Mr. C. Spence Bate on some British Diastylidse. 273 



this lengthened and devious line. Mr. Blanford states that he 

 had met with a single specimen of H. Castra in the hills S.AV. of 

 Balasore in Orissa, and I'emarks that no other instance has oc- 

 curred of the detection of a Sikkim shell in the tract to the 

 south of the Ganges. 



Cheltenham, February 19, 1859. 



Note. — There being already a Helix Catinus, Pfr., Mai. Blatter, 

 1856, the name conferred on the Moulmein shell (No. 4 of the 

 memoir contained in the 'Annals^ for March 1859, page 185) 

 must be altered. I now designate the species as Helix Cy- 

 claspis, B. 



March 12, 1859. 



XXIX. — On some British Diastylidse. 

 By C. Spence Bate, Esq. 



Among a very interesting batch of Crustacea recently sent to me 

 by Mr. Robertson of Glasgow, the following appear of especial 

 interest : — 



Bodotria arenosa, Goodsir. This specimen enables me to 

 verify the general correctness of the author's figure, which, from 

 want of examples, I was not able to do in my paper on the British 

 Diastylidje in the 'Ann. and Mag. of Nat. Hist.' for June 1856. 



Cuma Edwardsii, Kroyer. This enables me to confirm the 

 doubt expressed in that paper as to its being a Cuma. There 

 are five segments of the pereion exposed behind the carapace, 

 and the posterior pair of pleopoda have both their terminal rami 

 double-articulated. In both these conditions it agrees with the 

 genus Vdunthomsonia, recently described by me in the ' Natural 

 History Review,' to which for the future we must consider 

 C. Edwardsii to belong. 



Cuma unguiculata, n. sp. 



I have not yet had an opportunity of dissecting a specimen of 

 the typical species of Cuma; but, assuming Goodsir's descrip- 

 tion to be correct, the present species appears to belong to 

 that genus. The pair of antenna have two articulations, and 

 terminate in two or three long hairs. The gnathopoda and 

 pereiopoda terminate in a long, curved, nail- like dactylos. The 

 posterior pair of pleopoda have their peduncle very short, and the 

 rami unequal, each terminating in a long fine hair, the internal 

 longer and stouter than the external, and armed on the internal 

 margin near the middle with two or three short teeth. 



Ann. ^ Mag. N. Hist. Ser. 3. Vol.'m. 18 



