58 GENUS CANCER. 



notched at the apex internally, for the reception of th€ 

 following joint: all the feet formed for walking. 



SPECIES. 



i.e. Fan ope. Thorax with about three serrate teeth 

 each side, clypeus porrect, truncate, with a deep fissure, 

 anterior feet glabrous, carpus with a thick spine, hands 

 large, subunequal, fingers black. 

 Cancer Panope ? Rets's C} clop. 

 Inhabits oyster beds, &c. common, 

 Fiate 4^ fig. 3. 



Thorax laterally, and on the edge, granulated; three 

 lateral, serrate tecih, and a more or less definite obtuse 

 one, near the posterior canthus of the eye; superior eye- 

 lid with two fissures, and a tooth or prominent angle each 

 side, inferior lid ciliate within and with a more prominent 

 tooth near the middle, middle as in the upper lid occu- 

 pied by a sinus; anterior feet mmutely granulated, hands 

 rounded above and beneath, finger perceptibly deflected, 

 and with the thumb strongly toothed within, and black- 

 brown, with impressed striae; terminal joint of the ab- 

 domen not abruptly straitened, rounded at tip; the 

 interior antennae are comose instead of the larger termi- 

 nal articulated seta. 



Length one inch and one tenth, breadth one inch and 

 a half. 



The young of this species are ofteji found on oys- 

 ters, (0. virginica) in our markets, secretmg themselves 

 about the hnige ot" such as are not perfectly divested of the 

 mud in which they had been imbedded. They differ a 

 little in appearance in the different siages of their growth; 

 when very young the cleft in the middle of the clypeus 

 is hardly perceptible, but it gradually deepens with age^ 



