910 J- Stafford. 



side, and the ascending limb is similarly arranged up tlie otlier side, 

 botli series being between the intestinal caeca; there are no loops 

 outside of the caeca. It passes from side to side between the testes 

 and between the first testis and the ovary and, on account of the 

 small size of these bodies, there is room for several coils. 



The egg agrees pretty well in length with tliat of No. 3, but 

 is a shade snmller, elliptical with ends nearly equal, but sometimes 

 more oval with the centre of the large end flat and the small end 

 blunt-pointed. The size is •028X-018 mm. 



I have two yonng worms, 18 mm long by '5 mm broad, wliicli 

 I tliink must belong to tliis species. They were found together 

 with some of both No. 4 and No. 5. There are no eggs in the 

 Uterus which extends to the posterior end and back again without 

 coils. The caeca are broad with brown contents. The ventral 

 sucker is in the middle of the animal and is -15 mm across, while 

 the oral sucker is •22X-24 mm. No spines are preserved. They 

 appear quite different from my youngest specimens of No. 4. 



Montreal, Feb. 12, 1902. 



Explanation of the flgures. 



Plate 33. 

 Fig. 1. Ilaeinaloloechns longiplcxus. 

 Fig. 2. Haemaioloeclms hreriplexus. 



MS mouth-sucker. 



Pli phai-ynx. 



GO genital opening. 



Pc penis-sack, below it the Oesophagus. 



I right intestinal caecum. 



V vitellaria. 



VS ventral sucker. 



RS receptaculum seminis. 



ovary. 



MU median part of uterus. 



T posterior testis. 



PU posterior-lateral fold of uterus. 

 Fig. 3. Ilacmatolocchus varioplrxiis. ^_ \ 



Fig. 4. Haematohcchns s'miiliplexus. 

 Fig. 5. Ilaematoloeclnis mediojilexus. 



All drawn from the ventral surface , under the same magnification, 

 tbeir parts easily determined by reference to Fig. 2. 



