115 



a.-. The legs of the 2"'^ pair are conspicuously unequal in length. 



<^j Third abdominal tergum compressed and carinated in the middle, 



the carina ending abruptly, like a tooth, at the posterior fourth. 



Rostrum more than twice as long as the carapace, upper border 



with a solitary tooth a little behind the apex besides 6 or 



7 teeth at the base iinidens Bate 



Ik No carinate tooth on the middle of third abdominal tersjum. 

 c^ Ocellus distinct. Rostrum conspicuously longer than antennal scale, 

 rt'j Abdomen at the utmost three times as long as the carapace. 

 e^ Carpus of the legs of the 3"^ pair shorter than the propodus. 

 /j Dactylus of the three posterior legs very short, measuring 

 one-fifth of the propodi. A more or less long jjart of 

 the upper margin of the rostrum, beyond the tip of the 

 antennular peduncle, is smooth, unarmed. 

 g^ Stylocerite reaching to the distal extremity of antennular 



peduncle. Rostrum crescent-shaped. Ocellus circular . rostricresceniis Bate 

 (C. Spence B.\TE, Report Challenger Macrura, 1888, p. 653, Tl. CXIV, fig. i). 

 g^ Stylocerite reaching to the middle of the 2°'^ joint of anten- 

 nular peduncle. Rostrum at first very little depressed, 

 nearly horizontal, but from the 2"*^ joint of antennular 

 peduncle strongly curved upward. Ocellus elliptical . assimilis de Man 

 f„ Dactylus of the three posterior legs long, measuring one- 

 third of the propodi. Teeth of the upper margin of the 

 rostrum proper placed at subequal distances, leaving no 



long smooth interspace between them binoatlns (Bate) 



e„ Carpus of the legs of the 3'''^ pair much longer than the 



propodus ocellus (Bate) 



(C. Spence Bate, Report Challenger Macrura, 188S, p. 657, PI. CXIV, fig. 3J. 

 d„ Abdomen nearly four times as long as the carapace. 



Rostrum bent strongly downward in front of eyes, terminal 

 half ascending. Transverse diameter of eyes not exceeding 

 axial. A species of small size, length of carapace 4,3 mm. exigua (Rathb.) 

 (M. J. Rathbun, in: U.S. Fish Commission Bulletin for 1903, Wash. 1906, 

 Part III, p. 916, PI. XXI, fig. 2). 



c„ No ocellus. Rostrum either a litde shorter or but little longer 

 than the antennal scale, 

 rt', Of the 6 to 9 teeth of the upper border of the rostrum four, 



rarely three, stand on the carapace behind the orbital margin bifiirca Alcock & Anderson 

 d. Of the 1 3 teeth of the upper border of the rostrum .seven 



to nine stand on the carapace behind the orbital margin spinidorsalis (Rathb.) 

 [Vi. J. Rathbun, in: U.S. Fish Commission Bulletin for 1903, Wash. 1906, 

 Part III, p. 917, PI. XXI, fig. 5). 



