360 



ANIMAL PARASITES. 



Fig. 3. Kg- 4 - 



broad branch to the stomach, which divides into a central branch 

 and a smaller lateral one. The broad branch runs round the 



the surrounding three-cornered enlargements (organs of taste). b. Oesophagus. 

 c. Stomach, d. Intestine, e. Anal aperture with its circular sphincter and ohlique 

 muscles and sucking-disc. g l and g 1 . Two tuhes proceeding from the same and running 

 down by the side of the alimentary canal, h. Sarcode-tubes containing cellular drops, 

 reddish vesicles (nuclei), and in these transparent corpuscles, i. Female generative 

 opening with the cleft uterus proceeding from it. k. Epidermis of the anal and oral 

 aperture covering the corium. I. Lateral fat-canals, m. The three-pointed tail. 

 Nervous system ; o. Upper lateral oesophageal ganglion, p. Lower ditto ; both are 

 united in the middle by a transverse ganglion, q. Encircling of the ventral cord 

 around the female generative aperture, r. Lenticular anal ganglion, s. Last ganglion 

 of the tail. t. Union of the oesophageal ganglia with the inner fibres of the common 

 ventral cord. 



Fig. 3. Cerebral ganglia (brain). o. The upper lateral oesophageal ganglion. 

 o'. Ganglion lying on the ventral surface under the oesophagus, p. The lower lateral 

 oesophageal ganglion, p'. Ganglion supplying the sucking-disc. t. Union of the two 

 lateral branches of the ventral cord. h. Sarcode-tube. I Lateral fat-canals. 



Fig. 4. Caudal ganglia, r. Lateral pyriform ganglion, r'. Transverse band uniting 

 the two ganglia upon the dorsal surface, r". Globular enlargement of the lateral 

 ganglia, r'". Reniforra transverse ganglion. s. Last caudal ganglion. .r. Single 



