TflK NAUTILUS. 19 



hitherto referred to Stenogyru, and B. turritus Gude, described as 

 Ganesella, thougli Mr. Gude suggests that it may be a Buliminopsis. 

 Although I formerly thought turrita a Ganesella, the sculpture of 

 fresh specimens is so similar to Buliminopsis that I liave now little 

 doubt that Glide's surmise was correct. It resembles the Chinese 

 B. buliminoides Hde. in shape, but the latter, from a specimen re- 

 ceived from Pere Heude, is narrower and less acutely keeled. Dr. 

 Fritz Wiegmann lias recently shown that Buliminopsis has essen- 

 tially the organization of the genus Eulota, and therein is perhaps 

 nearest to Cathaica. His investigations show that there are no im- 

 portant anatomical differences between the numerous subgenera 

 which I have subordinated to Eulota. The characters intergrade by 

 easy stages. Even Buliminopsis is anatomically an Eulota. 



At Shunashiri, Loo Choo group, a form of Eulota ( Plectotropis") 

 scepasma Pfr. occurred, having G^ whorls and a more depressed con- 

 tour, being thus more acutely carinate. It measures, alt. 10^, diam. 

 21 mm., and is densely covered, like the typical form, with short, 

 triangular, cuticular scales. Plectotropis pachysoma Ehrmann, is 

 evidently a synonym of typical E. scepasma. 



Trishoplita collinsoni var. casta nov. S hell rather openly umbili- 

 cate, depressed, with conic spire; white with a brown line at the 

 periphery, showing above the suture on the spire. Surface shining, 

 minutely striate, rather faintly decussate beneath, microscopically 

 papillose. Whorls G, slowly widening, the last very obsoletely an- 

 gular at the periphery, becoming rounded towards the aperture, con- 

 vex beneath. Aperture oblique, shortly oval, slightly lunate, the 

 penultimate whorl excising a segment of about one-fourth the cir- 

 cumference of the peristome; lip white, narrowly expanded above, 

 the outer and basal margins reflexed. 



Alt. 8.G, diam. 12.5; length of aperture 5.5, width 6.3 mm. 



Alt. 10, diam. 12; length of aperture 6, width 7 mm. 



Obi, Prov. Hyuga, in eastern Kiushiu (Mr. Y. Hirase). 



This species is somewhat more conical than T. tosana Gude, 1 with 

 an umbilicus of about the same width or a little smaller. It has 

 about the form but not the coloration of T. cretacea var. bipartila, 

 and is apparently allied to T. collinsoni (A. Ad.) and T. lischkeana 

 (Kob.), both of which have similar coloration. T. collinsoni was de- 

 scribed from " Tago," which I take to be Tako, a place at the west- 



1 The name tosana Gude has three days priority over suprazonata Pilsbry. 



