THE GENUS HABROTROCHA. 637 



Habrotrocha sylvestris, sp. nov. 

 PI. 39 fig. 2. 



Specific Characters. Head and neck slender, elongate ; trunk 

 much stouter. Corona narrow, disks scarcely separated, much 

 canted to dorsal side ; pedicels adnate, obliquely truncate, 

 hidden in dorsal view by upper lip, which rises in bold curve 

 nearly to edge of disks, and is centrally obtusely angled and 

 moderately deep. Gullet long, looped. Brain close to antenna. 

 Mastax set far back when feeding. Rami with two and three 

 teeth respectively. Foot short, usually hidden. Spurs short, 

 acute, conical, slender, divergent. Oesophagus with constant (?) 

 undulating movement. 



I have seen only some five or six examples of this species, 

 which seems to be closely related to H. angusticollis. It differs 

 very markedly in the form of the under lip, which is not pro- 

 duced into a spout-like front, but simply rounded like the edge 

 of a cup. When feeding, a few annular wrinkles are visible on 

 the ventral and lateral surfaces of the head about the level of 

 the retracted rostrum, and to right and left of the antenna are 

 two minute decumbent processes. The animal crawls in a rather 

 leisurely fashion. On one occasion I saw a rough tube, partly 

 secreted, partly of entangled particles, and I have seen eggs 

 measuring about 70 /x x 40 ft, of normal outline, smooth and 

 hyaline. 



I have no record of the length when extended, but estimate it 

 about 220 //. When feeding , the individual figured measured 

 about 190 fx. 



Several examples were found in ground moss collected by 

 Mr. A. W. Sheppard in St. Leonard's Forest, Horsham, in 1909. 

 Another was detected in moss sent me by Mdle. Montet, of 

 Vevey, Switzerland, and one other in moss from the Black Forest, 

 Baden, which the late Mr. John Stevens, of Exeter, had received 

 and kindly shared with me. 



Habrotrocha pavida, sp. nov. 



PL 38, fig. 2. 



Specific Characters. Body gradually increasing to greatest 

 width near rump, thence rapidly diminishing ; foot small, of 



