120 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
5. P. ACUMINATUS, n. 8p een figs. 87, 88.) 
Female, length 35", breadth 555 . 
External Characters.—Body white, tapering at both extremities, he at posterior, 
which is narrow and acuminated. Head rounded, unarmed.  Integumental striz trans. 
verse, 70300 apart. 
Pharyngeal cavity narrow, elongated, ii long. Esophagus about 4th of total 
length. Intestinal ne vay indistinct, from their containing very few light-coloured 
fat-particles. Anus 545” from posterior extremity. Vulva in middle of body. Erere- 
tory duct opening opposite the middle portion of œsophagus. Lateral vessels com. 
mencing in the usual way, at yoyo from anterior extremity. . 
Male, not seen. 
Hab. In moss. 
6. P. PARVUS, n. sp. (Plate X. figs. 89, 90.) 
Female, length 245”, breadth 1455". 
External Characters —Body white, tapering anteriorly and posteriorly, especially in 
the latter direction. Head rounded, unarmed. Striæ transverse, 35600 apart. 
Pharyngeal cavity 4453" long. (Esophagus about ith of total length. Intestinal 
cells very indistinct. Anus 545” from posterior extremity. Vulva at middle of body. 
Exeretory duct opening opposite middle of cesophagus. Lateral vessels commencing at 
integumental circles yopo from anterior extremity. 
Male, not seen. 
Hab. With P. velox, from moss covering stone lying in a freshwater stream, Fal- 
mouth. 
7. P. TRITICI, n.sp. (Plate X. figs. 91, 92.) 
Female, length 45", breadth 41;". 
External Characters.—Body white, tapering slightly anteriorly, but more posteriorly. 
Head rounded, unarmed. Transverse stri: readily seen, 15155 apart. 
Pharyngeal cavity 555 long. (Esophagus only sth of total length. Intestinal cells 
containing few light-coloured fat-partieles. Anus 315 m pe extremity. Pula 
about the centre of body.  Ercretory duct Opening at +45” from anterior extremity. 
Lateral vessels commencing in usual way, at 1455" from head. 
Male, not seen. 
Hab. Between the lower part of the sheaths of leaves of wheat-stalks taken from à 
stubble-field with sandy soil, Broadmoor, Berks. 
8. P. GRANULOSUS, n.sp. (Plate X. figs. 93, 94.) 
Female, length 35”, breadth 415". 
External FR —Body opaque-white, narrow at anterior extremity, but not 
tapering in either direction so much as usual. Head rather truncate, unarmed. Strie 
transverse. Whole body much obscured by a number of rather large colourles 
granules. 
