404 CRUSTACEA. 



S. Prideauxinna, Leach. 



An example of this species, taken in a towing-net where the water was 

 several fathoms in depth in Belfast Bay in August, 1846, by Mr. R. Pat- 

 terson, was brought to me alive. Its colour was pale brown with dark 

 brown markings ; its motions when undisturbed were lively ; when 

 touched, it rolled itself into a ball. 



My specimen, which on comparison with the original one from " De- 

 von " (where only it has yet been noticed) in the British Museum, must 

 be considered this species, at the same time cannot be said to differ from 

 S. curtnm (a view in which Mr. Adam White coincides) ; — it is interme- 

 diate in size, form, &c., between the individual examples of the two spe- 

 cies in that collection. M. Edwards offers some remarks on the diffi- 

 culty of distinguishing S. curtum from Leach's description (Hist. Crust., 

 vol iii. p. 209). 



S. Griffitlmi, Leach MSS. ? Brit. Museum Catal., p. 103. 



Three Sphceromce obtained in Belfast Bay and Strangford Lough 

 (1835, &c.) are similar to the two poor original specimens from Torbay, 

 so named in the British Museum, excepting in the caudal plate being 

 rather more rounded in my specimens. 



Genus Ctmodocea. 



C. trimcata, Mont. (sp.). 



Two examples procured between tide-marks at Cultra and Rockport, 

 Belfast Bay, Mr. Hyndman and W. T., 1837. Leach remarks that the 

 species is found amongst Fuci, and is very rare: Edin. Ency., vii. 433. 

 Mine agree with his specimen in the British Museum ; it is from Devon 

 (the only known locality). 



Genus Dynamena. 



D. rubra, Leach. 



This species was determined from comparison with Dr. Leach's spe- 

 cimens in the British Museum. — Not uncommon on the North-East coast. 



Genus Nes.^a. 

 N. bidentata, Desm. 

 " North of Ireland." Templeton. 



Genus CiROLANA. 

 C.lm'tipes, Edw. 

 My specimens are similar to those so named in the British Museum 

 (but whence these were obtained is unknown), and agree with the descrip- 

 tion and figure of M. Edwards, whose only locality indicated for the spe- 

 cies is the Cape of Good Hope ! The first individuals which came under 

 my notice were found in the midst of a mass of boiled cod-fish ova 

 sent me from Portpatrick about ten years since, by Lieut. Little, R. N. In 

 September, 1841, several found adhering to a skate [Raia hatis) taken in 

 Belfast Bay, were brought to me by Mr. Hyndman. I have also procured 

 it on the gills, and once alive in the stomach of a holibut {Hi2)pof/lossus), 

 from the last-namecl locality. It was enumerated in my Report under the 

 name of Cirolana Cranchii, the only known British form of the genus. 



