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



^ EXPLANATION OF PLATE IX. 



Eudrilus Eiigenice (Kinberg). 



Fig. 49. Longitudinal section of the female apparatus, constructed from a 

 number of longitudinal sections of the body; ov. 2, posterior 

 ovary in XIII; ov. i, anterior ovary in XIII; ovd. ov. 2, oviduct 

 from posterior ovary, connecting at X with the spermatheca; ovd. 

 ov. /, oviduct from anterior ovary. 



Fig. 50. A transverse section of the body, constructed from small sections 

 passing through the female apparatus. Letters as in fig. 49. 



Figs- 51-54- Lacking. 



Ocnerodrilus (Nematogenia) lacuum Beddard, panamaensis var. nov. 



Fig. 55. A specimen natural size, fixed in formalin. 



Fig. 56. The anterior somites, constructed from several longitudinal sections. 

 Details only indicated; ly. gl. lymphatic tissue; i. li., inner lips of 

 pharynx. 



Fig. 57. Spermatheca. 



Fig. 58. Section of the wall of the pouch of the spermatheca, showing the 

 wide terminal pockets of the secreting cells; Zeiss, Apo. 2 mm., 

 Oc. 4. 



Fig. 59. Surface view of the two prostates and part of the sperm-ducts, 

 illustrating the muscular and glandular parts, their size and 

 position. 



Fig. 60. A dissected prostate, showing copulatory papilla, with pores of 

 sperm-duct and prostate, the former opening posterior to the 

 prostate. 



Fig. 61. Surface view of one of the male papillae, showing the openings of 

 the sperm-ducts and prostates close to each other. 



Fig. 62. Detail of a transverse section of the body-wall through the male 

 and prostate pores. The former is dotted. 



Fig. 63. Section of the prostate in somite nearest the male pore; muscular 

 and connective tissue layers as well as epithelial glandular cells, 

 with large discharge pockets. 



Fig. 64. Section through prostate in the fourth segment fropi the male pore. 

 Two kinds of glandular cells, some very large, others quite nar- 

 row. The latter resemble those found in the glandular part of the 

 prostate. The part through which this section passes does not 

 belong to the glandular part of the prostate, but to the muscular 

 part. The large glandular cells are absent from the strictly gland- 

 ular part, in which all the cells are columnar and narrow. 



Fig. 65. Part of the septal gland in somite VIII, with lymphatic tissue and 

 lymphocytes along the margin; Zeiss D., Oc. 6. 



Fig. 66. Lacking. 



Fig. 67. Nephridium. 



