DEC APOD A. PORCELLANAD^E. 



ANOMOURA. 



GENUS MUNIDA. Leach. 



Generic Character. — External antenn(B with the second and 

 third joints equal, basal joint very large ; the terminal filament 

 long and slender. Internal antenna inserted beneath the eye- 

 stalks, nearly contiguous. Anterior feet long, slender, and some- 

 what filiform, spinous within and on the upper surface. Carapace 

 longer than it is broad, spinous at the margins ; the rostrum, 

 forming a long, slender, acute spine, with two smaller ones above 

 its base, each immediately above the inner angle of the orbit, and 

 a small spine behind each of these. Abdomen strongly furrowed 

 transversely, with two or more of the segments furnished with 

 small spines on the anterior margin ; terminal joint (or central 

 portion of the tail) nearly as broad at its extremity as at its 

 base. 



This genus was founded by Leach for the Galathea 

 rugosa of Fabricius, and, as it appears, upon sufficient 

 grounds. The general habit of the animal, the form of its 

 rostrum, and the length and slenderness of the hands, with 

 other characters, appeared to point out a very marked dis- 

 tinction between this and all other species of Galathea of 

 Fabricius. 



It, however, appears that no subsequent author followed 

 Leach in considering the generic distinction satisfactory 

 excepting Desmarest, who, however, merely, followed Leach 

 on this and other occasions. My own impressions, however, 



