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ACCOUNT OF THE CEUSTACEA. 



BY 



THOMAS BELL, ESQ., V.P.R.S., 



PRESIDENT OF THE LINNEAN SOCIETY. 



THE collection of Crustacea brought by Captain Sir Edward 

 Belcher is not very numerous, but there are a few new species, 

 besides some interesting ones which have been described by 

 former naturalists. The specimens were all obtained by the 

 dredge between Beechey Island and Northumberland Sound, 

 and generally in depths exceeding thirty fathoms. 



I have found it necessary in some instances to revise the 

 specific characters given by former writers. 



DECAPODA MACRURA. 



HIPPOLYTE BOREALIS (Owen). 



Thorace cylindraceo, antice subcarinato, angulo antico-inferiore mutico, 

 caudse lamina media spinis minutis 16 ad 20 aiinatis. 



Hippolyte borealis, Owen, in Append, to Captain Sir John Ross's Voy- 

 age, p. Ixxxiv. t. B. f. 3 ; Edw. Hist. Nat, des Crust, ii. p. 373. 



It was very truly observed by Colonel Sabine, in his account 

 of the Crustacea obtained in Parry's voyage, that the number 

 of teeth on the rostrum in the different species of Hippolyte 

 is no good criterion of specific distinction, and this is particu- 

 larly true of the present species. The rostrum is straight, iu 

 some individuals with, in some without, an inferior carina ; 



