128 TROCHOMORPHA. 



gave no information in regard to its station. Specimens sent to the 

 Godeffroy Museum in Hamburg were referred to T. swainsonii, a 

 Society Island species ; and examples sent to an English correspon- 

 dent were confounded with T. metcalfei Pfeiffer, a Philippine spe- 

 cies. It is probably the Helix ( Videna) planorbis, in " Dr. James 

 C. Cox's Exchange List," which he accredits to Kantavu. The T. 

 planorbis of Lesson was collected by that naturalist in New Guinea, 

 and differs from our shell in being smaller, mottled with olivaceous, 

 and in having only 5 whorls. A careful comparison with the 

 description of T. metcalfei has convinced me that it cannot be the 

 same as the Kantavu shell. T. swainsonii is smaller, thicker* 

 rougher, much more variable, and the positions of the lineations are 

 different. Its large size, depressed form, fragile texture, luteous 

 horn color with the chestnut-brown marginal lines, and large umbil- 

 icus, will readily separate it from any other Vitian species. (Gar- 

 rett,*) 



Kantavu Island, Viti Archipelago. 



Tr. kantavuensis GARRETT, P. Z. S., Lond., 1887, p. 177. 



My figure is drawn from a specimen from the author, kindly fur- 

 nished by Mr. John Ponsonby, of London. 



T. MORIO Tapparone Canefri. PI. 30, figs. 15, 16. 



Shell small, profoundly umbilicated, conic, carinated, rather solid, 

 obliquely irregularly striated, pale rufous-corneous ; spire convex- 

 conic, apex obtuse. Whorls 6, convex, separated by a deep suture, 

 slightly margined above ; last whorl carinated at the periphery, not 

 descending in front, a little compressed on the base. Aperture very 

 oblique, depressed-lunate ; peristome simple, acute ; margins distant, 

 and joined by a thin callus, basal and columellar margins somewhat 

 thickened. Alt. G, greater diam. 7, lesser 6 mill. (T. (7.) 



Ansus, Isl. of Jobi, Bay of Geelvink, New Guinea, 



T. (Nigritella) morio T. C., Ann. Mus. Civ. Genov. (2) iv, p. 126 

 bis, t. 1, f. 8, 9, 1887. 



This species resembles a miniature T. ternatana, but besides its 

 much smaller size it is distinguished by the relative rudeness of the 

 stride, the depth of the sutures and the largeness of the umbilicus. 



T. NIGRANS Smith. PL 30, figs. 29, 30, 31. 



Shell widely umbilicated, depressed- conoid, chestnut colored with 

 a pale hair line at the periphery and suture. Whorls 6, slightly 



