1226 



CRUSTACEA. 



CORYC^EUS PRODUCTUS. 



Antennae, anticce 5-7 -articulates, brevissime setulosae. Antennarum posti- 

 carum articulus 2dus ad apicem acutus et digitus brevis forsan Z-arti- 

 culatus. Abdomen elongatum, versus basin crasdus ad apicem oblique 

 non truncatum. Styli caudales fere dimidio breviores, setis stylo paulo 

 longioribus. 



Anterior antennae five- to seven-jointed, setae short. Second joint of 

 posterior antennae acute at apex, finger short, probably three-jointed. 

 Abdomen long, half as long as cephalothorax, stoutest near base, 

 not obliquely truncate at apex. Caudal stylets nearly one-half 

 shorter, setae a little longer than the stylets. 



Plate 86, fig. 8 a, animal, enlarged; b, natatory of third or fourth 

 pair. 



Atlantic, latitude 8° 35' north, longitude 23° 40' west, October 15, 

 1838. 



Length, one-thirtieth of an inch. Colourless, or a light tinge of 

 blue, with brown along the venter. 



In a lateral view, the abdomen abruptly enlarges below, very near 

 the basal articulation ; from this part the under side is straight, while 

 the upper has a slight slope and curve, the abdomen gradually dimi- 

 nishing in height. The conspicilla are large, but it is not stated m 

 my notes whether they are in contact or not. 



The posterior natatories the smallest; the branches three-jointed. 



The claw or finger of the posterior antennae appeared to have two 

 short basal joints ; but it is possible that the existence of one or two 

 short spines may have led to a mistake with regard to one of the arti- 

 culations. 



CORYCJEUS LONGICAUDIS. 



Cephalothorax mediocris, segmento quarto elongate* acuto. Conspicilla jere^ 

 contigua. Antennae anticaa 7-articulatce, setis longiusculis, antenna 



