496 G. 0. SARS, [t. XIII 



The eye (see fig. 3) exhibits, as in the female of that species, only 2 

 small corneae, which are placed far apart, at the outer corners of the ocu- 

 lar lobe. 



The superior antennas (fig. 4) are rather elongated, and have both edges 

 of the peduncle supplied with bristles; the 2nd peduncular joint is much the 

 longest. 



The 1st pair of legs (fig. 5) are comparatively shorter than in P. bila- 

 mellata, otherwise of a very similar structure. 



The same also applies to the 2nd pair (fig. 6), which are particularly 

 short and stout. 



The 3 posterior pairs of legs (figs. 7, 8) are comparatively less strongly 

 built than in the 2 preceding species, but exhibit a very similar longitudinal 

 relation of their several joints. 



The uropoda (see fig. 9) are not very large, scarcely equalling in length 

 y 3 of the metasome. The scape is simple cylindric, and has inside but 4 small 

 setse. The rami are somewhat unequal, the inner one being considerably shorter 

 than the outer and, as usual, gradually tapering distally ; it has on the inner 

 edge only 5 small spinules and on the tip 2 unequal ones. The outer ramus 

 about equals in length the scape, and has, besides the 2 usual apical spines, 

 only a single small seta on the inner edge near the tip. 



The telson (ibid, and fig. 10) is nearly semicircular in form, and has the 

 edge slightly serrate, 2 of the serrations on each side of the tip being parti- 

 cularly strong and dentiform. 



Colour. — The specimens examined were uniformly whitish, without any 

 colouring marks. 



Occurrence. — Of this form 2 female specimens were collected by Mr. 

 Warpachowsky at Stat. 52, located off the northern point of the island of 

 Swjatoj. A few specimens of the same species were moreover contained in 

 a small collection of Caspian Crustacea sent to me from the Museum in 

 St. Petersburg for examination. According to the label, they were collected 

 by the late Academician Baer off the peninsula Mangyschlak. 



10. Pseudocuma scabriuscula, G. 0. Sars, n. sp. 



(PL XII, figs. 11—14). 



Specific Characteristics Ç. — Body very short and stout, with the anterior 

 division considerably tumefied, and sharply marked off from the posterior one. 

 Integuments everywhere scabrous with small projecting spikes. Carapace rather 

 large, having on each side in its anterior part a very conspicuous horizontal 

 crest continued to the tip of the pseudo-rostral projection; branchial regions 

 well defined; gastric area without any keels; pseudo-rostral projection, as in 



Bulletin N. S. IV (XXXYI) p. 332. 



