CRUSTACEA CASPU. 209 



exceed iu leugtli the 2ud, and the 3rd joiut is considerahly l)otli shorter 

 and narrower tliau the hitter. Tlie flagelliim is about half again as long as 

 the peduncle, and' composed in the female of about 15 articulations, in the 

 male of nearabout the double number. The accessory appendage in both 

 sexes is much smaller than in A. cristafa, and is only composed of 3 arti- 

 culations. 



The inferior antennae are much shorter than the superior, especially in 

 the female, and of a similar structure as in J. cristata. 



The gnathopoda in the female (figs. 1 1 and 1 2) are rather small and 

 nearly of equal length, though the posterior ones appear somewhat feebler 

 in structure. The propodos in the latter (fig. 12) is much narrower than in 

 the anterior, and has the palm nearly transverse. In the male these limbs 

 (figs. 18 and 19) are very strongly developed and of a similar structure to 

 that iu the male of the preceding species, though differing iu the propodos 

 being more regularly oval iu form, that of the anterior pair (fig. 1) being 

 rather tumid in tlie middle. 



Of the pereiopoda, the last 2 pairs differ very markedly from those of 

 the preceding species in the shape of the basal joint. In the penultimate pair 

 (fig. 14) this joint is very unlike that of the antipenultimate pair (fig. 13), 

 forming a large and broad expansion posteriorly, whereby it acquires a 

 somewhat heart-shaped form, the posterior edge being boldly curved below 

 the middle. In the last pair (fig. 1 5) it expands obliquely to a greatly pro- 

 jecting lobe, obtusely truncated at the tip and extending almost to the 

 middle of the meral joint. In the male these joints are somewhat less ex- 

 panded than in the female, being however much broader than iu the male 

 of A. cristafa. 



The uropoda are nearly of same structure as iu that species, except that 

 the 2 anterior pairs are armed with a less number of spines, and that the 

 outer ramus of the last pair (fig. 16) is somewhat more elougated. 



The telsou (fig. 17) has the terminal lobes obtusely pointed and each 

 only tipped by 3 fine hairs, no spine being found neither on the tip nor on 

 the outer edge. 



Occurrence. — This species also has been collected by Mr. Warpa- 

 chowsky in several localities of the North Caspian Sea, it being noted 

 from no less than 1 1 different Stations, but in none of them it occurred in 

 any abundance. Of these Stations one (St. 2) is located off the Tschistyi- 

 Bank, another (St. 1 2) in the inuer part of the Bai Agrachansky, 4 other 

 (St. lG,17,28,29)iu the tract north of the peninsula Mangyschlak, an 8th 

 (St. 32) about midway between that peninsula and the opposite western 

 coast, another (St. 49) between the islands Morskay and Kulaly, and the 



*B3.-l!aT. CTp. 209. 31 14 



