306 CYLICHNA. 



aperture narrow, inner lip strongly plicate in front; outer lip sub- 

 arcuate. (Ad., 1. c., p. 152, no. 7). 



Mino-Sima, Japan, 63 fathoms- 



Most like C. rimata, but is more solid, longitudinally striated, and 

 wants the conspicuous umbilical fissure of that species. (Ad.). 



The name is preoccupied by Gould for another Japanese species, 

 but it is hardly worth while proposing another tor this species until 

 it can be properly redescribed and figured. 



C. PARALLELA A. Adams. Unfigured. 



Shell cylindrical, rimate, whitish, rather solid, striated at both 

 ends ; longitudinally strigose, last whorl parallel-sided. Aperture 

 linear produced anteriorly ; inner lip with a reflexed callus closing 

 the chink, outer lip straightened, posteriorly produced and 

 angulated. (Ad., I. c., p. 152, no. 8). 



Tsu-Sima, Japan, 16 fathoms. 



Most nearly resembles C. in-voluta A. Adams ; but the aperture is 

 produced and pointed anteriorly, the sides of the body-whorl are 

 nearly parallel, and the outer lip forms posteriorly a produced 

 angle. (Ad.). 



C. ASSIMILIS A. Adams. Unfigured. 



Shell cylindrical, dull white, solid, rather short, truncated behind, 

 dilated ; acuminate in front ; under a lens seen to be obsoletely 

 transversely striated throughout ; aperture linear, inner lip thick- 

 ened, the fold vanishing; outer lip with somewhat straightened 

 margin, posteriorly subproduced and rounded. (Ad., 1. c., p. 152, 

 No. 9). 



Mino-Sima, Japan, 63 fms. 



A small species, somewhat resembling C. involuta A. Adams, but 

 much shorter, dilated behind, narrowed in front, and with the hind 

 angle of the outer lip rounded. (Ad.). 



C. PUMILA A. Adams. Unfigured. 



Shell small, white, thin, ovate-cylindrical, subconstricted in the 

 middle, rounded at both ends, longitudinally substriate ; aperture a 

 little widened, the inner lip thin, arcuate, simple ; outer lip with the 

 margin inflexed in the middle. (Ad., 1. c., p. 153, No. 10). 



Tsu-Sima, Japan, 16 fms. 



