54 



CANCERILKi;. 



DEC A POD A. 



RRACHYVRA. 



CANCER] D.I. . 



Xantho rivulosa. 



Specific character. Carapace nearly horizontal ; latero-anterior margin with 

 four triangular teeth ; fingers brown, the rnoveaLle one grooved above ; the second 

 to the fifth pairs of legs with all the joints ciliated on the upper edge. 



Cancer hydrophilus, 

 Xantho JJorida, var. ;8, 

 rivulosus, 



HERBST, I. t. xxi. f. 124. p. 266. 

 LEACH, Trans. Linn. Soc. XI. p. 320. 

 EDVVARDS, Hist. Crust. I. p. 394. Roux, Crust. 

 Mediterr t. xxxv. COUCH, Cornish Fauna. 



THIS species exceedingly resembles X.florida, and lias 

 been doubtless often confounded with it. There are, how- 

 ever, numerous well marked distinctive characters, as the 

 following description will show on a comparison with that 

 of the former. 



The carapace is nearly horizontal, the anterior portion 



