934 



REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



[561 



EXPLANATION OF PLATE V. 



Fig. 4. — Ilyodeilus fragilis. 



Fig. 4 a. — The worm, natural size. 

 4 ft. — The cephalic ganglion. 



4 c. — One of the forked and one of the hair-spines. 

 4 d. — A part of the segment containing the efferent dnct, showing the di8tanc| 



between the exterior opening of the penis and the ventral ganglion. 

 4 e. — Efferent duct, atrium, penis, and oviduct. 

 4 /.^^One of the receptacles. 

 4 g. — The interior aperture of one of the segmental organs. 



