184 CALIFORNIA ACADEMY OP SCIENCES. 



PLATE L. 



BENHAMIA PALMICOLA. 



53. Part of the intestine aud hearts dissected out. 



54. Prostate and sac with peuial setic. 



BENHAMIA RUGOSA. 



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



in xvii. The clitellum is much crenulated. 



57. Anterior somites seen from above, showing prostomium, 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 cavitv. 



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



60. Larger peuial setic, free end. 



61. Smaller penial setai. 



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

 1, 2, .3, 4, small, refer to seta>; I, 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 setsB. 



68. Prostomium and somite i. 



69. The sexual fossiu and papillo). 



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



