254 SCAPHANDER. 



S. JAPONICUS A. Adams. Unfigured. 



Shell ovate, elongate, narrowed behind, dull white, transversely 

 sulcate, the sulci rather closely puncticulate; spire concealed ; aper- 

 ture coarctate behind, dilated in front; inner lip thin; outer lip,, 

 produced and obtusely angled posteriorly, rounded in front, the mar- 

 gin regularly arcuate. (Ad., Ann. Mag. Nat. Hist. (3), ix, p. 156). 



Mino-Sima, Japan, 63 fms. 



The punctate striae are common to most of the species of this 

 genus. The present species nearly resembles S. lignarius in form, 

 but is much smaller (only half an inch long) ; it is also less ventri- 

 cose, and transverse grooves are puncticulate. (Ad.}. 



S. CUMINGII A. Adams. Unfigured. 



Shell oblong-ovate, constricted behind, whitish, transversely 

 obliquely sulcate, the sulci closely puncticulate ; aperture ample,, 

 strongly coarctate behind, dilated and slightly effuse in front ; inner 

 lip lengthened, subreflexed outwardly; lip produced and acutely 

 angled posteriorly ; hind margin inflexed, anteriorly creuulated. 



(Ad., I. c.,p. 156). 



Mino-Sima, 63 fms. 



Differs from S. japonicus, which it equals in size, in the last 

 whorl being posteriorly constricted, in the close- set oblique grooves, 

 in the narrowness of the last whorl, and in the acute hind angle of 

 the outer lip. (Ad.). 



S. ELONGATUS A. Adams. Unfigured. 



Shell thin, white, elongate-ovate, narrowed at both ends, trans- 

 versely sulcate, the sulci distant, punctate; aperture produced in 

 front and dilated, coarctate behind ; inner lip thin ; outer lip 

 with regularly arcuate margin. (Ad., 1. c., p. 157). 



Mino-Sima, Japan, 63 fms. 



This species is elongate and narrowed at both ends, and the punc- 

 tate grooves are wide apart. The spire of this and of all the other 

 species is " truncata umbilicata," or " occulta." (Ad.). 



S. SULCATINUS A. Adams. Unfigured. 



Shell elongate, somewhat solid, posteriorly narrowed, tawny, 

 shining, transversely sulcate, the sulci simple and distant ; aperture 

 coarctate posteriorly, dilated anteriorly ; inner lip simple ; outer lip 

 with regularly arcuate margin. (Ad., 1. c., p. 157). 



Korea Strait, 46 fms. 



