I I 



a 3 The legs of the 2 nd pair are conspicuously unequal in Iength. 



1> X Third abdominal tergum compressed and carinated in the middl< . 



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 unidens Bate 



b t No carinate tooth on the middle of third abdominal tergum. 

 c\ Ocellus distinct. Rostrum conspicuously longer than antennal scale. 

 d x Abdomen at the utmost three times as long as the carapace. 

 e l Carpus of the legs of the 3 ld pair shorter than the propodus. 

 ƒ, Dactylus of the three posterior legs very short, measuring 

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

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

 antennular peduncle, is smooth, unarmed. 

 g x Stylocerite reaching to the distal extremity of antennular 



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

 (C. SrENCE Bate, Report Challenger Macrura, 1888, p. 653, PI. CXIV, fig. 1). 

 g 3 Stylocerite reaching to the middle of the 2 nd joint of anten- 

 nular peduncle. Rostrum at first very little depressed, 

 nearly horizontal, but from the 2 nd 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 lünociilus (Bate) 



e 2 Carpus of the legs of the 3 rd pair much longer than the 



propodus ocellus (Bate) 



(C. SrENCE Bate, Report Challenger Macrura, 1888, p. 657, PI. CXIV, fig. 3). 

 d s 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, Iength 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). 



l\ No ocellus. Rostrum either a little shorter or but little longer 



than the antennal scale. 



rf x Of the 6 to 9 teeth of the upper border of the rostrum four, 



rarely three, stand on the carapace behind the orbital margin bifurca 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 spiiiidorsalis (Rathb.) 



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

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



