GRAPSOIDEA. 375 



G-. 2. GECARCINICUS, Edwards. Articulus maxillipedis extern! 4tus marginis 

 medio apicalis 3tii insitus. 



2. Maxittipedes externi la& Mantes. 



G. 3. CARDISOMA, Latr. Articulus maxillipedis externi 4tus apice 3tii externo 



insitus. 

 G.' 4. GECARCOIDEA, Edwards. Articulus maxillipedis externi 4tus marginis 



medio excavato apicalis 3tii insitus. 



SUBFAM. 2. GECARCININ^E. Articuli maxillipedis externi 4tus et se- 

 quentes 3tio celati. 



G. 1. GECARCINUS, Latr. 



SUBFAMILY I. UCAINJE. 



GENUS UCA, Leach. 

 UCA L^EVIS ? Edwards. 

 Valparaiso ? Rio Janeiro. 



The specimen here referred to the Icevis is a male. Length of cara- 

 pax, twenty-eight lines ; breadth, thirty-seven lines (greatest breadth 

 much anterior to middle). Legs of the second pair longest, and its 

 tarsus having a group of long hairs on the inner side towards apex. 

 Hands very unequal, the largest as long as breadth of carapax, short 

 spinous above and within, and fingers, carpus, and arm the same. 

 The spines have a translucent horny texture. 



GENUS CARDISOMA, Latreille. 



CARDISOMA OBESUM. 



Carapax obesus, undique convexus, lateribus antero-lateralibm valde 

 tumidis, lined elevatd angulove marginis omnino carentibus. Articulus 



