H24: CRUSTACEA. 



merit is large ; the two are nearly separate. The appendages to the 

 posterior part of thorax (fig. b) are as in the preceding species. 



Genus PONTELLA. 



Rostrum infra rigide et acute furcatum. Oculi infer lores et super lores, 

 pigmentis horum sive connatis sive disjunctis. Antenna antiea maris 

 dextra articulo genie tdans. Antennas posticce blramew, ramo minore 

 setis quinque apicalibus sospius confectum. Cephalothorax i-l-arti- 

 cuJatus. Maxillipedes crassi et recti, pedibus anticis majores, setis 

 longis spinulosis antice armati. Pes posticus maris dexter crassus, pre- 

 hensilis. Setw caudales medicares. 



Beak short and acutely furcate below. Eyes both inferior and supe- 

 rior, the pigments of the latter either connate or disjoined. Ante- 

 rior right antenna of male having a geniculating joint. Posterior 

 antennas two-branched, smaller branch ending, with rare exceptions, 

 in five setae. Cephalothorax four- to seven-jointed. Maxillipeds 

 stout and straight, larger than anterior feet, armed anteriorly with 

 long spinulous setae. Posterior right foot of male prehensile. Cau- 

 dal setae of moderate length. 



The Pontellae are remarkable for the geniculating joint of the right 

 antenna; the stout prehensile form of the right posterior foot; the 

 straight and stout maxillipeds, with long setae ; the inferior as well as 

 superior eyes, and the frequent disjunction and remoteness of the two 

 superior; the frequent obliquely forward projection of the anterior 

 antennae. 



Cephalothorax. — A cephalic segment — the part of the cephalothorax 

 pertaining to the eyes and two pairs of antennae — is usually separated 

 by a suture. Closely similar species, however, may differ in this par- 

 ticular; and it is even probable that the sexes may be in this respect 

 unlike. On this point, compare P. kebes with those related to it. 

 The subdivisions of the cephalothorax posterior to the cephalic seg- 

 ment are illustrated on page 1024. The posterior angles may be ob- 

 tuse or acute, and often the right point is longer than the other. 



The beak is strongly furcate. A suture may be observed at its 



