290 CALIFORNIA ACADEMY OF SCIENCES. 



t. testes. 



r. /■. ciliated rosettes. 



h. hearts. 



.s. i. sacculated intestine. 



ces. oesophagus. 



.s. septa. 



d. V. dorsal vessel. 



c. V. ventral vessel. 



Fig. 71. O.sonorce. The anterior somites, side view. Letters indicate 

 the same as preceding figure. 



Fig. 72. 0. Hendrki. The male pore. 



Fig. 73. O. sonority. The male pore. 

 a. side view. 

 h. front view. 



Figs. 74 to 82. Setre of the various species of Oenerodrilus described in 

 this paper. The figures have all been drawn to the same scale, 

 with camera, and represent the relative size of the seta in the vari- 

 ous species. The drawing was made of one of the inner couples im- 

 mediately behind the clitellum. 



Fig. 74. Seta of 0. Beddardi. 



Fig. 75. Seta of 0. sonora'. 



Fig. 76. Seta of 0. guntemahe. 



Fig. 77. Seta of 0. Hendriei. 



Fig. 78. Seta of 0. UmicoUi. 



Fig. 79. Seta of O. lios,^. 



Fig. 80. Seta of O. contractus. 



Fig. 81. Seta of 0. agricola. 



Fig. 82. Seta of O. occidentaUs. 



Fig. S3. O. Hendriei. The prostate. 

 ]>r. prostate. 

 sp. d. sperm duct. 

 i\ fjl. ventral ganglion. 



Fig. 84. The oesophageal diverticulum of (>. occidentaUs. 



Fig. 85. The oesophageal diverticulum of (>. .sonorte. 



Plate X. 

 Figs. 86 to 91. Diagram of the organs of various genera showing relation- 

 ship) with Oenerodrilus. 

 Fig. 86. Oenerodrilus. 

 Fig. 87. Gordiodrihis. 

 Fig. 88. Pontodrilus. 

 Fig. 89. Photodrilus (after Benham). 

 Fig. 90. Microscolex (after Benham). 

 Fig. 91. Pygmckodrilus (after Benham). 



