950 EEPOET OF COMMISSIONER OF FISH AND FISHERIES. [72] 



EXPLANATION OF PLATE XHI. 



Fig. 12.— Limnodeilus Silvani. 



Fig. 12 a. — The worm, large form, natural size, 

 12 6. — The worm, smaller form, natural size. 

 12 c. — One of the spines. 

 12 d. — The front part of the same spine. 

 12 e. — Cephalic ganglion, broadest form. 

 12/. — Cephalic ganglion, longest form. 

 12 g. — One of the receptacles. 

 12 h. — Spermatophore. 

 12 L — Spermatophore. 

 12 j. — Spermatophore. 

 12 le. — Spermatophore. 

 12 I. — Spermatophore. 

 12 m. — Spermatophore. 

 12 n. — One of the segmental organs. 

 12 0. — The interior aperture of the same organ. 



