114 CALIFORNIA ACADEMY OF SCIENCES. 
PLATE XLI. 
ECLIPIDRILUS FRIGIDUS. 
78. A diagrammatic figure of the region of the reproductive organs, including somites ix to xvii, showing the arrange- 
ments of the reproductive organs. The body-wall is represented as being cut open dersally and spread out. 
br, the bridge or narrow part of the prostate connecting the wide and lower part with the storage chamber of 
the spermatozoa, str. storage chamber of spermatozoa. The prostate and ciliated rosettes are somewhat 
stretched, as otherwise they could not be seen both at the same time. 
79. Part of the clitellum in transyerse section, showing the clitellar glands, the longitudinal and transverse muscu- 
lar layers. 
80A. One of the blood glands or herzkérper. 
80B. A single gland cell of the former. 
81. A transverse section of the dorsal vessel, showing the blood gland occupying the yentral part of the vessel. 
82A. Cross-section of the lower part of the spermatheca, at the spermathecal pore. bd. body-wall. ep. inner lining 
epithelium. m. muscular transverse layer. ex. exterior layer. /. m. longitudinal muscular layer of the 
body-wall. ¢. m. transverse muscular layer of the body-wall. 
82B. Cross-section of the distal end of the spermatheca. 
