CADULUS-GADILA. 195 



mate. While quite slender, it is still somewhat stouter than C. aber- 

 rans; and C. fusiformis is less curved and less constricted at the aper- 

 ture. Our description and figures of this species and C. tolmiei are 

 from part of the original specimens, kindly transmitted by Dr. C. F. 

 Newcombe. Ball writes : 



" This shell, in some lights, appears to have longitudinal streaks 

 of more or less opaque white, but there is no development of longi- 

 tudinal sculpture. 



" The only other species described from this region is Cadulus 

 aberrans Whiteaves, which is larger and more arcuate. An appar- 

 ently undescribed species from the east coast of North America, 

 near Cape Hatteras, North Carolina, is very close to C. hepburni, 

 though the slight differences observable may be thought sufficient, 

 taking the habitat into consideration, to separate it specifically. I 

 have named the Columbian species in honor of the late James Hep- 

 burn, Esq., one of the earliest collectors of British Columbian mol- 

 lusks, and who is well known for his contributions to the herbaria 

 of European botanists." 



C. SINGAPORENSIS Sharp & Pilsbry, n. sp. PI. 36, figs. 30, 31. 



Shell small, very slender, closely striated obliquely with alternate 

 white and translucent bands, smooth and glossy on the larger part, 

 encircled by low, close wrinkles near the apex. Gradually increasing 

 from the apex to quite near the aperture, then contracting moder- 

 ately on all sides ; equator or point of greatest diameter, at about the 

 anterior ninth of the shell's length, the diameter there contained 

 about 7i times in the length. Tube faintly compressed vertically 

 throughout. Aperture not oblique, subcircular; anal orifice simple. 



Length 5'6 mill. ; diam. at aperture 0'56 x 0*6, at greatest 0'75 x 

 0*77, at apex 0'29 x 0'34 mill, (the antero-posterior dimensions in 

 each case given first). 



Singapore (Dr. S. Archer). 



Allied to C. dentalinus and its recent varieties panamensis and 

 acus, but smaller, less distinctly and for a shorter distance annulated, 

 not swollen near the larger end, etc. It is a very much smaller 

 shell than either C. hepburni, C. aberrans or C. fusiformis. 



C.(??) L^VIS (Brazier). 



Shell light amber-color, sometimes white, smooth, glossy, strongly 

 arched, half-moon shaped, basal margin pinched in about two lines 

 long, forming somewhat like a shoulder, then slightly ventricose, 



