BIHANG TILL K. SV. VET.-AKAD. IIANDl-. BAND. 3. N:0 13. 11 



EXPLANATION OF THE PLATES. 



PLATE I. 



Fig. 1. Side view of Neomenia carinata in a contracted state ; natural size ; 



a, mouth ; b, anus. 



Lower view of the same ; a, moutli ; b, anus ; c, ventral furrow. 

 Upper view of the same. 

 Lower view of an extended specimen, natural size ; a, mouth ; 



b, anus; c, ventral furrow. 

 Side view of the same ; a, mouth ; b, anus. 

 Longitudinal section of a contracted specimen; a, mouth; b, an- 

 terior part of the pharynx entirely drawn in ; c, posterior part 

 of the same : cl, stomach ; e, tranversal lamella ; /, rectum ; g, 

 anus : h, longitudinal lamellse in posterior part of rectum ; i, in- 

 tegument ; Ä, ventral furrow ; I, vertical passage ; w-, one of the 

 longitudinal folds in the bottom of the ventral furrow; n, the 

 longitudinal canal; o, rudimental body-cavity; 2h supra-esopha- 

 geal ganglion ; q, mushroom-shaped organ not cut through ; r, 

 section of the duct fi'om the left lateral gland ; .•?, cavity in- 

 closing the mushroom-sjjaped organ ; t, leaflike protuberances in 

 this cavity ; w, ovary ; v, egg-laminse in the ovary ; w, transver- 

 sal membranes of connective tissue ; x, egg-bag ; y, z bodies 

 fixed on the posterior wall of this bag. 



Fig. 7. Transversal section of a contracted specimen ; u, longitudinal 



muscle-bands ; /?, ventral nerve-trunks ; y, lateral nerve-trunks ; 



the rest of the letters signify the same as in the preceding 



figure. 

 Fig. 8. Inner view of the contracted pharynx ; letters as in fig. 6. 

 Fig. 9. Longitudinal section of the pharynx, when about to be pro- 



truded ; letters as in fig. 6. 

 Fig. 10. Longitudinal section of the entirely protruded pharynx; letters 



as in fig. 6. 

 Fig. 11. Supra-esophageal ganglion. 

 Fig. 12. Infi-a-esophageal ganglia. 



Fig. 13. Ventral nerve-trunk from an extended specimen. 

 Fig. 14. The same from a contracted specimen. 

 Fig. 15, 16. Nerves from the integument ; a, pigment cells. 



