SCAPHANDER. 253 



scarcely appreciable. Besides these, the upper half of the shell and 

 the point of the base are scratched with fine square-cut striae, which, 

 with a little difRcult}^ can be recognized as formed of minute con- 

 tiguous stijiplings ; these are very remote in the middle of the shell, 

 but toward either extremity they become crowded. Epidermis 

 membranaceous. Colour white, with a faint ivory tinge. Crown 

 consists only of the flatly rounded margin of a very small pit-like 

 depression in front of the origin of tlie outer lip, which rises abruptly 

 above the top of the shell. Mouth curved, rather club than pear- 

 shaped, being gibbously enlarged in front and elongate and rather 

 narrow behind. Outer lip thickened, leflected, and sinuated above, 

 where curving forwards, it rises in a tooth-like form above the 

 crown ; from this point it sweeps very equably round to the point of 

 the pillar, the curve being very slightly flattened above and some- 

 what full on the base; it is patulous throughout ; the very thin edge 

 is nowhere very prominent. Inner lip roundly convex on the body, 

 bluntly angulated at the top of the short scarcely curved and barely 

 truncate pillar. A thickish and rather prominent glaze joins the 

 two extremities of the outer lip ; near its edge on the upper part of 

 the body this glaze has a few irregular rounded tubercles; on the 

 base, where it is thickened to a pad, these tubercles increase in size 

 and number, while the reverted pillar-lip is harshly covered with 

 them. The pillar lip is not quite closely appressed, having an over- 

 hanging edge and a closed chink behind it. Alt. 1*15, diam. 0*8. 

 ■Greatest breadth of mouth, 0'56 inch. (^Wats.). 



South-east of the Philippines, 500 fms. 



S. nivevs Wats., J. L. S. Lond. xvii, p. 343 ; Chall. Rep., p. 644, 

 pi. 48, f. 3. 



Only one specimen of this species having been found, it is im- 

 possible to say whether the rougheuingof the labial glaze is a specific 

 feature as in some of the Volutes, or the result of disease. In this 

 species the general form of the shell, and especially that of the liody- 

 whorlis even liker a Bulla than is the case with Scaphatider jnmdo- 

 striatiis (Migh) ; but the apex is not perforated. As in that species 

 one, looking up the pillar, can only see a single complete whoil. 

 The minute stippling of the spirals resembles, on a still smaller scale, 

 that feature in Scaphander lignarms (linne). Compared to Scaph- 

 ander viundus Watson, this is a much more tumid form, and the 

 sculpture is markedly different. (Wats.). 



