Some undescribed Trematodes. 413 



raaterial that I could not tear open with forceps ; they must have 

 measurcd from 3 to 4 mm in length and not quite so much in breadth. 



As tlie aninials appeared veiy sluggisli and somewhat non-trans- 

 parent I was afraid to keep them under Observation for any length 

 of time, in a changed medium, for fear they should becorae more 

 turbid or even die ; I accordingly killed them at once in glacial acetic 

 acid, washed in 70 7o alcohol, stained in alcoholic carmine, dehydrated, 

 deared and mounted in baisam, 



The larger and, judging from the Contents of the uterus, the older 

 of the two measures 1.9 mm in length and 1.28 mm in breadth. It is 

 broadest across the ventral sucker and narrows more towards the 

 anterior than the posterior end. The dorsal wall of the oral sucker 

 projects a little, as a blunt cone, at the anterior end and the posterior 

 end of tlie body has a broad but shallow indentation. 



The mouth sucker measures O.U38 mm across, while the ventral 

 sucker is slightly broader, with its anterior rim in the middle of the 

 length of the animal. 



The cuticle contains spines. 



The expulsion canals diverge from the excretory pore. 



The intestine agrees with the figure given by Looss, but the caeca 

 are nearly filled with brown egg-shells like those in its uterus. 



Its testes are situated right and left of the ventral sucker, at the 

 ends of the caeca, the right one slightly in advance of the left. The 

 penis lies across the ventral surface of the left caecum and Stretches 

 from close to the ventral sucker to a point half way between the caecum 

 and the margin of the body and slightly behind the level of the fork- 

 ing of the intestine. The ovary is placed between the prongs of the 

 intestine but more dorsal and with its outer border overlying the 

 middle of the right caecum, its right border in the median longitudinal 

 axis of the animal. It appears to be a lobed body of irregulär out- 

 line. Corresponding with the shortness of the post-acetabular portion 

 of the body, the uterus does not fall in two long folds, right and left, 

 with smaller secondary folds in the transverse direction, as sliown is 

 the figure by Looss, but the primary folds are transverse and the 

 secondary fall in the direction of the long axis of the worm. If it 

 should turn out, however, that these worms are un-naturally contracted, 

 then that might explain this difierence. I can find no indication of a 

 gelatinous coat round the eggs but here again I must obstain from 

 conclusions until I examine the living animal. 



Vitellaria lie between the testes and the pharynx and are not 



