246 



at either side of the anterior fifth and another still smaller one near the antero-lateral angle. 

 Pleuron of 4'"^ somite resembling that of 3"*. On the 5''' tergum the median crest is trifurcate 

 like in other species, median part broadly interrupted, the anterior part subacute in a lateral 

 view, the lateral branches longitudinally fluted. At each side of the anterior part of the crest 

 are situated two tubercles, of which the outer near the lateral crest is a little smaller than the 

 inner; a somewhat larger, third tubercle exists posteriorly just in front of the groove and 

 laterally. The pleuron is furnished above between the swelling and the longitudinal crest by 

 which it is separated from the tergum and which is notched quite anteriorly, with three tubercles 

 and it terminates below in two sharp teeth or spines, of which the posterior is a little larger 

 than the other. Median crest of G'*" somite prominent, more compressed laterally than the 

 preceding and distincdy indented at the anterior fourth ; this tergum is separated from the 

 pleuron by three subacute tubercles situated behind one another, a fourth though smaller tubercle 

 occurs between the posterior one of these three and the median crest. Instead of a swelling the 

 pleuron of the 6''' somite bears a curved row of three subacute tubercles, of which the two 

 anterior are placed near one another, the third more po.steriorly ; terminal spine comparatively 

 large, acuminate, directed backward. Telson a little longer than the uropods, deeply grooved, 

 the lateral edges smooth; the telson is not crested in the middle anteriorly, but bears at base 

 a small, median, acute tooth; proximal third of lower margins serrulate. 



All the crests and tubercles of carapace and abdomen are distinctly punctate. 



Eyes equal, of a drab colour; their major diameter measures about one-fifth the length 

 of the free portion of the rostrum and, as in other species, there is a small tubercle anteriorly 

 near the cornea. 



The antennular peduncle projects by the terminal joint beyond the tip of the antennal 

 scale; terminal joint half as long as 2'"', 2^'^ and 3'^'' together nearly two-thirds the length of 

 basal article. 



Antennal peduncle reaching to the far end of the 2°^^ joint of the peduncle of the inner 

 antennae; scaphocerite as long as the antennal peduncle, oval, tv/ice as long as broad, 

 with a small spine just in front of the middle of the outer margin. 



External maxillipeds as long as the antennular peduncle. 



Peraeopods of the 2"'^ pair reaching by the chela and one-third of the carpus 

 beyond the tip of the antennal scale, much longer than the three posterior peraeopods. 

 Those of the 3'"'^ pair extend to the tip of the antennal scale, those of the 4'** reach by one- 

 third the dactyli beyond it ; the 5"^ pair are hardly shorter than the scale. The dactyli of the 

 y^ and 5'^ pair are half as long as the propodi, those of the 4''', about one and a half as 

 long, are but little shorter than the penultimate joints; the propodi of the two last pairs end 

 in a brush of setae and the dactyli resemble those of Glyph. (Plastocrangon) caeca W.-Mas. 



Eggs not numerous, of a rusty colour, major diameter 2,3 mm. 



The female from Stat. 12 not fully agrees with that from Stat. 297. It is a little larger, 

 the abdomen being 33 mm. long; unfortunately the rostrum is mutilated, like also the right 

 half of the carapace. The differences from the type are the following. The orbital spine is not 

 contiguous to the eye, but a little remote from it. Instead of the blunt tubercle on the 



