CANCERIDJS. 



DEC A POD A. 

 BRACHYURA. 



Xaniho rivulosa. 



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

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

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



Cancer hydrophttus, 

 Xaniho florida, var. j8, 

 rivulosus. 



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

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

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

 Mediterr. t, xxxv. COUCH, Cornish Fauna. 



THIS species exceedingly resembles X.florida, and has 

 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 



