17 



at its median line, and a cusp consisting of a sharp tooth at the proximal side, and a wing-like 

 part on the distal side, with a slightly denticulate margin. Of the numerous uncini (U), the 

 proximal ones, which are the largest, have simple cusps, while those placed more outwards 

 have small denticles. 



This species may be at once distinguished from the next one, by its very characteristic 

 sculpture, it is a much higher shell; the radulae though being very similar in general construction, 

 are sufficiently distinct. 



2.- Psetidococculina grantilata n. sp. PI. I, fig. 3; PI. VIII, fig. 7. 



Stat. 88. o°34'.6N., ir9°8'.5E. 1301 M., grey and yellow mud. i Spec. 



Shell small, white, depressed, oval, very thin, broader towards the front, the ends slightly 

 raised, front and side-slopes slightly convex, posterior slope nearly straight, with a very small 

 impression below the nucleus, this latter smooth, compressed, subspiral, placed at a little more 

 than ^Aj of the total length of the shell. Sculpture consisting of a few concentric striae, moreover 

 the whole surface is covered by very small, crowded granules of an irregular oval, potatolike shape, 

 sometimes two or three granules are confluent, they are placed in oblique rows. Inside smooth. 



Long. 57„, lat. 31/3, alt. i Mill. 



The shell of this species, in every respect, save sculpture, calls in mind the species of 

 Cocculina. As the animal was not in a sufficient state of preservation, I could not observe the 

 external characters, but a look at the radula, shows at once that this species is congeneric with 

 the preceding one, and quite different from Cocculina. The rhachidian tooth (R) has an oblong 

 shape, with convex sides towards the middle, concave towards the top, with slightly reflected 

 margin, the upper margin without cusp, but irregularly convex; about the centre of this tooth, an 

 irregular spot seems to be thickened and slightly coloured (one could think, this is the cusp, were 

 it not that in the allied species, a similar spot stands quite near the base) the first lateral (i) 

 has a subtriangular shape, with a thickened or reflected upper margin, followed by three laterals, 

 (2, 3) of a shape simular to those of the preceding species, with a simple cusp, the outermost 

 lateral (5), is so much concealed by the large uncini, that its shape could not be traced, it seems 

 to have a simple cusp, without the sharp denticle of the preceding species. The proximal uncini 

 (U) are strongly hooked and simple, the median ones seem to be serrated and the exterior 

 one again simple. 



Fam. CoccuLiNiDAE Dall. 



Cocculina Dall. 



I. Cocculina sudquadi'ata n. sp. PL I, fig. 4; PI. VIII, fig. 8. 



Stat. 173. 3°27'.oS., i3i°o'.5E. 567 M., fine yellow grey mud. 3 Spec. 

 Shell large, white, patelliform, oblong, depressed, sides subparallel, the shell being slightly 

 broader behind, the ends are broadly rounded and slightly elevated, the anterior slope, which 



SIBOGA-EXrEDITIE XLIX' «. ' 3 



