/ 



120 MR. II. CHARLTON BASTIAN'S MONOGRAPH 



5. P. ACUMiNATUs, n. sp. (Plate X. figs. 87, 88.) 



Female, length g^j", breadth -g^". 



External Characters. — Body white, tapering at both extremities, especially at posterior, 

 which is narrow and acuminated. Ilead rounded, unarmed. Integumcntal striae trans- 

 verse, Tcrooo" apart. 



Pharyngeal cavity narrow, elongated, rrrx" long. CEsophag^is about ^th of total 

 length. Intestinal cells very indistinct, from their containing very few light-coloured 

 fat-particles. Anus ^-g^ " fi'om posterior extremity. Vulva in middle of body. Excre- 

 tory duct opening opposite the middle portion of oesophagus. Lateral vessels com- 

 mencing in the usual way, at awo" from anterior extremity. 



Male, not seen. 



Hah. In moss. 



G. P. PARVUS, n. sp. (Plate X. figs. 89, 90.) 



Female, length ^f", breadth t^oV- 



External Character's. — Body white, tapering anteriorly and posteriorly, especially in 

 the latter direction. Head rounded, unarmed. Striae transverse, 30000 " apart. 



Fharyngeal cavity Xiws" long. (Esojihagiis about ^th of total length. Intestinal 

 cells very indistinct. Ami.s 3-577" from posterior extremity. Vulva at middle of body. 

 Excretory duct opening opposite middle of oesophagus. Lateral vessels commencing at 

 integumcntal circles ^^oq" from anterior extremity. 



Male, not seen. 



Mab. With P. vclox, from moss covering stone lying in a freshwater stream, Fal- 

 mouth. 



7. P. TRiTici, n. sp. (Plate X. figs. 91, 92.) 

 Female, length xo", breadth 437". 



External Characters. — Body white, tapering slightly anteriorly, but more posteriorly. 

 Head rounded, unarmed. Transverse striae readily seen, ttsott" apart. 



Tharyngeal cavity g^" long. (Esophagus only \i\\ of total length. Intestinal cells 

 containing few light-coloured fat-particles. Anus -g^ 0" fi'om posterior extremity. Vulva 

 about the centre of body. Excretory duct opening at xsV' from anterior extremity. 

 Lateral vessels commencing in usual way, at ruW fi'om head. 



Male, not seen. 



JSab. Between the lower part of the sheaths of leaves of wheat-stalks taken from a 

 stubble-field with sandy soil, Broadmoor, Berks. 



8. P. GRANULOSUS, n. sp. (Plate X. figs. 93, 94.) 

 Female, length -^", breadth -5^0". 



External Characters. — Body opaque-white, narrow at anterior extremity, but not 

 tapering in either direction so much as usual. Head rather truncate, unarmed. Striae 

 transverse. Whole body much obscured by a number of rather large colourless 

 granules. 



