EXPLANATION OF PLATE XLVII. 



Fhreodriloides nofabilu, Benliani. 



„ 13, A ventral chata. 



„ 14. View of part of the male apjjaratus of the left side as seen in a 

 stained sjjecimen mounted entire ; the sperm duet and funnel 

 are omitted. A. the great muscular sac; S. the spherical, 

 glandular sac, into which the sac A. opens on its mesial face; 

 m. muscles ; o. the male pore. 



„ 15. Diagranniiatic reconstruction of the male apparatus, as seen in longi- 

 tudinal section. A. the muscular sac ; B. the glandular sac ; ce. 

 nucleus of coelomic epithelium ; cm. circidar muscles in wall of 

 A. ; ep nucleus of epithelium lining A. ;f. sperm funnel ; c/l. ep. 

 glandular ej^itlielium of B. ; m. muscles around B. ; o. male 

 pore ; s. septum xi./xii. ; *p. sperm duct. 



„ 16. Obliquely transverse sections through the muscular sac (A) at the 

 level of the entrance of the sperm duct. (Camera outline x 

 480, slide ii., row 2, sect. 2, right side). r. ep. nucleus of 

 coelomic epithelium ; cm circidar muscle fibres ; ep. nucleus 

 of epitheliimi lining the muscular sac A ; ep. two cells bounding 

 the entrance of the sperm duct into the muscular sac ; sp. 

 spermatozoa filling the musciUar sac ; ipd, the sperm duct in 

 section. 



„ 17. Obliquely longitudinal section through the glandular sac (5), near 

 the entrance into it of the muscular sac (A). (Camera outline 

 X 480, slide ii., row 2, section 15, right side). On this 

 side of the body the lower end of the muscular sac, filled with 

 spermatozoa, pushes the lining epithelium of the glandular sac 

 outwards, and the eonnnunication between the two is found a 

 few sections furtlier on, at the level .r. of the figure ; ep. 

 epidermis and epithelium of non-glandidar portion of the 

 glandidar sac ; (^l. ep. glandidar epithelium ; m. muscles ; tic. 

 portion of nerve cord ; o. male pore. 



