a - Art. 3.— T. Kalniraki : 



Colour. — The living animals are generali}' of. a uniform milk}^ 

 white colour, but sometimes light lu-own, according to the charac- 

 ter of intestinal contents. Any trace of pigments can nowhere be 

 detected. In the hind region there usually exists a light spot 

 wliich doubtless shows the position of the copulator}^ organs. 



JEyes. — The two crescentic eyes are closely approximated and 

 situated far behind the head end, the distance between them being 

 about half that from the eye to the lateral margin of the head of 

 the same side. 



Digestive Organs. — The mouth is situated nearly between the 

 middle and the posterior thirds of the body. The insertion of 

 pharynx takes place at a short distance in front of the middle of 

 the body. The anterior main trunk of the intestine is provided 

 with 8-10 pairs of lateral branches, while the posterior trunks are 

 usually united at the hind end, each giving off at least 10 lateral 

 branches. 



Genital Organs. — The genital aperture lies in front of the 

 middle of the posterior third of the body. The genital atrium is 

 divided into two chambers ; the vestibulum presents a vertically 

 ascending and laterally outbulging and wide lumen. ^ Numerous 

 testes are situated ventrally along both sides of the anterior 

 gut trunk, extending from the ovaries to the dividing point of the 

 gut trunks. The vasa deferentia are united in the upper part of 

 tlie penis bulb before opening into the vesicula seminalis, which is 

 not wide, passing below into the slender ejaculatory duct. The 

 intromittent part of the penis is of a conical shape and is subverti- 

 cally disposed. The paired ovary is spherical in shape and oc- 

 cupies a ventral position between the first and second pairs of the 

 gut branches. The oviducts open separately into the genital 

 vestibulum at the upper end, where the small receptaculum also 

 opens b}^ a short stalk (vagina) from behind. 



Anatomy . 



Integument. 



The epidermis consists, as usual, of ciliated cul)oidal or cylin- 



