86 



PROCEEDINGS OF THE NATIONAL MV8EVM. vol. xxxvi. 



SYNALPHEUS PARANEPTUNUS, new species. 



The tridentate region joins impercejitibly the rest of the frontal 

 margin; the rostrum is 1.5 times longer than the lateral teeth, and 

 of the same width; these teeth are sharp-pointed at the extremity, 

 while the end of the rostrum is rounded. 



The articles of the antennule are as 2, 1.3, 1. The stylocerite 

 equals the basal article. The superior angle of the basicerite is a 

 right angle, and well marked; the lateral spine reaches the middle 

 of the median antennular article. 



In the females the scaphocerite is almost wholly destitute of a 

 scale. In the males it possesses one, which is alwa3^s very narrow and 

 in length varies between the extremity of the basal article and the 



FlO. 52. SYNALPHEUS PARANEPTUNUS. fl, FRONTAL AND ANTBNNAL KKGION OF TYPE MALE ; 



a', FRONT AND BASE OF ANTENN^TE OF ANOTHER MALE WITH ANTENNAL SCALE MORE RE- 

 DUCED ; a", FRONT AND BASE OF ANTENN.E OF FEMALE WITH ANTBNNAL SCALE ABSENT ; 

 K, LARGE chela; K", MEROPODITE AND CARPUS OF LARGE CHELIPED ; fc', SMALL CHELIPED 

 OF FIRST PAIR j k'", FINGER OF SAME ; I, FOOT OF SECOND FAIR ; 111, FOOT OF THIRD PAIR ; 

 m', DACTYL OF THIRD PAIR ; t, TELSON ; tl, UROPOD, MALE AND FEMALE. 



distal third of the median antennular article. The lateral spine is 

 considerably wider than that of the basicerite and as long as the 

 antennule. 



The carpocerite surpasses the antennular peduncle by the length 

 of the basal article, and is G times as long as wide. 



The proportions of the large chela are: Fingers 1; total length 3; 

 height 1. The anterior margin of the palm bears a strong tubercle 

 terminating in a small conical point directed downward. 



The meropodite is strongly convex on its superior margin, 

 especially near its extremity, where it forms a slight triangular 

 prominence. 



J 



