334 HISTORY OF BRITISH CRUSTACEA. 



and horny; the body of the thorax swollen in the middle, 

 and twisted on itself like the letter S. 



Gills of the cod : found in Ireland, in Belfast and Dublin 

 Bays. 



SUPPLEMENT. 



Dr. J. R. Kinahan* has lately described a strikingly dis- 

 tinct species of Crangon as the 



Crangon Allmanni, Kinahan. Channel-tailed Shrimp. 

 — Carapace smooth, excepting a small spine on the median 

 line of the gastric region, and one on each branchial ; second 

 pair of legs as long as third; sixth segment of abdomen 

 deeply channelled above; channel continued as a shallow 

 groove on terminal segment ; third joint of anterior pair of 

 legs spined ; a minute spine between the insertion of second 

 pair of legs in males ; in the female, spine obsolete. Length 

 from one inch and a half to three inches. It is of a bluish- 

 grey colour, dotted over with brown, red, and gold. 



Pound by Dr. Kinahan in the coralline zone of the Irish 



* Proceedings of the Dublin Natural History Society, vol. iv. p. 81. 



