1901.] NATURAL SCIEXCE.S OF PHILADELPIirA. 199 



TROOHID^. 

 Cantharidus ( Phasianotrochus ) Hirasei n. >!>. 



Shell ovate-pyramidal, solid, of a uniform olive or brownish- 

 olive color, or belted with numerous reddish spiral bands. Smooth 

 except for faint growth-lines above, the base scored by 5 or 6 nar- 

 row, spaced, concentric grooves, stronger near the axis. Spire 

 conic, whorls 6i, convex, the last subangular at the periphery, 

 convex beneath. Aperture oblique, brilliantly green inside, with 

 a dusky submarginal band, the edge pale; columella opaque white, 

 rounded ; the umbilical region imperforate or with a very minute 

 perforation. 



Alt. 10, diam. 6.5 to 7 mm. 



Hirado, Hizeu (Mr. Y. Hirase). 



This is a true Phasianotrochm, the first made known from 

 Japan, having the green nacre of the interior iridescent with the 

 characteristic splendor of the subgenus. The other species of this 

 division are from Australia and Tasmania. 



In one banded specimen the earliest three whorls are variegated 

 with pink and white, like a Phasianella, and assimilating to some 

 Australian species of Phasiaiiotrochu.s. 

 Cantharidus bisbalteatus n. sp. 



Shell elevated conic, imperforate or minutely rimate, glossy. 

 Encircled by a crimson or scarlet l^elt at the periphery and another 

 bordering the suture below, continuous or interrupted by white 

 streaks or spots, and roseate around the umbilical tract, the inter- 

 vening spaces somewhat olivaceous, with a few narrow spirals of 

 alternate blue or white and red-brown dots; two or three of these 

 spiral lines ascending the spire. Sculpture of slight growth-lines 

 and fainter or wholly obsolete fine spiral stria^ above, and about 

 6 fine-spaced grooves around the umbilical region, stronger toward 

 the middle. Spire conic, the apex acute ; whorls about (H, quite 

 convex, separated by an impressed suture, the last whorl subangu- 

 lar at the periphery, convex beneath. Aperture oblique, rounded- 

 rhombic, pearly and iridescent within, with green, or green and red 

 reflections; scarcely showing any appearance of sulcation. Co- 

 lumella white, concave above, somewhat straightened in the 

 middle ; columellar area excavated, white. 



Alt. 12.5, diam. 8.5 to 9 mm. 



Hirado, Hizen (Mr. Y. Hirase). 



