(RUST.UE.V CASPIA. 207 



(Hour. — III senile specimeiis received short time after they had been 

 ca])tiired, a few lijilit reddisli markings were observed on the sides of the 

 body, apparently l^eiug the remiiaut of a pigment ; but whetlier this may 

 have been something merely accideutal, I cannot assertain. In anotlier bottle 

 all the specimens exhibited along the edges of the dorsal projections a 

 border of a very dark hue, as indirnted in the figs. 1 and 2 on PI. V. 



Occurrence. — ■ Of this characteristic form numerous specimens were 

 collected by Mr. Warpachowsky in several localities of the North Caspian 

 Sea. It has been noted from no less than 16 ditferent Stations, distributed 

 partly along the western coast, from the Bai Agrachausky up to the mouth 

 of the Wolga, partly in the tract extending nortJi of the peninsula Mangy- 

 schlack,>and also in 2 Stations (31 and 32) lying about midways between 

 the latter peninsula and the opposite western coast. In some of the Stations 

 it would seem to have occurred in great profusion. 



Dr. Grimm collected this form in the Bai of Baku, and besides in 

 several Stations both of the southern and middle part of the Caspian Sea, 

 up to the peninisula Mangyschlak; the depth varying from 2 to 35 fathoms. 

 A small variety (perhaps a news species) was also collected by the same 

 naturalist at Baku in comparatively shallow water, among the grass. 



Out of the Caspian Sea this form has not yet been recorded. 



5. Amathillina affinis, G. 0. Sars, ii. sp. 



(PI. VI, figs. 9—19). 



Specific Characteristic. — Very like the preceding species, but of much 

 inferior size. Anterior part of mesosome not keeled dorsally; the last 2 seg- 

 ments of mesosome and those of luetasome each produced dorsally to a pro- 

 minent, acutely triangular projection, that of last segment nearly of same 

 form as the preceding ones. Cephalon and urosome almost as in A. cristata. 

 Anterior pairs of coxal plates somewhat smaller than in the said species; 

 otherwise of a similar shape. Eyes comparatively larger and distinctly reni- 

 form. Superior antenna} very slender and exceeding half the length of the 

 body, 1st joint of the peduncle but little longer than the 2nd, accessory 

 appendage shorter than the last peduncular joint, and only 3-articulate. 

 Gnathopoda in female very small and of a similar structure to that in A. 

 cristata. propodos of the posterior ones much narrower than that of the 

 anterior and having the palm nearly transverse; those in male largely deve- 

 loped, with the propodos in both i)airs oblong oval in form, scarcely widen- 

 ing, distally. Basal joint of penultimate pair of pereiopoda very different in 

 shape from that of the antepenultimate pair, being strongly expanded, with the 



■iHS.-MaT. CTp. 207. 29 



