1060 



CRUSTACEA. 



and following organs are short. The animals move through the 

 water with a very rapid darting motion. 



Calantts scutellatus. 



Lath depressus. Cephalothorax A-articulatus, segmento antico antice forte 

 arcuato, posticd lathproducto et acuto, segmento postico utrinque elongate 

 acuto, et divaricate. Antennae anticce corpore paululo longiores, duplo 

 curvatoe, apicibus f route vix anterioribus, articido apicali longiore; 

 setis brevibus, apicali anticd penultimdque posticd articuli longitudine, 

 aliis subapicalibus perbrevibus. Abdomen 2>-articulatum. Styli can- 

 dales tenues, fere abdominis longitudine, parch divaricate 



Body much depressed and broad. Cephalothorax four-jointed, rounded 

 in front; anterior segment scutellate, with the sides broadly pro- 

 duced posteriorly, and acute behind, last segment acutely and diva- 

 ricately prolonged behind. Anterior antennas a little longer than 

 the body, doubly curved, tips about in line of beak ; apical joint 

 longer than preceding ; setae rather short, anterior apical and poste- 

 rior penult as long as the joint to which attached, the other sub- 

 apical very short. Abdomen three-jointed. Caudal stylets slender, 

 nearly as long as abdomen, somewhat divaricate. 



Plate 72, fig. 11a, animal, enlarged ; b, extremity of antenna. 



Collected in the Sooloo Sea, east of Panay, January 27, 1842. 



Length, one-sixteenth of an inch. Colourless, except a faint yel- 

 lowish tint, and red about the mouth and in part of thorax. The legs 

 scarcely project beyond the shield-like anterior segment. The form 

 of this segment is nearly that of a half ellipse, with the angles lamel- 

 larly prolonged behind and acute ; the length and breadth are about 

 equal. The posterior angles of the cephalothorax are prolonged into 

 long slender* points, which are distant and divaricate. The caudal 

 setae were mutilated in the specimen examined, except the inner one 

 of the four apical, which was about as long as the stylets. 



The antennae have the basal joint slightly oblong, but shorter than 

 the following. At intervals (? on second, sixth, and eleventh joints) the 



