226 Zoological Society. 



water lake of Loak in the Crimea, is about 5 lines in length and of a 

 brown colour. The inferior antennae of the male are much more 

 slender than in tbe preceding species. The basal joint has no tooth 

 and the terminal joint is cylindrical and pointed. The superior an- 

 tennae, according to Fischer, have the first joint very short and of an 

 obconical form, and the two cephalic segments are considerably elon- 

 gated. The abdomen is slender, shorter than the body, and is termi- 

 nated by a simple bilobed process not furnished with setae. The feet 

 are rather long, and the terminal joint is armed with long filaments. 

 In the month of July these animals abound in great numbers ; 

 they fill the lake and give the water a brick-red colour. 



3. Artemia Guildingii, Thompson. Species hcec, reperta in 

 India Occident ali, delineata est a Domino Thompson in ' Zoo- 

 logical Researches,' sed non descripta, necnon satis accurate 

 delineata est. 



Artemis Guildingi, Thompson, Zool. Research. Fasc. v. t. 1. f. 11. 



Hab. In insula " St. Vincent's," in India Occidentali ; Rev. L. 

 Guilding. 



This species is figured by Mr. Thompson, but not sufficiently de- 

 scribed to enable me to give a good diagnosis of it. It was found at 

 St. Vincent's in the West Indies by the Rev. Lansdowne Guilding, 

 by whom its natural history was intended to have been more fully 

 detailed. The body seems to be thick and the abdomen shorter than 

 the body and stout. The caudal segment does not appear to be 

 lobed nor setigerous. The cephalic segment is conical in shape, and 

 the superior antennae, according to Mr. Thompson's figure, consist 

 each of four joints. The ovarian sac consists, according to the same 

 authority, of two articulations. 



4. Artemia arietina, Fischer. Antennis inferioribus maris 

 validis, articulo secundo latissimo, basali unidentato ; antennis 

 superioribus apice furcatis, setigeris ; segmento caudali bilo- 

 bato, lobis setigeris. 



Long. 4-6 lin, 



Artemia arietina, Fischer, Middendorff s Sibirische Reise, h. 156. 

 t. 7. f. 31-35 (1851). 



Hab. In vicinitate urbis Odessae ; Middendorff. 



This species, which was found by Middendorff in the neighbour- 

 hood of the town of Odessa, is about from 4 to 6 lines in length. It 

 approaches very near to the Artemia salina. The inferior antennae 

 in the male have the second joint very broad and flat and sharp- 

 pointed. The superior antennae are forked at the extremity, the 

 forks unequal] each having two terminal setae. The eye is very large 

 and the caudal segment is bilobed, each lobe terminating in three 

 pretty long setae. 



5. Artemia Koppeniana, Fischer. Antennis duabus ut in prce- 

 cedente ; segmento caudali non lobato nee setigero. 



Long. 2^-3 lin. 



Artemia Koppeniana, Fischer, Middendorff' s Sibirische Reise, ii. 

 157. t. 7. f. 36-37 (1851). 



Hab. In Russia Australi ; Koppen. 



