304 C. 0. SARS, 



being almost as broad as it is long, and is setous on both edges. The last 

 2 joints ai'e comparatively short, and the dactylus is fully as long as the 

 propodal joint. 



The last pair of pereiopoda (fig. 7) exhibit the usual slender form, and 

 are about half as long as the body. 



The 2 anterior pairs of uropoda (see fig. 8) are rather short and stout, 

 especially the 2nd pair (fig. 9), and the rami have a smaller number of 

 spines than in the 2 preceding species. 



The last pair of uropoda (see fig. 8) are somewhat narrower than in 

 those si)Gcies; otherwise of a very similar appearance. This is also the case 

 with the telson. 



The pigment of the body is arranged in a manner similar to that found 

 in the 2 preceding species. 



Occurrence. — This species, as the preceding one, has been collected 

 by Mr. Warpachowsky at no less than 10 different Stations of the North 

 Caspian Sea. Of these Stations, 2 (St. 2 and 50) are located in the western 

 ])art of the basin, off the Tschistyi Bank, another (St. 21) at the point of 

 tlie peninsula Mangyschlak, 4 others (St. IG, 17, 27, 52) in the neigh- 

 l)Ourhood of the islands Kulaly and Morskoy, and the remaining 3 (St. 32, 

 55, 56) between these islands and the opposite western coast. At Station 

 32 and 55 the species occurred rather plentifully. 



The species is also represented in the collection of Dr. Grimm, having 

 been taken in the Bays of Baku and Schachowaja from the shoie to 5 fatlioms. 

 Moreover, numerous specimens of a Corophium, extracted fi'om the intestine 

 of an Accipenser stellatus and preserved in the same collection, have, on a 

 closer examination, turned out to belong exclusively to this species. 



26. Corophium robuslum'), G. 0. Sars, n. sp. 



(PI. XXIII, figs. 10—16). 



Specific Characters. — Body I'ather robust, with broad flattened back. 

 Frontal edge of cephalon very slightly augulated in the middle, lateral lobes 

 narrowly rounded. Coxal plates and urosome about as in the 2 preceding 

 species. Superior antennae in female comparatively short, not attaining Yj 

 of the length of the body, in male somewhat more elongated and having 

 the peduncle densely clothed with bristles, 1st joint of the peduncle in 

 female with 3 small spinules below, 2nd joint in both sexes shorter than 



1) In the plate tliis species is named C. bidcniatum; but as tliis name lias been previously 

 used by Dr. Marcusen for an apparently different species from tlie Black Sea, I have clianged 

 the name to robustum. 



'J'iio.-MiiT. crp. 212. JO 



