102 PROCEEDINGS OF THE ACADEMY OP [Feb., 



Columbella pardalina suboribraria n. subsp. PI. IV, fig. 23. 



Shell obesely fusiform, swollen in the middle; dark brown closely- 

 spotted with white, without a darker or otherwise differentiated sub- 

 sutural band. There are some spiral strise at the base, but the surface 

 is otherwise smooth. The aperture is narrow, sinuous, more than 

 half the length of the shell, the outer lip decidedly thickened within 

 in the middle, armed with about five tubercular or elongated teeth; 

 apex entire or nearly so. Whorls 7 to 7^. Length 11.5, diam. 5.5 

 mm. 



Hahajima, Ogasawara. Types No. 88,924, A. N. S. P., from No. 

 1,606 of Mr. Hirase's collection. 



This form has a superficial resemblance to C. cribraria, but the shape 

 of the aperture shows it to be related to C. pardalina japonica Rve. 

 ( + C. sagena Rve.). C. p. suhcrihraria is only about half the size of 

 its larger cousin, its aperture is slightly less contracted and the spots 

 are smaller, but otherwise the two forms do not differ materially. 

 Buooinum unicum n. sp. 



Shell solid but rather thin, ovate-conic, fleshy-whitish under a very 

 thin, smooth, dehiscent light olive cuticle. The last whorl has a strong 

 keel at the shoulder, above which the surface slopes up to the suture, 

 with a second obtuse keel a little nearer to the suture than to the first 

 keel. Below the shoulder keel the surface is at first slightly concave, 

 then evenly convex and rather swollen, contracting as usual below. 

 The whorls of the spu-e are terrace-like, and the last 4 at least are cari- 

 nated like the last whorl, those above being deeply eroded. Wliorls 

 6. The base is sculptured with strong spiral cords, gradually dimin- 

 ishing toward the periphery. Over the whole there is a minute sculp- 

 ture of fine spiral strise, beautifully crenulated by minute growth-strise. 

 The aperture is white within, outer lip simple and unexpanded. The 

 columellar margin is concave in the middle, straight below. The 

 anterior notch is moderately wide and deep. The inner lip is covered 

 with a white enamel, preceded by an eroded groove. 

 Length 58.5, diam. 32, length of aperture 31 mm. 

 Kisennuma, Rikuzen. Type No. 88,820, A. N. S. P., from No. 1,761 

 of Mr. Hirase's collection. 



This peculiar whelk has much resemblance in general figure to 

 Buccinum taphrium Dall, type of the section Sulcosinus. It is more 

 elongated than that, and differs further in the less spreading columellar 

 callous, the much less sinuous columella, the additional keel above the 

 shoulder, and in not having a channelled suture, though the upper keel, 

 in a more depressed shell, would define a channel. It seems to connect 

 Sulcosinus with the more normal forms of Buccinum. 



