ADEORBIS. 85 



A. suBANGULATus, A. Ad. PL 30, figs. 87, 88. 



Umbilicus narrow, defined by an angle, rather solid, last whorl 

 gibbous and obscurely angular near the suture, outer lij) sinuously 

 produced above. Diam. 3 mill. 



Gotto Is., Japan. 

 A. Sinensis, A. Ad. PI. 30, figs. 89, 90. 



Depressed, solid, opaque, spire slightly elevated, decussated by 

 minute concentric and spiral striae, Avhorls rounded, umbilicus rather 

 large, aperture nearly round. Diam. 3 mill. 



China Sea. 



A. NiTiDus, A. Ad. PI. 30, figs. 91, 92. 



Whorls rounded, with impressed suture, spire slightly elevated, 

 umliilicus large, defined by an angle, a2)erture nearly round. 



Diam. 3"5 mill. 



Philippines. 



A. CARiNATUS, A. Ad. PI. 30, figs. 93, 94. 



Whorls rounded, the last gibbous towards the suture, flattened on 

 the base, which is surrounded by a keel, becoming stronger towards 

 the aperture, umbilicus rather large, defined by an angle, aperture 

 obliquely subquadrate. Diam. 4 mill. 



Seto-Uchi, Japan. 



A. PLANOEBULUs, A. Ad. PI. 30, figs. 95, 96. 



Shell much depressed, planorbiform, spire not raised, whorls round- 

 ed, the last rapidly increasing towards the aperture, umbilicus very 

 large, not defined, aperture round. Diam. 4'5 mill. 



Philijjpines. 



A. suBCARiNATUS, Montagu. PI. 30, fig. 97. 



Depressed turbinate, white, subcostulate-striate, er.circled by two 

 or three equidistant spiral threads above, sometimes obsolete, occa- 

 sionally developed into ridges, base convexly flattened, bicarinated, 

 umbilicus moderate. Diam. 3 mill. 



Europe. 



It is ^. carinatus, Wood, and Delphinula jjusilla, Phil. 



A. Angasi, a. Ad. PI. 30, figs. 98, 99. 



^[uch depressed, discoidal, thin, white, convexly flattened above, 

 whorls few, rapidly increasing, perijohery shar])ly carinated and 

 crenulated by radiating strong growth strite, which also crenulate 



