218 ARTHUR E. SHIPLEY. 
Fite. x1.—A small portion of the skin in section, showing the single layer 
of circular muscle-fibres. x 40. 
tre. xui.—A median longitudinal section through a female. The whole 
body-cavity full of ova and egg-masses. The ligament is seen in the head, and 
the genital duct near its opening in the trunk. The left lemniscus, cut twice, 
is alone seen. X 80. 
Fic. xtv.—A transverse section through the trunk of a male, showing one 
of the testes. This section shows also the longitudinal muscles on the 
lemnisci and the large lateral lacune, Jat. lac. x 40. 
Fic. xv.—A transverse section through the head of a male, showing the 
brain in the ligament, and the longitudinal muscle-fibres very well developed. 
x 40. 
