136 Annals of the South African 



female, it differs in the proportions of the mandibles and the 

 uropods. 



The pseudorostral lobes meet for a short distance in front of the 

 little triangular eyelobe ; seen from the side they project a little 

 upwards in an acute point, and laterally are truncate, meeting the 

 serrate lower margin without forming any produced tooth ; seen from 

 above they show a slightly serrate sinuous front. The carapace is 

 about one-fourth of the total length from pseudorostral point to end 

 of telsonic segment ; the medio-dorsal line is carinate, the first third 

 showing the alternating spinules in double line commencing on the 

 eyelobe and seemingly fading away into a single line obscurely con- 

 tinued to the hind margin. High magnification shows an extensive 

 distribution of minute denticles, each projected from one of the 

 irregular hexagonal cells of the surface, most of these cells having 

 an internal marking suggestive of their capacity to produce a 

 denticle. 



The first pedigerous segment appears to be firmly united to the 

 carapace. The four following segments are bordered below with 

 firm edges. The lower borders of the first five pleon segments are 

 flattened out. The produced part of the telsonic segment is almost 

 semicircular, with a little serration on each side of the middle of the 

 apical border. Norman assigns to B. brevirostris " telson very short, 

 semiovate, smooth." Bonnier figures the part in question as semi- 

 ovate, but rather long in relation to the antecedent part of the 

 segment. 



As in all species of the genus, the eye is wanting. The first 

 antennae have a geniculate first joint, the second shorter than the 

 third, the two-jointed flagellum shorter than the third joint of the 

 peduncle, its first joint being dilated near the base and fringed with 

 long filaments, the shorter second joint carrying the usual annulated 

 setae and others ; the minute two-jointed accessory is provided with 

 a close-set fascicle of very long setae. That this rather striking 

 apparatus is not mentioned in the other species is no doubt due 

 to the sex of the female specimens and probably to the immaturity 

 of the males. The second antennae have characters commonly found 

 in male Sympoda, unless the interlocking of the third and fourth 

 joints of the peduncle may prove to be exceptional (but Sars has 

 figured something similar in Bodotria and Leucon); the short penulti- 

 mate joint pushes up a small lobe between the two widely separated 

 lobes of the antepenultimate; the flagellum was not complete in any 

 specimen, but the proximal portion showed a very great number of 

 short joints furnished with setules. 



