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PROCEEDINGS OF THE AMERICAN ACADEMY. 



discharging the secretion, or it would happen frequently and there 

 would be more than this one instance in the several animals studied. 

 But the large number of these bodies in the immediate vicinity of the 

 glandular patch is very suggestive, and leads one to think that these 

 bodies are escaped nuclei. The ends of some of the other cells in the 

 glandular patch were frayed, as if the distal part had been lost. 



8. The Genital Ducts. 



1. The hermaphroditic duct emerges from the central and dorsal 

 region of the posterior genital mass. As it leaves the genital mass it 



^- rtp.sem. 



Figure 8. Drawing made partly from a dissection and partly from a recon- 

 struction from sections, to show the prostate gland, its duct, the oviduct, 

 and their relation to the hermaphroditic duct and receptaculum seminis. 

 dt.her., hermaphroditic duct; dt. prost. + cop., prostate and copulation duct; 

 gl.prosL, prostate gland; o'dt., oviduct; rcp.sem., receptaculum seminis. 



turns, passing to the left side, and continues in this direction until it 

 comes into contact with the body wall, where it turns forward. It then 

 bends ventrally, and finally reaches the middle of the front surface of 

 the anterior genital mass. Here it makes a sharp turn to the right, 

 passing below the esophagus, and becomes partly enveloped by the 

 nidamental gland. As the hermaphroditic duct emerges from the an- 

 terior right side of the anterior genital mass, it turns ventrally 25 

 micra and enlarges its diameter from 3 to 15 micra to form an ampulla. 

 From the ampulla the duct courses dorsally over the right anterior 

 surface of the nidamental gland and opens into the duct of the pros- 



