1132 CRUSTACEA. 



(one-fourth at least) than the others (in most, if not all cases), which 

 is not true of the preceding subgenus Pontellina.* 



I. Subgenus CALANOPIA. 

 Calanopia elliptica. 



Feminae : — Fi'ons rotundatus. CephalotJiorax crassus, i-articulatus, 

 capite inermis, angulis posticis acutis, remotis. Oculi superiors 

 remotiusculi, inferiores mimiti. Antennae anticce duplo curvatm, 

 corpore breviores, apicibus fronte valde posterioribus, setis brevibus, 

 subapicalibus perbrevibus, apicalibus vix articuli longitudine. Styli 

 caudales oblongi, sells valde incequis. 



Female: — Front rounded. Cephalothorax stout, four-jointed, angles 

 behind acute and distant. Superior eyes small, a little separate; 

 inferior minute. Anterior antennas strongly doubly curved, 

 shorter than the body, slender, tips much behind line of beak ; setae 

 short, subapical very short, the apical scarcely as long as the last 

 joint. Caudal stylets oblong, setae unequal, somewhat spreading. 



Plate 79, fig. 6 a, animal, enlarged ; b, extremity of antenna. 



Collected in the Straits of Banca, east of Sumatra, on the 2d of 

 March, 1842. 



Length, one-sixteenth of an inch. Colour, yellowish umber, with 

 red each side of the alimentary canal. 



The antennae are quite Calanoid in position, and the cephalothorax 

 has also but four segments. The eyes are however separate, and the 

 inferior eyes were distinct, appearing in an upper view just behind 

 the superior. Of the caudal setae, the second is considerably the 

 longest, and curves a little outward. The anterior antennae have at 

 tip an anterior setae very nearly as long as the last joint, a posterior 

 a little shorter, and one or two outer, which are quite short and 

 uncinate. The apical joint of the antennae is about as long as the 

 penult. Abdomen two-jointed, segments oblong. 



* The new species beyond are briefly described in the Proceedings of the Amer. Acad. 

 Sci., ii. 26. 



