184 CALIFORNIA ACADEMY OP SCIENCES. 



PLATE L. 



BENHAMIA PALMICOLA. 



53. Part of the iutestiue and hearts dissected out. 



54. Prostate and sac with penial setas. 



BENHAMIA EUGOSA. 



56. The ventral side of clitellum, showing the copulatory papillae on which are situated the anterior prostate pores 



in xvii. The clitellum is much crenulated. 



57. Anterior somites seen from above, showing jirostomium, somite i, ii and iii, the first of which is much swollen. 



58. The same seen from the side. In these two figures somite i is retracted in the buccal cavity. 



59. Another specimen; the anterior somites, but i, is fnlly extended. 



60. Larger penial setas, free end. 



61. Smaller penial setae. 



63. A partly diagrammatic representation of the interior surface of a posterior somite, showing the nephridia. 

 1, 2, 3, 4, small, refer to setce; 1, 2, 3, 4, large, refer to nephridia. 



ALEODRILUS KEYESI. 



66. A specimen, natural size. 



67. The anterior somites seen from the ventral side, showing the generative pores and the position of setfe. 



68. Prostomium and somite i. 



69. The sexual foss.-e and papillfe. 



70. A somewhat diagrammatic view of the anterior somites, composed from several longitudinal sections. 



