56 



contiguous to the i st tooth is the 2 nd that is slighriy largjer, the 3 rd tooth, finally, which is very 

 small and the smallest of all, is placed midway between the 2 nd and the apex. 



The black ocellus is united at the inner side with the cornea, about as in Acanth. 

 angusta (C. Spence Bate, 1. c. PI. CXXIV, fig. 6a) and there is a low rounded ocular papilla 

 on the inner side of the stalk close to the cornea. 



Telson almost as long as the outer uropods, with 5 movable minute spinules at either 

 side along the posterior half. 



The rostrum of the two males from Stat. 178 that are 120 to 125 mm. long, reaches 

 as far forward as the antennal scales and resembles that of the described specimen, but the 

 distal half ascends less strongly, so that the apex is situated in a line with the highest parts 

 of the carapace. In one male of the 6 teeth on the upper border the 3 rd is situated above the 

 orbital margin, the three first teeth are equal and the following gradually increase in length ; 

 the i st tooth of the lower margin is situated immediately behind the middle, just in front of 

 the anterior tooth of the upper border, the 2 nd is contiguous to it, while the apex of the 3 rd 

 tooth is 2Yo-times as far distant from the exlremity of the rostrum as from the apex of the 2 nd 

 tooth. In the other male the two first teeth are the shortest of the six, the 3" 1 is placed above 

 the orbital margin, while the 5 lh is the longest of all; of the 3 teeth of the lower margin the first 

 two are contiguous, situated immediately in front of the 6 th tooth of the upper border, the 2 nd is 

 larger than the i 5t , the very small third tooth, finally, is placed more forward than in the other 

 male, though still a little farther distant from the extremity of the rostrum than from the 2 nd tooth. 



Telson, inclusive of the spines at the tip, as long as the outer uropod, 4 minute spinules 

 at either side along the two posterior fifths. 



In the two young specimens from Stat. 173 the rostrum extends considerably beyond 

 the antennal scales and fully agrees with figure 7 on Plate CXXVI of the Report on the 

 Challenger Macrura. In the larger one, in which the rostrum is 22,5 mm. long, the carapace 

 23,5 mm. and the abdomen 65 mm., so that this specimen measures 111 mm., the rostrum 

 appears almost just as long as the carapace and is armed above with 6, below with 3 teeth ; 

 the 3 vd tooth of the upper border is placed over the orbital margin, the two following gradually 

 increase in length, so that the 5 th just reaches beyond the distal end of the i st antennular article, 

 the 6 th tooth, finally, stands more forward, nearly opposite to the middle of the antennal scale; 

 the i st tooth of the lower border, placed a little farther distant from the apex of the rostrum 

 than from the orbital margin, stands immediately behind the 6 th tooth of the upper border and 

 the somewhat larger 2 nd tooth is contiguous to it and placed immediately before the 6 th tooth, 

 the much smaller 3 rd tooth, finally, as small as the 6 th of the upper, stands about midway 

 between the 2 nd tooth and the apex of the rostrum. The other specimen is 89 mm. long, the 

 rostrum 18,75 mm., the carapace 18,25 mm - an d the abdomen 52 mm.; the rostrum, slightly 

 longer than the carapace, is f-dentate; the 5 proximal teeth gradually increase in length, the 3" 1 

 stands above the orbital margin, while the 5" 1 just projects beyond the distal end of i st antennular 

 article; the teeth of the lower margin are situated on the middle third part and become slightly 

 smaller from the i st to the 3" 1 , while the apex of the 3 vd tooth is once and a half as far 

 distant from that of the 2 nd as the 2 n<1 from the i st . 



