CRUSTACEA. 



75 



"Rare. Mr. Couch, says that this is the only species that he 

 has met with, and Dr. M. Edwards thinks that the others named 

 are only varieties. The other two are in the Athenoeum at 

 Plymouth." 



It has been taken at Scarborough, and is rare in Ireland. 



Ebalia cranchii — Oranch's Ebalia. — Leach, Malae., p. 25 ; Milne 

 Edwards Hist, des Crust., vol. ii, p. 129. 



Bell says, " The male of this species so nearly resembles that 

 of E. bryerii that without careful examination they may readily 

 be mistaken for each other. The principal distinctive charac- 

 ters are to be found in the form and proportions of the antennae, 

 and the size of the granulations on the surface." 



This is the most rare of the British species of Ebalia. It was 

 discovered by the indefatigable and unfortunate Mr. Cranch in 

 Plymouth Sound, where, according to Leach, it was afterwards 

 observed in considerable numbers. 



Ebalia pennantii — Pennant's Ebalia. — Leach, Malac. Brit., pi. 

 25 ; Milne Edwards, Hist, des Crust., vol. 2, p. 129 ; Pennant, 

 pi. 9,fy. 19. 



This species ranges from Shetland to the coast of Cornwall. 



Gtenus, Atelecyclus. — Leach. 

 "Carapace large, circular, arched anteriorly, more contracted 

 behind. Cavities of the eyes longitudinal, front denticulated." 



Atelecycltjs heterodox — Circular Crab. — Leach, Malac. Brit., 

 t ii; Milne Edwards, LList. des Crust., t 2, p. 143. 



" Common in the stomachs of fishes, chiefly Cod fishes and 

 common Pays, from the depth of 20 to 50 fathoms. They must 

 abound at these depths, as I have found more than thirty in a 

 single fish, and almost every Pay opened for several days in suc- 

 cession was found to contain them." 



It has been recorded from the north of Scotland, and on the 

 Irish coast. 



Genus, Corystes. 

 Carapace longer than broad, and in shape approaching an 

 elipse. Outer antennae very long, and inserted in a cavity of 

 the orbitary foramen. 



Corystes cassivelaunus — Long Crab — Couch. — Masked Cm b — 

 Bell. Leach, Malac. Brit., p. 1. 



