D. BRYCE ON A NEW CLASSIFICATION OF THE BDELLOID ROTIFERA. 79 



decurrent, so that in dorsal view they are partially visible to 

 right and left of the head. The brain is moderately remote 

 from the antenna, which in recent examples seems to be short, 

 but was perhaps not fully protruded, as early notes describe 

 it as long. It is, however, by no means infrequent among 

 Bdelloids to keep the antenna partially invaginated. In the 

 feeding position the lumbar segments show dorsally the two 

 prominent longitudinal skinfolds familiar in some other species 

 but not universal, and which I propose to distinguish as " the 

 lumbar plicae." The mastax is rather small ; the rami about 13 /x 

 long, each with six or seven very fine teeth. In most examples 

 the digestive fluid is distinctly tinted, usually reddish pink, 

 occasionally pale brown. In the act of creeping the foot is dis- 

 tinctly shown. It consists of three segments, and the spurs are 

 ^hort cones with an unusually blunt appearance in dorsal view. 



My largest examples measured about 220 fx when fully ex- 

 tended, about 170 fx when feeding. 



This interesting species has been known to me, albeit imper- 

 fectly, for many years past. I have notes of its occurrence in 

 sphagnum from Epping Forest, Sandown, I.W., Callander, Pit- 

 lochry, and Stuttgart. Some months ago 1 found several examples 

 in sphagnum kindly sent to me by Dr. V. A. Latham, of Chicago, 

 and these have enabled me to improve my acquaintance with its 

 peculiaiities. I have never found it in other mosses, and look 

 upon it as almost as distinctively a sphagnum form as is 

 Hahrotrocha roej)eri (Milne). 



Scepanotrocha corniculata sp. nov. (PI. 2, Fig. 2 ) 



Specific Characters : Membranous hood-like expansion, having 

 anterior median notch, two small lateral processes, and a straight 

 posterior margin. 



Frt)m ground-moss collected for me at Bournemouth early in 

 1909 I obtained a single specimen of this curious form, whose 

 striking divergence from the customary type I did not detect 

 until, some weeks after its isolation, I first saw it feeding. The 

 membranous expansion (seemingly of the upper lip) was per- 

 fectly transparent, and the position of the trochal discs upon 

 the ventral side could be defined, although I could not see 

 -whether they were quite prone or somewhat obliquely placed. 



