1897.] NON-MAKINE TATTNA OF SPITSBERGEN. 789 



from the other collection, however, was colourless and appeared 

 Like fig. 26, on plate 37, of Leidy's ' Ehizopods of N. America.' 



Teinema enchelys, Ehrbg. 



About as common as Euglypha ciliata and found in the same 

 number of collections, namely eleven. The specimens exhibited 

 a very considerable amount of variation. In a few collections a 

 form was seen which was larger than any of the ordinary specimens, 

 being j^", and characterized by the great development of the shell 

 around the oral aperture. Leidy gives figures of forms probably 

 identical with this (I. c. plate 39. figs. 41, 61, & 63 inferior views, 

 and fig. 54 lateral view). It is probably also the same as Arcella 

 dispha'va, Ehrbg. 



AcTiiiropHiiTS SOL, Ehrbg. 



Specimens of this well-known Heliozoan occurred sparingly in 

 three of the collections. 



ACANTHOCTSTIS Sp. 



This was a very small species, y^Vo "■> ^^''th numerous delicate 

 simple spines and a few long pseudopods. It was very similar to 

 the drawing of an unnamed species given by Leidy (i- c.. plate 43. 

 f. 10), but was destitute of the envelope of granular protoplasm 

 shown in that figure. According to the key given by F. Schaudiun 

 (Heliozoa in 'Das Tierreich,' Berlin 1896), it conies nearest to 

 A. spinifera, Greeff. This form was represented in three collections 

 by a few specimens. 



CiATHEiiLiisrA ELEGANS, Cienk. 



Only a single detached capsule of this beautiful species was 

 found. It was of a deep yellow colour, ^-^" in diameter, not quite 

 spherical and with slightly irregular openings. It contained two 

 encysted individuals. 



Gromia sp. 



A specimen of a species of Gromia was seen by Mr. Bryce whilst 

 searching for Eotifers, but no further specimens could be obtained, 

 and the species remains uncertain. 



In addition to the foregoing, a minute testaceous Rhizopod was 

 seen in two or three of the collections which mav possibly have 

 been CTilamydoplirys stercorea, Cienk. In outline, size (7-g-g-"), and 

 absence of evident shell-structure it was about the same as the 

 species named, but no pseudopods were seen, and it is therefore 

 impossible to be sure even of the group to which it belonged. 



Inttjsoria. 



A fair number of Infusorians were noticed, but tlie group was 

 not specially studied and no detailed account of it can be given. 

 It may be noted, however, that the commonest form was either 

 identical with or very similar to Uroleptus piscis, Miill, Ehrenberg, 



