18 LÖNNBERG, THE BIOLOGY OF THE CASPIAN SE A. 



Paramysis baeri Czerniavski. 



(Stat. 9 and 13). 



Depth: 9 feet — 8 sashen as weil över a bottora consisting 

 mainly of Dreyssena shells as of shells and clay. 



Metamysis strauchi (Czern.). 



(Stat. 2, 3, 5, 7, 11, 12 and 13.) 



Depth: 9 feet to 8 sashen, the most common species in the 

 northern part of the Caspian Sea at the season and not confiued 

 to any special kind of bottom. It was interesting to find this 

 form at so many localities in the northern parts of the Caspian 

 Sea as it seems to have been collected only a few times before. i) 

 Its nearest ally M. grimmi G. O. Särs lives in the South 

 Caspian Sea in rather deep water. 



Pseudoeuma pectinata Sovinsky. 



(Stat. 3, 5, 7 and 13.) 



Depth: 9 feet — 17 feet; on mud and shells and mixed bottora 

 as well as araong algee. 



P. soAdnskyi G. O. Sars. 



(Stat. 2, 3, 5, 7, 12 and 13.) ' 



Depth: 9 feet — 8 sashen; the most common form of this 

 group in the region investigated at the time of my sojourn and 

 occurring as well on shells and mud as among algee. This proves 

 that its distribution extends över the greater part of the North 

 Caspian Sea. 



P. rostrata G. O. Sars. 



(Stat. 3 and at Baku.) 



Depth: 17 feet — 7 sashen; shells mixed with clayey mud. 

 It is chiefly known from the northern part of the Caspian Sea, 



') Conf. G. o. Sars: On some additional Crustacea from the Caspian Sea, l'An. 

 du Mus. Zool. de l'Acad. Iinp. des Scienc. St. Pétersbourg. 1897. p. 2 — 6. 



