404 
CRUSTACEA. 
S. Prideauxiana, 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. curtum (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. Griffithsii, 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 Cymodocea. 
C. truncata, 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 NES2EA. 
N. bidentata , Desm. 
“ North of Ireland.” Templeton. 
Genus Cirolana. 
C. hirtipes, 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 batis ) 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 ( Hippoglossus ), 
from the last-named locality. It was enumerated in my Report under the 
name of Cirolana Cranchii, the only known British form of the genus. 
