182 DIJ. G. S. BEADY ON NEW OR 



tlif slicll smooth, friugcd with rather long hairs on the anterior margin b(4ow the beak, 

 slightly pubescent on the ventral aspect, the posterior extremity with a thick fringe of 

 long hairs which ends abruptly both above and below. Colour yellowish-wliite. 

 Length G mm. Sensory appendage of the antennule (fig. 24) large and vei v densely 

 setiferous ; joints of tlie svvimming-brauch of the antenna (tig. 25) spined on tlie outer 

 margin — each spine as long as the following joint — and on the inner margin bearing 

 fascicles of short hairs ; secondary branch (fig. 26) having a long, flexuous claw which 

 for the greater part of its length is more or less distinctly cross-furrowed and has a 

 single stout seta near the base; basal joint bearing a few marginal hairs ; second joint 

 elongated, with sinuous margins and a brush of short setse near the distal end (fig. 26) ; 

 pectinated process of the mandibular foot rather feebly developed (fig. 27) and having 

 seven or eight curved apical teeth ; penultimate joint of the limb very densely setose ; 

 postabdominal laminae of the usual type, each with 5 or 6 strongly pectinated ungues 

 (fig. 29) ; spines of the larger ungues arranged in sequences, one large and one small 

 alternately (fig. 30). 



Female. Shell seen from the side broadly ovate, greatest height situated behind 

 the middle and equal to nearly three-fourths of the length, the left valve over- 

 lapping the right posteriorly (fig. 22) ; anterior extremity narrowly rounded, beak and 

 antennal notch well developed, posterior extremity distinctly angulated in the middle ; 

 dorsal and ventral margins very boldly arched, dorsal highest behind the middle, 

 ventral quite evenly arcuate : seen from above (fig. 23) the outline is subovate, widest 

 in the middle, about twice as long as broad ; anterior extremity produced and sub- 

 truncate, posterior wider, rounded, the left valve produced much beyond the right ; 

 lateral margins arcuate, rather deeply sinuated behind the anterior extremity ; surface 

 of the shell smooth, with a few short hairs below the antennal notch. Length 

 5'2 mm. The " masticating " process of the mandibular foot (fig. 2S) is more largely 

 developed and more strongly serrated than in the male ; the claws of the postabdominal 

 laminae are regularly spined (fig. 31), and the terminal joints of the mandibular foot are 

 destitute of the setose covering which is found in the male. 



Hah. Sourabaya (Java), several specimens, 6 ? ; Chiribon (Java), 4-|- fathoms, one 

 specimen, 6 ; Madeira, one specimen, d . 



The fact of male and female specimens being found together in the same gathering 

 leads to the supposition that both belong to the same species, though the remarkable 

 differences in the shape of the shell may be thought to throw some doubt on that view 

 of the matter. Pending further observation the two forms may be considered identical. 

 The antennal setae of this species are often much encumbered, or even glued together 

 by crystalline calcareous concretions similar to those which I have already described 

 and figured as occurring in Philomedes sculpta ^. 



' " On new or inaperfectlj--known Ostracoda," torn. cit. p. 435. 



