412 FUNAFUTI ATOLL. 



last half whorl rise into sharp varices; on the latter three whorls 

 several weak spiral threads reticulate the transverse growth lines 

 and create angles below the suture and the periphery. Aperture 

 very oblique, lip sharp, sinuous, reflected, effuse anteriorly, 

 columella broad, arched, and reflected over a minute perforation. 

 Length 11, breadth 6| mm. 



This species in size and general shape approaches S. eburneus, 

 Deshayes. But in the produced and effuse aperture it recedes from 

 that towards S. crotaphis, Watson. A single specimen was pro- 

 cured at Funafuti. 



ODOSTOMIA BULIMOIDES, Souverbic. 

 Tryon, op. cit., p. 362, pi. Ixxix., fig. 69. 



Several specimens which appear to be the young of this species 

 from the lagoon beach. 



Described by Souverbie from New Caledonia and reported by 

 Melvill and Standen from Lifu. 



ODOSTOMIA RUBEA, Pease. 

 Tryon, op. cit., p. 363, pi. Ixxix., fig. 75. 



One living example from the lagoon. Pease procured the type 

 from the Paumotus. 



PYRAMIDELLA DOLABRATA, var. TEREBELLOIDES, A. Adams. 

 Tryon, op. cit., p. 300, pi. Ixxii., fig. 74. 



Two dead shells from the lagoon. There are specimens of this 

 in the Museum from Hawaii, under the name of Obeliscus sul- 

 catus, Nuttall. 



PYRAMIDELLA TURRITA, A. Adams. 

 Tryon, op. cit., p. 301, pi. Ixxii., figs. 84, 85. 



A few dead shell from the lagoon beach. Tryon records this 

 from New Caledonia. 



In these two latter species, aged or adult individuals develop 

 plicae within the lip, a fact omitted in monographs. 



PYRAMIDELLA MITRALIS, A. Adams. 

 Tryon, op. cit., p. 305, pi. Ixxiii., figs. 2, 3, 94, 97. 



Two dead shells from the lagoon beach. Tryon quotes this 

 from Tahiti; Melvill and Standen from Lifu. In this Museum it 

 it represented from Guam, New Caledonia, and Lord Howe Island. 



OBTORTIO, gen. nov. 



A shell of the Turbonillidae, small, conical. Apex of two minute 

 discoidal whorls, half buried in a larger and longitudinally ribbed 

 whorl, to which succeeds a ribbed and tabulate whorl ; these 



