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 65 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, Sowverbie. 
Tryon, op. cit., p. 362, pl. lxxix., 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 RUBRA, Pease. 
Tryon, op. cvt., p. 363, pl. 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, pl. 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, pl. Ixxii., figs. 84, 85. 
A few dead shell from the Jagoon beach. Tryon records this 
from New Caledonia. 
In these two latter species, aged or adult individuals develop 
plicee within the lip, a fact omitted in monographs. 
PYRAMIDELLA MITRALIS, A. Adams, 
Tryon, op. cit., p. 305, pl. 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 Turbonillid, 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 
