640 DAVID BRYCE ON FIVE NEW SPECIES OF 



the brain is a little way behind the dorsal antenna. When 

 feeding, this species usually conceals the whole foot below the 

 rump segments. The foot has, I think, three segments, the 

 second somewhat disk-like and carrying two widely separated 

 spurs, which in dorsal view seem to be short, stout cones, but 

 are really only moderately short and strongly decurved. The 

 interspace between them is strikingly convex, and about 12 \x 

 wide. Two strong and broadly truncate toes were seen re- 

 peatedly ; a third was possibly present, but not detected. On 

 the post-oral segment there is a small prominence on either 

 side of the short antenna. 



Length, 320 /*. Rami, 21 fx. Corona, 23 //. wide. 



In ground moss at Mundesley and roof moss at Paston, near 

 Mundesley ; also in ground moss collected by Mr. G. K. Dunstall, 

 in Surrey. 



Habrotrocha longula, sp. nov. 

 PI. 39, fig. 1. 



Specific Characters. Rather elongate and slender ; body 

 nearly cylindrical ; foot very short. Corona wider than collar ; 

 pedicels separated by narrow gap ; disks slightly canted to dorsal 

 side. Upper lip rising to moderately high, obtuse, median point. 

 Brain long, anterior close to antenna, posterior just overlapping 

 mastax. Gullet not looped. Rami somewhat triangular, longish, 

 each with five teeth. Spurs short, stout pointed cones, held 

 nearly parallel. 



In searching washings of moss or algae from stones in swiftly 

 running streams in hilly districts or near the shores of mountain 

 lakes, one frequently finds this species in numbers, and marching 

 about with much pertinacity, though not with much speed. It 

 attracts attention by its bright colour, the alimentary tract being 

 frequently of a vivid orange-red to pink-red tint, and the re- 

 mainder of the body of a much paler shade. If left undisturbed, 

 the various individuals take shelter after a time in convenient 

 ,l heaps " of particles, or of " floccose," and will presently com- 

 mence to feed and so settle down to satisfy their healthy appe- 

 tites. I have sometimes been able to see a rudimentary secre- 

 tion of a case, and have no doubt that a certain amount of 



