45 



directed downward, die upper is half as long as the lower. At first sight Paulson's figure 6 

 of the rostrum, looked at from above, does not seem to agree with our specimen; but below 

 the base of the rostrum the semicircular prominence, from which in Paulson's figure the rostrum 

 proceeds forward, becomes also visible by means of the microscope in our specimens. I now 

 ■suppose that Paulson has erroneously drawn this prominence as the base of the rostrum and 

 that the true base of the latter was overlooked by him. Carapace of a stout shape, only 

 twice as long as high, rostrum included ; antennal spine well-developed and curved inward 

 when looked at from above, antero-lateral angfle rounded. 



Abdomen a little more than twice as long as the carapace. Fifth somite with n o tooth 

 at the obtuse posterior angle of the pleura. Telson (Fig. 19c) 2 mm. long, one-fourth the rest of 

 the abdomen, tapering much backward, the width of the posterior margin, 0,24 mm., being 

 hardly half the width (0,55 mm.) anteriorly. Anterior pair of dorso-lateral spinules 0,22 mm. 

 long, 0,36 mm. distant from the posterior margin of the 6"> somite, this distance one-fifth 

 (in the figured telson of the female one-si.\th) the length of the telson; posterior pair 0,1 8 mm. 

 long, situated about midway between the anterior pair and the tip. Of the two terminal spinules 

 at either side of the tip the longer one is 0,4 mm., the other 0,13 mm. long. Outer uropod 

 slightly longer than inner, both surpassing a little the telson. 



The antennular peduncle difters from that of the adult female from Stat. 193 (1. c. fig. 52) 

 by its less slender form: the 2°<i joint, indeed, is only three times as long as wide, 

 viewed from above, and only one and a half as long as the 3''^. The antennular peduncle 

 is as long as the antennal scale, which much resembles that of the female from Stat. 193 

 (I.e. fig. 52), but the distal border runs almost transversely and is distinctly surpassed by the 

 terminal spine. The antennal peduncle hardly e.\tends beyond the strongly excavated basal joint 

 of the peduncle of the upper antennae, spine at the outer angle of 2"'^ joint well-developed. 



The antepenultimate joint of the outer maxillipeds reaches as far as the antennal peduncle. 



Merus of left simple leg (Fig. igc) of P' pair slender, 1,7 mm. long, 6-times as long as 

 •wide in the middle; carpus 0,65 mm. long, 3-times as long as wide distally; propodus 0,84mm. 

 long, one-fourth longer than the carpus, nearly 4-times as long as wide proximally and distinctly 

 tapering; dactylus 0,3 mm. long, half as long as the carpus. 



Merus of the right chelate leg (Fig. igd) 1,6 mm. long, sYj-times as long as wide in the 

 middle; carpus 0,58 mm. long, half as wide distally as long; chela 0,92 mm. long, about 

 one and a half as long as the carpus, 3-times as long (in a lateral view) as wide proximallv, 

 fingers nearly half as long as the palm. In the female the fingers are somewhat longer. 



The right peraeopod of the 2°^ pair (Fig. 19/) is 5,6 mm. long (merus 1,4 mm., carpus 

 2,24 mm., chela 0,48 mm.), the left 5 mm. long (merus 1,28 mm., carpus 2,06 mm., chela 0,46 mm.l; 

 in both legs the carpus is divided into 13 segments, while in Paulson's specimen, a female, 

 it was divided into i i ; of the carpus of the right leg the i^' or proximal segment is 0,4 mm. 

 long, the 2"'^ 0,15 mm., the last joint 0,24 mm. long and 0,145 mm. broad in the middle, 

 fingers as long as the palm, chela 0,155 r"'"- broad, 3-times as long as broad; of the carpus 

 of the left leg the 1^' segment is 0,37 mm. long, the 2"'^ 0,15 mm., the last 0,22 mm. long 

 and 0,14 mm. broad in the middle, chela 0,46 mm. long and 0,15 mm. broad, also 3-times 



