80 D. BRYCE ON A NEW CLASSIFICATION OF THE BDELLOID ROTIFEBA. 



In dorsal view the cilia of the discs Avere partially visible beyon(J 

 the frontal margin, and appeared as though flanked by longer 

 bristle-like setae (?), whose nature I was unable to determine,, 

 although 1 supposed them to be possibly homologous with the- 

 trochal setae-pencils possessed by many Philodinidae. 



This original example had some difliculty in extending and' 

 using its foot, which I never saw protruded or affixed. Thus- 

 when extended the animal was never still, either sprawling- 

 about as it tried to creep, or when the corona was displayed 

 being driven slowly along by the ventrally placed cilia. I 

 failed therefore to ascertain the number of teeth, but thought 

 that each ramus had three or four. When the corona waS' 

 withdrawn, and with it the distinctive " hood," the rotifer did 

 not present any obvious peculiarity save that the head seemed 

 somewhat long and the rostral lamellae rather large and pro- 

 minent. The anterior margin of the "hood" had a central! 

 angular depression, from which it curved outwards to right 

 and left till it arrived at the lateral processes, which were 

 somewhat pointed and ventrally deflexed. Their tips were- 

 about 35 fji apart. Behind them the ' hood " seemed to be 

 abruptly truncate, the hinder edge forming a straight line, 

 behind which could be seen the reverted rostrum. 



A second example was hatched from an egg produced by 

 the original individual. In the young specimen, which did not 

 long survive, the points of the " hood " had a rather backward 

 direction. The foot was normally protruded and occasionally 

 affixed, but usually the young rotifer swam slowly along like 

 its parent. The foot seemed to have three segments : the first 

 rather long and dorsally swollen ; the second small, with short, 

 cone-like spurs, about 6 /x long, and without interspace ; the 

 post-oral segment was laterally thickened, and carried a rather 

 short antenna. The stomach contained distinct food-pellets. 



The length of the adult example was estimated as about 205 ^, 



Description of Plate 2. 



Fig. 1. Scepmiotrocha rubra sp, nov., dorsal view. 

 2. corniculata sp. nov., dorsal view. 



b. Corona from ventral side. c. Foot. 

 d. Dorsal antenna. 



