D. BRYCE ON FIVE NEW SPECIES OF BDELLOID ROTIFERA. 85 



of Stuttgart, who sent to me, as long ago as 1894, a sketch of the 

 animal together with some moss in which it occurred. I have 

 therefore given it the specific name Bilfingeri, in honour and in 

 grateful appreciation of a most courteous correspondent and of a 

 painstaking and careful observer of the Rotifera. The type form 

 of this species is marked by a series of lateral and dorsal knob- 

 like prominences on the posterior half of the trunk. As in most 

 other species with such knobs or with spines, the presence of these 

 ornaments is not constant, and occasional examples are found in 

 which some or even all the typical prominences are absent. 



Habrotrocha munda sp. no v. (PI. 8, fig. 1). 



Specific Characters. Corona moderately wide, exceeding collar ; 

 pedicels with dorsal inclination ; discs more strongly inclined in 

 same direction. Under lip relatively high, centrally prominent 

 and spoutlike, Dorsal antenna long. Rami with seven or 

 more fine teeth. First foot joint with dorsal prominence. Spurs 

 resembling caudal processes of Chaetonotus. 



In general build and in the somewhat " smothered " appearance 

 of the corona, due in this case to the shortness of the pedicels and 

 to the very oblique setting upon them of the trochal discs, this 

 species has a certain resemblance to Habrotrocha torquata, but 

 can usually be distinguished from it by the shape of the spurs, 

 which in typical specimens have a very characteristic moulding 

 and pose. In the normal or extended position, the body is spindle- 

 shaped, distinctly larger about or a little behind the centre, and 

 smaller at either extremity, and rarely exceeds 320 /x in length. 

 While the rostrum is shorter and thicker than usual, the head 

 and neck are only moderately stout, the trunk being distinctly 

 larger (sometimes almost swollen when well fed), the lumbar 

 segments short and tapering rapidly to a relatively small and 

 slender foot of (I think) three segments. When creeping, the 

 dorsal and lateral longitudinal skin-folds are usually well marked. 

 In adult examples the stomach wall is frequently of a vivid 

 reddish colour, and the lumen of the stomach is usually crammed 



