182 (lAMFORNIA ACADEMY OF SCIKNCKS. 



PLATE XLIX. 



BENHAMIA PALMICOLA. 



46. A somewhat diagrammatic Hgure, composed from several lougitiidiual sections, s. org. pr. sense organ zone 



of the prostomium. s. org. h. the sense organ zone of the body wall, on the equatorial line of the somite. 



47. Some of the sense organ cells of the prostomium more highly magnified. Zeiss. 12; Hom. Im. Eyrp. i. The 



sense cells are seen in the center between the pellncid sac-like cells. Between the sense cells are seen nuclei 

 of supporting cells. 



48. Part of a posterior somite laid open, showing the three nephridia on one side. 



49. A part of a nephridial cell mantle, showing various kinds of cells, some of which appear to contain calculi. 



50. Cephalic ganglion, etc. 



51. The spermathecal zone seen from the inner side of the body. The large globular apical part of each sperma- 



theca is situated in the somite posterior to the pore. 



52. Outlines of the spermathecas of various e.'itra African species of Benhamia, some of which are copied from 



various sources. 

 52A-B-C-D. Spermathecse of Benhamia Bolam, from specimens from Hamburgf kindly furnished by Dr. W. 

 Michaelsen. 



52E. Spermatheca of Benhamia malayana after Dr. Horst. 



52F. Spermatheca of Benhamia floresiana after Dr. Horst. 



52G-H. Two spermatheca? from the same side of a specimen of Benhamia papiUala from Tepio, Mexico. 



521. Spermatheca of Benhamia octonephra after Rosa. 



52K-L. SpermatheciB of Benhamia palmicola from Miraflores, Baja California. 



52M-N. A spermatheca of Benhamia rugosa seen from two differeut sides. 



