140 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



The lower part of the spermatheca is much wider in my 

 specimens than in Beddard's, judging from his figure 

 referred to above. The figures representing the female 

 reproductive system were drawn from a number of sections, 

 (fig. 49 from longitudinal, fig. 50 from cross-sections). 

 They are, of course, partly diagrammatic, but it was the 

 endeavor to reproduce the relative proportions as faithfully 

 as possible. 



As regards septum XIII/XIV, it was found to be perfect 

 all along the body-wall and between it and the female 

 organs. In the center, however, it is defective or entirely 

 absent. 



Male Apparatus. — (figs. 44, 48). This very complicated 

 set of organs differs somewhat from the description and 

 figures of Eudrilus sylvicola (EugenicB) as given by Bed- 

 dard. In a general way, Beddard's description fits the 

 specimens in question, but the positions of various parts is 

 different. In one respect, however, Beddard is in error, 

 provided, of course, that we have studied the same species. 

 Beddard states (62) that the longitudinal groove of the 

 penis opens into the lumen of that organ. This is not the 

 case in the Eudrilus Eugenim from Panama. The penis 

 possesses a groove just as stated by Beddard, but it does 

 not open into the canal of the penis at the junction with the 

 bursa, it simply ends bluntly at the base, while at the apex 

 it joins with, and ends at, the exterior opening of the canal 

 of the penis. The groove is therefore entirely an exterior 

 structure along its whole length. Its object is not difficult 

 to perceive. Because of its peculiar position the groove 

 can readily be brought close to the pore of the Y-gland, as 

 shown in figs. 44 and 46 at X. Any discharge from the 

 gland at any point from the base to the apex will therefore 

 be caught in the groove and conducted to the orifice of the 

 penial canal, there to be mixed with the exuding contents of 

 the prostates. 



Four specimens were sectioned in order to ascertain the 

 structure of this organ and all were found to closely agree. 

 In every instance the pore of the Y-gland was found to be 



