792 ON THE XON-MARINE FAUiVA OF SPIXSBEBGEN. [JuQS 15, 



ACABINA. 



A few very much damaged specimens of Oribatidfe were found 

 and submitted to Mr. A. D. Michael, who very kindly examined 

 them. He says that although, owing to the imperfect preservation, 

 he cannot be absolutely certain about the species, he feels pretty 

 sure that they belong to Scutovertex bilineatus and Kothrus in- 

 venustiis. If these determinations are correct, both of these forms 

 are new to the kuowu fauna of Spitsbergen. 



Entomostraca. 



Two species of Copepoda were found, representing the two 

 families Harpacticidse and Cyclopidae. Of the former, unluckily, 

 only a single damaged specimen was seen. It wns very minute, 

 measuring in its shrunken state J|j", and was probably a male, but 

 this could not be definitely determined as the first pair of antennae 

 had been torn off. Although apparently a new species, a proper 

 account of it cannot be given, owing to the imperfect condition of 

 the specimen. 



The other Copepods belonged to the genus Cj/clops. Four in- 

 dividuals in all wei'e observed, from as many different collections, 

 three by myself and one by Mr. Bryce. Of the former, two were 

 adult males of Cyclops hUttosus, Rehberg (as defined by Schmeil, 

 " Deutschlands freilebende Siisswasser Cojiepoden," Theil i. 1892), 

 and the other a young individual with 10-joiuted antennce, and 

 without much doubt also a male of the same species. The most 

 peculiar feature in connection with the two adult specimens was, 

 that although undoubtedly C. hisetosits, both of them exhibited 

 malformations. Thus in one example both of the fifth pair of feet 

 were abnormal, and also differed considerably from one another. 

 In the other specimen the feet of the fifth pair were quite normal, 

 but the two largest tail set:e were unusually thickened near the 

 base, and at a point on the protopodites of the fourth pair of 

 feet, where there should be one thick spine, there were two on the 

 right foot and none on the left. It may be useful to note that 

 0. bisetosus is usually found in this country in little temporary pools 

 with a thick growth of amphibious grasses and other vegetation, 

 but I have also found it occasionally by washing damp mosses. 



Insecta. 



The only adult Insects found were Collembola or Spring-tails. 

 Numerous specimens of a perfectly white species were present in 

 some of the collections, and also a few examples of a black species, 

 but they have not yet been determined. lu addition to these, two 

 or three Dipterous larvae were obtained. 



EXPLANATION OF PLATE XLV. (p. 791). 



Fig. I. Ecliiniscus spitsbergensis, n. sp. Dorsal view of an empty skin. X300. 

 Fig. 2. „ „ Ventral view of posterior body-segment, 



showing fourth pair of feet. X 600. 

 Fig. 3. „ „ One of the two median claws, showing 



small accessorj- hook, x 800. 



