108 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
tinal cells not distinctly tessellated, and containing light-coloured fat-particles. Anus 
+43” from posterior extremity. Vulva in the middle of body. 
Male not seen. 
Hab. With Diatomaceæ, on the decaying lower leaves of Myriophyllum verticillatum 
from pond, Bagshot. 
7. D. POLYBLASTUS, n. sp. (Plate X. figs. 50, 51.) 
Male. Length 45", breadth 555 . 
External Characters.—Body long and thread-like, tapering but very slightly at either 
extremity. Head rounded ; no papillæ. 
Spear toyo” long. (Esophagus 3th of total length; posterior half enlarged. Intestinal 
cells moderately developed, and containing light-coloured fat-particles. Anus 71," from 
posterior extremity. 
Spicules 543" long. Suckers 16-20, in mid-ventral region, commencing at 4117" above 
anus, and occupying a space of about 355”. 
Female not seen. 
Hab. With Tylelenchus Davaineii, from moss coating a large boulder in freshwater 
stream, Falmouth. 
8. D. PAPILLATUS, n. sp. (Plate X. figs. 52, 53.) 
Female. Length 455", breadth 414". 
External Characters.—Body opaque-white, tapering gradually anteriorly, but not 
posteriorly, where it is blunt and rounded. Head truncate, provided with a coronet of 
six large papille. Integument with longitudinal strize 445,5" apart. 
Spear 565 long. Œsophagus Ath of total length, gradually widening posteriorly. 
Intestinal cells abundant, tessellated, containing light-olive-coloured particles. Anus sts 
from posterior extremity. Vulva near the commencement of middle third of body. 
Uterus symmetrical. Lateral cell-canals very distinct, owing to their contained granules 
being of a light olive-colour. 
Movements very sluggish. 
Male not seen. 
Hab. Between the lower sheaths of the leaves of the Giant Fescue (Festuca elatior), 
Broadmoor, Berks. 
9. D. TORPIDUS, n. sp. (Plate X. figs. 54-50.) 
Female. Length -L”, breadth I. 
External Characters.—Body tapering gradually anteriorly, but more suddenly s 
posterior extremity, which is acuminated. Head truncate, provided with four small 
crucial papillz. Integumental markings not apparent. 
S dn - fe Œsophagus about 1th of total length ; posterior half enlarged. ir 
oes Having a tessellated arrangement. Anus 515” from posterior extremity. 
- Vulva slightly posterior to middle of body. 
