NEW TRBMATODES FROM XtEPTILES. 685 



bodies, with entii'e margins, and tlieir long axes lie nearly in the 

 longitudinal axis of the body. They measure •5--7 mm. in length 

 and •4--5 mm. in breadth. They are most remarkable, however, 

 for their great thickness, which is equal to or greater than the 

 breadth. They thus occupy ueai'ly the whole body -thickness, a 

 fact which prevents them being obscured by the uterus. They 

 ai'e separated fi'om each other by the wide ascending limb of the 

 uterus, against which they press, and their outer margins are 

 closely apposed to the intestin.al diverticula. 



The ovary is situated over the right posterior quadrant of the 

 ventral sucker, a short distance behind the end of the cirrus- 

 pouch. Tt projects well beyond the sucker, and is transversely 

 oval, measuring -35 mm. x '28 mm. It lies close up to the dorsal 

 surface of the body. Close to the innei' side of the ovary and 

 a little behind it, lies a large shell-gland, with a shoi-t ootype. 

 A receptaculum seminis is absent, but Laurer's canal is present. 

 The yolk-glands are rtfther voluminous. They are entirely 

 lateral and peripheral, and they extend from the level of the 

 genital aperture, or rather behind it, to near the posterior border of 

 the right testis. Here, again, the anterior limit is fairly constant, 

 but the posterior limit is somewhat variable, less so, however, than 

 in the two species ali'eady described. The follicles are large and 

 arranged in regular dentlritic groups. All the follicles are 

 connected up by short ducts. They lie close under the surface 

 of the body, extending widely under tiie dorsal surface, but being 

 much moi'e resti-icted ventrall}^ where they do not overlap the 

 inner wall of the intestinal diverticula. 



The uterus is large and voluminous, but is not much convoluted. 

 It is intermediate in type between that of ReniferRiad Ochetosoma, 

 but resembling the former more than the lattei-. It consists of 

 a small descending limb, which has a dox'sal position and contains 

 a considerable number of ova. This i"uns to the posterior end of 

 the body where it foi-ms a small convoluted knot, a fairly sym- 

 metrical pail- of loops, one on each side, ))eing thi'own up towards the 

 ends of the intestinal diverticula. From this knot emerges the 

 ascending limb, which rapidly widens but does not attain its 

 maximum width till it has passed in front of the testes, it is 

 never so enormously dilated as in Lechriorchis tmlidus. Near the 

 middle of the ventral sucker it runs into a remarkably powerful 

 vagina, which is as long as or somewhat longer than the cirrus- 

 pouch. The vagina possesses unusually muscular walls, there 

 being a very thick layer of longitudinal fibres and an equally 

 thick layer of circular fibres. It is surrounded by a great mass of 

 peri-vaginal cells, and it is lined by a thick layer of cuticle from 

 which small regular cuticular processes extend into the lumen. 

 The ova are numerous, dark brown and oval, with large well- 

 marked operculum. They measure -OSS-'OS? mm. in length and 

 •016-*019 mm. in breadth, the usual size being '036 x "018 mm. 



The genus Dasymetra may be defined as follows : — 

 Lepodermatidse ; with modei'ately flattened body, entirely covered 

 Proc. Zool. Sou.— 1 9 11 , No. XLVIII. 48 



