49 



Whorls four, the early ones rounded but someAvhal angular above and 

 a little oompressed at the sides ; the sutures becoming more distinctly 

 impressed as the shell increases in size. In the last volution and in jDart 

 of the preceding one, the ujiper sutural edge is flattened, and forms a 

 blunted angle with the side, the suture itself being lightly channelled. 

 Below the narrow sutural shoulder the body whorl is flattened or slightly 

 concave above the middle ; beneath, or about tlie centre, it becomes mode- 

 rately ventricose, and then nan-ows suddenl}- to the base. The umbilicus 

 is completel}"- covei'ed, and this is partly due to a thickening of the colu- 

 mellar lip above. The aperture is rounded exteriorly, while on the 

 columellar side its outline is concave above and convex beloAV ; the base 

 seems to have been obtusely pointed. 



The surface ornamentation consists of minute, transverse, raised stria^, 

 Avhich are rather ii-regular, and show a tendency to become arranged ob- 

 scurely in bands. These transverse and crowded striations are crossed by 

 similar though much more distant revolving lines, whose disposition is 

 verj' variable. On the penultimate volution the decussation is extremely 

 minute, but it appears to cover the whole area. On the body whoi"l the 

 revolving stria^ seem always present at or near the shoulder, and gener- 

 ally, though not always, in the centre of the volution. In every case the 

 revolving stria> are much fainter than the transverse ones, and the former 

 are often obsolete. 



Total length of the largest specimen, rather more than nine lines from 

 the ajiex to the base ; height of body whorl about seven lines ; maximum 

 width of do., about six and-a-half lines. 



Seven specimens of this species were collected, two of which are mere 

 casts. Kone of them are quite perfect, although in two the characteristic 

 sculpture is well preserved, and the description is, accordingly, compiled 

 from a general average of the features shown by the whole collectively. 



PSEUDOMELANIA (?) (8p. Undt.) 



A fragment of a large spiral shell, consisting only of about two and a 

 half of the basal whorls, which may belong to this genus. The test is 

 partly preserved on the last two volutions, but it is absent on nearly the 

 whole of the upper whoi-l. Apart from the sutures, there are no spii-al 

 grooves on any part of the cast, and the shell is presumabl}^ therefore not 

 a Neriruea. The specimen is clearly part of an elongate, subulate shell, 

 with smooth or only faintlj- striated whorls, and with the sutures not very 

 deeply impressed. The volutions are much flattened, and the last one is 



