17fi CALIFOKNIA ACADEMY OP SCIENCES. 



PLATE XL VI. 



BENHAMIA PALMICOLA. 



0. Longitudinal section of the genital somites. 



BENHAMIA NANA. 



1. A specimen; natural size. 



'2. The ventral side of the anterior somites, showing the exterior pores, etc. 



3. The ventral side of the most anterior somites, showing the everted pharynx and the very narrow somite i, etc. 



4. Side view of the same somites. 



5. The anterior twent}' somites laid open, exposing the various organs, etc. The alimentary canal is removed 



and the whole figure is held somewhat schematic, atr. thickened part of the spermducts. 



6. Part of a posterior somite viewed from the inner side, showing the relative position of set.'B and uephropores. 



1, 2, 3, 4 refer to the setas; a, b, c to the uephridia. 



