360 



NKMATHELMINTHES. 



layer of the integument lies a complicated system of canals, filled with 

 a clear fluid containing granules. Beneath the internal layer of the 

 integument, which layer is often very extensive and of a yellow 

 colour, is placed the powerful muscular tunic ; it is composed of 

 external transverse and internal longitudinal fibres, and bounds the 

 body cavity. The complicated ramified system of dermal canals, of 

 which two principal longitu- 

 dinal trunks may be recog- 

 nised, is filled with juices, 



and probably functions as a 



nutritive apparatus. The 



portion of this system which 



extends into two bodies (the 



lemnisci, fig. 289, Le} project- 

 ing behind the proboscis 



through the muscular tunic 



into the body cavity, probably 



acts as an excretory organ, 



since the contents of the fre- 

 quently aiiastomising canals 



of these lemnisci is usually 



of a brown colour, and consists 



of a cellular mass rich in 



concretions. According to 



Schneider, the vessels of the 



lemnisci open into a circular 



vessel in the integument, and 



only communicate with the 



network of canals in the 



cephalic region, while the 



other dermal vessels (nutritive 



FIG. 290. Male of EcM- 

 nortiynai* antjuttatu* apparatus), the contents of 29L Generative 



(aftpr R LpiiplrarH i i TJS? i- , i ducts of a female 



(.CULM H. ijeuckait). w V|ir>|) (hftpTs from that, of f,hp w i ? i 



22, proboscis; Xi, Echuwrliynchus g lffas 



sheath of the probos- vesselsof the lemnisci, are Com- ( aft er A. Andres). Li, 



cis; Li, ligament; p l ete ly shut off from the latter. 

 G, ganglion ; Le, lem- * 



nisei; T, testes; iv, Generative organs. The 



vasa deferentia; Pr, 11 , ,1 n 1-1 



prostatic sacs- De b d y Cavity through which vagina; B, lateral 



ductus ejacuiatorius; fluids circulate encloses the ^ hes f " ie bel l 1; 



P, penis ; fi, retracted '"'' dorsal ceils at the 



greatly developed generative 1)as e of the bell ; GI, 



shapedflocculi; F',F", 

 appendages of the 

 same ; V, uterus ; T', 



Jmrsa. 



lateral cells. 



organs, which are attached 

 to the end of the sheath of the proboscis by a ligament (figs. 290 



