1905.J NATURAL SCIENCES OF PHILADELPHIA. 105 



bands of the shell, and the microscopic vertical lineolation discernible 

 in places on U. gouldii are in favor of this classification, while the form 

 of the shell and the other characters of the aperture remind one more 

 of Pisania or Tritonidea in the Buccinidce. Until the dentition can 

 be examined, the position of Usilla must be left in doubt. 



U. gouldii is a larger and rougher species than U. f usee nigra, with 

 the spire much more strongly sculptured. No other species are known 

 to belong to the group. 



Columbella liocyma Pils. 



Described in these Proceedings, 1894, p. 14. The locality, Hachijo, 

 Izu, was omitted. 



Planaxis abbreviata ogasawarana n. subsp. PI. Ill, figs. 18, 19. 



The shell is larger and longer than P. abbreviata Pease, ovate-conic, 

 thick and solid, chocolate-brown, the last whorl covered with a dull 

 fibrous cuticle. Sculpture of spiral grooves, often weak in the middle 

 of the last whorl, strong below the suture and at the base. Whorls 

 about 6, convex. Aperture obhque, the outer lip thickened within, 

 and bearing 11 to 14 lirse, which extend into the throat; basal and pos- 

 terior notches small, deep and rounded. 



Length 13, diam. 7.7 mm. 



Length 12, diam. 7 mm. 



Hahajima, Ogasawara. Types No. 87,769, A. N. S. P., from No. 

 1,629 of Mr. Hirase's collection. 



This is a more robust form than P. nigra, with lirse in the throat like 

 the Polynesian P. abbreviata. 



Natioa (Haloconcha) hirasei n. sp. PI. II, figs. 5, 6. 



Shell wholly imperforate, similar in shape to N. clausa B. and S. 

 Brown-tinged white, with two chocolate-brown bands, which are more 

 or less interrupted into spots or oblique streaks, one in the middle of the 

 upper surface and ascending upon the penultimate whorl, the other 

 immediately below the periphery. The surface is rather dull, marked 

 with growth-lines, and showing faint, fine, subobsolete spiral striae. 

 Whorls 4^, convex, the spire very small. The aperture is oblique, 

 half-round and chestnut colored inside, with a pale entering basal band 

 and wide white lip-margin. The umbilical pad is small, semicircular, 

 bounded by a furrow, and separated from the parietal callous by a rather 

 large notch. 



Length 17, diam. 15 mm., operculum 10 x 6.7 mm. 



Length 15.5, diam. 14.5 mm. 



The operculum (fig. 5) is ovate, slightly concave and white exter- 



