CRUSTACEA CASPIA, 215 



Occurrence. — This form was collected latlier abundantly by Mr. War- 

 pachowsky in the North Caspian Sea, and has been noted from no less 

 than 16 differeutr Stations. Of these one (St. 2) is located oif the Tschistyi- 

 Bank, another (St. 12) in the inner part of the Bai Agrachansky, a third 

 (St. 31) about midway between the peninsula Mangyschlak and the opposite 

 western coast, the others in the tract north of the said peninsula, 2 of them 

 (St. 53 and 54) lying at some distance north of the islands Kulaly and 

 Morskay. In some of the Stations, especially in St. 52 (off the island Swjatoj), 

 it would seem to have occurred in great profusion. 



Dr. Grimm collected this species in the Bai of Baku, from a depth of 

 4 feet down to 6 fathoms, furthermore in the Bai Balchansky, 7 — 12 fms., 

 in the Bai Murrawjew, 10 — 20 fms., and on the west coast of Sara, among 

 Zostera. A single specimen in the collection was, according to the label, 

 taken by Kessler at Astrachan from Asiactis leptodactylus. The specimens 

 in the collection of Dr. Grimm are on the whole of much smaller size than 

 those collected by Mr. Warpachowsky in the North Caspian Sea. 



According to Eichwald, this form was collected by, Pallas in the 

 mouth of «Rhymnus» together with G. pulex (= G. hcemohaphes). 



Out of the Caspian Sea it has not yet been recorded. 



7. Gammarus haemobaphes, Eichwald. 



(PI. VIII). 



Gammarus hcemobaphes, Eichwald 1. c. p. 230, PL XXXVU, fig. 7. 



Syn.: Gammarus pulex, Pallas (not Fabr.). 



Specific Gharacteristic. — Body resembling in form that in the more 

 typical Gammari (e. g. G. locusta), being rather slender and compressed, 

 with the mesosome and metasome perfectly smooth throughout. The 2 ante- 

 rior segments of urosome each having a small, conical dorsal tubercle tipped 

 by 2 minute juxtaposed spines; 1st segment besides provided, on each side 

 of the dorsal face, with a single small spinule, and last segment with 2 such 

 spinules. Cephalon with the lateral lobes rather broad and somewhat ob- 

 liquely truncated at the tip, the inferior corner being more prominent than 

 thei superior. Coxal plates of moderate size, 4th pair rather broad in their 

 outer part, and angularly produced below the posterior emargination. Last 

 pair of epimeral plates of metasome but very little produced at the lateral 

 corners. Eyes well developed, reniform, pigment dark. Superior antenna) 

 rather slender and longer than the inferior, with the accessory appendage 

 rather fully developed, and composed of 7 — 9 articulations. Gnathopoda in 



$ii3.-5IaT. cTp. 215. 37 



