DIFFERS FROM P. BELLIANUS. 277 



another very considerably, and are furnished 

 with short, sharp, and slightly-curved dactyli. 

 The fifth pair of pereiopoda are rudimentary ap- 

 pendages; they consist of but five joints, the last 

 of which terminates in a blunt extremity, that is 

 furnished with a considerable brush of hair, and 

 is probably used for the purpose of cleansing the 

 branchial appendages. 



The pleopoda are present in the female, with 

 the exception of the first pair (which are small), 

 only upon the left side of the pleon, as exempli- 

 fied in our specimen. 



This species differs from White's P, bellianus 

 in having a horizontal bifurcate rostrum to the 

 carapace, being more distinctly tuberculated, and 

 in the pereiopoda being more strongly spinated. 



This handsome species is of a yellow colour, 

 picked out with purple between the tubercles. 



It was dredged in Esquimalt Harbour, in ten 

 fathoms of water. 



ECHIDXOCERUS CIBARIUS (WHITE). Victoria and Esqui- 

 malt Harbour. 



PORCELLANA EDWARDSII (DESAUSURE). Esquimalt 

 Harbour. M. Verreaux obtained it at Magellan. 



PORCELLAXA EUPICOLA (Simi-sox). Esquimalt Harbour. 



Mr. Stimpson says that the members of this 

 remarkable genus are the largest crabs known : 



