KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 15. N:0 7. 47 



PLATE X. 



Fig. 19. Neoenchytrceus Vejdovskyi n. sp. 

 a = the worra, nat. size. 

 b = the front part seen from above. 

 c = the Lind part seen from above. 

 d = a bundle of spines. 



e = another bundle of spines from the side of the segment. 

 / = the front part of the nervöns system seen from above. 

 g = the receptacle. 



h = the efferent duct and penis, showing the peculiar and characteristic foldings of the tube. 

 k = perigastric cells. 



Fig. 20. Neoenchytrceus hyalinus n. sp. 



a = the worra, nat. size. 



b = the front part, seen from the side. 



c = the hind part, seen from the side. 



d = a bundle of spines showing their relative size and number. 



e = a single spine, still more magnified. 



/ = the front part of the nervous system, seen from above. 



g = the receptacle, seen from the side. 



h = the same receptacle, seen from another side. 



k\ 



]{ = the same receptacle, seen from other sides. 



m = the efferent duct with a bundle of spermatozoa in the interiör orifice. 



PLATE XI. 



Fig. 21. Neoenchytrceus callosus n. sp. 



a = the worm, nat. size. 



b = the worm, nat. size, a larger form. 



c = the front part, seen from above. 



d = the hind part, seen from above. 



e = two bundles of spines, one from the middle, one from the side of the same segment. 



/ = a single spine, still more magnified. 



g = the front part of the nervous system, seen from above. 



h = the receptacle, seen from the front. 



k = the top of the same receptacle seen from the side. 



m = transversal section of the same receptacle. 



p = the receptacle from another individual. 



q = another receptacle, more contracted. 



r = the efferent duct furnished with a characteristic enormous bundle of spermatozoa projecting from 

 the interiör orifice. 



s = an efferent duct from another individual not so much developed. 



t = the efferent duct from another individual, the vesicle being of unusual form. 



m = a layer of perigastric cells, the cells being always connected, forming a continual stratum or layer in 

 each segment. 



PLATE XII. 



Fig. 22. Neoenchytrceus Ratzeli Eisen. 

 a = the worm, nat. size. 



b = the front part of the nervous system, seen from above. 

 c = the receptacle of the spermatozoa. 



