196 CALIFORNIA ACADEMY OF SCIENCES. 



PLATE LVI. 



SPAEGANOPHILUS SMITHI. 



130-136. Cross-sections through various somites. The details are indicated diagi-ammaticall)'. The Eoman numer- 

 als iudicate the number of the somite or somites through which the section passes, s. 7n. septal muscles. 

 a. s. gl. accessory septal gland of septum between somites ix and x. spz. i. spermatozoa in spermtanks. spz. s. 

 spermatozoa and spermatogonia in sperm-sacs. os. ovisac, a. m. t. arciform muscles of tubercula puber. 

 tatis, connecting the opposite surfaces of the tubercula pubertatis. a. m. c. arciform muscles passing from 

 opposite sides of clitellum through the coelomic cavity. 



137. Section through sacculated intestine, bl. c. blood capillary reticulum. 



138. Tubercula pubertatis, Zeiss Hom. Im. /,. of. m. arciform muscles passing through coelom. a/, t. arciform 



muscles confined to the epidermal cells of the tubercula. 



139. Section through the body-wall through one of the prostates, r. m. retractor muscles passing to the cuticle 



and the outermost epidermal cells, ct. connective tissue. 



SPAEGANOPHILUS CAENEUS. 



140. Two spermathecie from the same specimens. The free or apical end is seen to be almost globular. 



SPAEGANOPHILUS GUATEMALENSIS. 



141. a and b. Two spermatheca>. The apical end is flat and trawl-like, bearing a sac-like pouch which connects 



with the interior of the spermatheca, through a small slit. 



DELTANIA TEOYEEI var. CEASSA. 



142. A prostate gland with peuial setie. 



143. A spermatheca. 



DELTANIA TEOYEEI var. LAGUN.*;. 



144. One of the peuial seta? with the tip more highly magnified. 



145. Two spermathecsB, both from the same specimen. A and B are seen from the broad side, C from the narrow 



side. 



146. Two prostates with peuial setas. A is seen from the flat side, B is seen from the broad side. 



147. Section of one of the ovisacs. Zeiss /i,, Hom. Im. 



