126 Transactions. 
protoconch of about two whorls, nucleus lost, distinctly carinated and with 
spiral striae only, succeeding whorl with three spiral threadlets and broad 
rounded axial ribs, the latter nine on a whorl, wider than the interspaces, 
obsolete on base; of spirals there are about twenty on the last, smaller 
towards beak and with a minute thread in grooves, on penultimate whorl 
there are eight spirals excluding threadlets in grooves, the thread margining 
suture rather prominent and in places a minute thread above it. Aperture 
small, narrowly oval, posterior sinus not deep, lip simple, columella almost 
straight, callused, and tapering to beak, which is slightly twisted forward. 
Length, 10 mm. ; width, 3-25 mm. ; length of aperture and canal, 4 mm. 
Locality: Waikopiro. (Suter collection.) 
Type in Wanganui Museum. 
A single specimen only. The late Mr. Suter has it marked “ р. sp." 
Bathytoma transenna Sut. (Plate 12, fig. 1.) 
Leucosyrinz altus Harris subsp. transenna Sut., N.Z. Geol. Surv. Pal. 
Bull p. 44. 
proved that it also is a Bathytoma and has no relationship with L. altus 
Harris. Other specimens in the collection are two from Petane, similar 
The above refers to the holotype from Awamoa. Specimens from 
Pukeuri and Petane have an extra spiral on the shoulder, and frequently 
the larger thread below the suture is split into two. 
The species is allied to B. albula Hutt., examples of which from White 
Rock River most nearly approach it, and might almost be regarded as a 
transition form. 
Surcula protransenna n. sp. (Plate 12, fig. 6.) - 
Shell small, narrowly fusiform, spire turreted, whorls seven or eight, à 
strongly projecting rounded keel at middle on spire-whorls, concave above 
and below, on the last whorl a well-marked concave area below keel followed 
by a second keel less pronounced, anterior to this rather abruptly contracted ; 
aperture and canal slightly longer than spire. Protoconch of about one 
. indistinct in some specimens, on the last whorl usually more pronounced ; 
