Zoological Society. 381 
horns are partially contracted, and the mouth of the animal is applied 
closely to the shell, and is seen to be alternately expanded and con- 
tracted, as if in the act of suction. In fact the whole process closely 
resembles the action of a cat when licking its feet and body, and is 
performed with just the same appearance of systematic determination. 
The object of this operation is no doubt the same in both animals,— 
that of clearing their persons from extraneous matter, and producing 
that aspect of cleanliness and beauty which is one of the laws of or- 
ganic nature in its normal state. Hence that brilliant gloss which 
distinguishes the shell of the mollusk here referred to. 
It would be desirable to ascertain whether any analogous habit is 
possessed by the allied genera Vitrina and Zonites. ‘The shells of 
the British species of Zonites (Z. nitens, alliacea, cellaria, &c.) closely 
resemble Nanina vitrinoides in form, colour, and glossiness of surface, 
and their brilliancy must apparently be due to some polishing action 
similar to that here described. On the other hand, it is difficult to 
understand how the animals of Zonites and Vitrina, whose foot is 
much broader and shorter than in Nanina, should be able to reach 
every part of their shell and to purify its surface. 
The animal of Nanina vitrinoides is of a deep cinereous, the mantle 
yellowish, its lateral projecting lobes darker, the under surface of the 
foot pale grey, with a yellowish stripe along each side. 
2. DescrIPTION OF TWO NEW SPECIES OF Crustacea. By Abam 
Wairs, F.L.S., Assistant Zoou. Derr. Brit. Mus. 
Cancer (GALENE) DorsALis, White, n.s.  C. pallide carneus he- 
patico-rubris punctulis confertim sparsus, thorace maculd magnd 
hepaticd dorsali, medid, antice angulatd, postice rotundatd ; thorace 
parte posticd dimidiatd immaculatd ; pedibus carneolo-suaviter 
variegatis ; pedibus penultimis longissimis ; chelis magnis, pallidis, 
superne punctulis hepatice sparsis, subtus et infra immaculatis ; 
fronte pland, medio duobus tuberculis, thorace, lateribus ante- 
rioribus, tuberculis quatuor minime elevatis. 
This singularly pretty species was sent home by Mr. John Mac- 
Gillivray, the naturalist attached to Capt. Stanley’s expedition: its 
beautiful dotted surface, the large liver-coloured mark on the middle 
of its carapace, and the great length of the penultimate pair of legs, 
as well as its semi-nodose, semi-crenate, latero-anterior edge, well 
determine it. 
SQUILLA MULTICARINATA, White, List of Crustacea Brit. Mus. 
S. thorace, et segmentis abdominalibus, multis carinis, sepe paral- 
lelis, carind singuld, postice producta in spinam brevem ; ordinibus 
duobus carinarum utriusque lateris, pauld majoribus. 
This species comes in the second section of M. Edwards, and in 
his first subsection of it, in which the rostral plate does not cover the 
ophthalmic ring: the very numerous nearly parallel crests on each 
segment of carapace and abdomen, each crest produced slightly 
behind into a spine, at once indicate its distinctness from all Squille 
with the description of which I am familiar. ‘Two specimens were 
