture obliquely ovate, patulous, umbil- 

 icus large, defined by an obtuse angle. Diam. 2 mill. 



LoffodenlsL; W. coast of Norway ; 60-190 fms. 



A. PROMiNULA, A. Ad. PL 30, figs. 81, 82. 



Umbilicus moderate, slightly bordered; thinly concentrically stri- 

 ate, translucent, polished, whorls scarcely prominent, rapidly increas- 

 ing, aperture obliquely I'ounded. Diam. 2 mill. 



Mino-Shna, Japaii. 



A. MANULA, A. Ad. PI. 30, fig. 83. 



Moderately umbilicated, depressed, subdiscoidal, the spire a little 

 exserted, Avhorls rounded, slowly increasing, umbilicus bordered, 

 aperture rounded, Diam. 2'5 mill. 



Mino-Sima, Japan. 



A. TROCHULA, A. Ad. PI. 30, fig. 84. 



Umbilicus small, defined by a rib, spire rather elevated, trochiform, 

 the whorls slojiing above, periphery bluntly angulated, aperture 

 rather round. Diam. 3*5 mill. 



Gotta Is., Japan. 



A. PATRUELis, A. Adams. PL 30, figs. 85, 86. 



Semipellucid, white, spire slightly elevated, last whorl sloping- 

 above, obtusely triangular, rather flattened below, umbilicus some- 

 what narrow, columellar lip erect. Diam. 3 mill. 



Mino-Sima, Japjan . 



