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 Adam 

 White, F.L.S., Assistant Zool. Dept. Brit. Mus. 



Cancer (Galene) dorsalis, White, n. s. C. pallide carneus he- 



patico-rubris punctulis confertim spa?*sus, 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 hepaticce 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, scEpe paral- 



lelis, carind singuld, postice productd in spinam brevem ; ordinibus 



duobus carinarum utriusque lateris, paulb majoribvs. 



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 Squillce 



with the description of which I am familiar. Two specimens were 



