1136 



CRUSTACEA. 



cate, nearly straight, a few longish setae at intervals, the apical 

 more than twice as long as the last joint, the subapical shorter. 

 Posterior antennae with the branches very unequal; the setae of 

 these and the following organs nearly as long as the body, ele- 

 gantly plumiform. Caudal stylets sparingly oblong; setae a little 

 longer than the abdomen, spreading. 



Plate 79, fig. 10 a, animal, enlarged ; b, maxillipeds ; c, one of the 

 natatories ; d, fifth pair. 



Collected, October 20 and 23, 1838, in the Atlantic, latitude 5°-7° 

 north, longitude 21°-22° west. 



Length, one-twelfth of an inch. Colour, yellowish, with grayish or 

 brownish yellow along the centre. The species is remarkable for its 

 thick short form and the long plumes of the posterior antennae and 

 following organs. The length of the cephalothorax is about twice the 

 width. Beak below long and straight. Second joint of abdomen 

 longest; the whole abdomen not more than one-third the cephalo- 

 thorax. Caudal stylets very little longer than the last abdominal 

 segment; a plumose seta on the second joint of the anterior antennae, 

 which is longer than the joint; and another still longer on the fourth 

 joint ; another seta of nearly the same length from near the middle of 

 the antenna; the anterior apical setae a little shorter. Abdomen 

 three-jointed. 



PONTELLINA TURGIDA. 



Frons rotund atus. Cephalothorax crassus, obesus, 5-Q-articulatus, capite 

 discretus, posticd obtusus. Oculi superiores ap>proximati. Antenna 

 antico3 corporis longitudine, ferme 2l-articidato3, 60°-90° divaricatce 

 et prope medium obsolete reflexw; sells brevibus, penultimd posticd Ion- 

 giore quam apicales aut ceteras subapicales. Antenna antica maris 

 dextra 10-12-articulata, articulo submediano lath subovato et apice 

 acutOj articulis tribus sequentibus valde elongatis, ultimo triplice. 

 Antennas posticm ramis valde in&qui, setis longis. Abdomen 4—5- 

 articulatum. Styli caudales oblong i ; setis mediocribus. 



Front rounded. Cephalothorax short and stout, obtuse behind, five- 



