120 CALIFORNIA ACADEMY OF SCIENCES. 



PLATE XLIV. 



ECLIPIDKILUS FKIGIDUS. 



102. Tli(- ccntiiil i)ait of the dissected prostate and male orgau, as seen when mounted in gum-thus. This lifjure 



represents the narrow part of the prostate or tube, connecting the lower or glandular part with the upper or 

 storage part. The two spermducts are marked much more strongly than they appear and are more spread 

 or separated. The drawing represents views at two ditfereut foci. Zeiss C. Eyep. 3, t. 165. a. the posterior 

 part or storage chamber in which the spermducts open at j. s/i. The anterior end of this chamber is lined 

 by a very thick epithelium, which however rapidly diminishes in thickness backwards, li. the very uaiTow 

 part connecting the posterior storage chamber with the anterior prostate. <•. the anterior prostate, out. 

 outer layers of the storage chamber and prostate, surface views, lu. lumen of storage chamber. Iitm. lumen 

 of prostate. cj>. very thick epithelium at the anterior end of the storage chamber, j. sji. junction of sperm- 

 ducts and storage chambei-. /. r. lateral longitudinal blood vessels, se. septum between xiv/xv. apt. sep- 

 tum between xv xvi. spd. spermducts. br. narrow part of prostate or bridge, r/l. glandular layer of 

 prostate. <;)^ lining-epithelium of prostate, 



103. The anterior end of the storage chamber, dissected, mounted in gum-thus. The focus is set on the inner 



concave surface, showing the junction of spermducts and bridge with the storage chamber proper. »//. the 

 pores where enter the two spermducts. outer, coats of muscles and small prostate glands of the storage 

 chamber, hr. bridge or narrow jiart of the prostate. 



104. Longitudinal section of the body-wall, showing posterior ciliated rosette, etc., behind the male pore. 



10'). The inner end of the former more highly magnified. The letters indicate the same as in the last figure. 

 Only some of the larger prostate glands are figured. Zeiss C. Eyep. 3. 



106. A part of the former more highly magnified. Zeiss Horn. Im. 1-1'2, Eyep. 3-l.">5. The letters indicate the same 

 as in lig. 104. This section is more parallel with the longitudinal axis of Ihe organ. The cell walls of the 

 epithelial cells were not distinct, probably on account of maceration. 



