116 Annals of the South African Museum. 



by the dotted line. r.ac. g\ I. ac. g', right and left anterior accessory glands. 

 r. ac. g^, I. ac. g-, right and left posterior accessory glands. 



Fig. 25. Transverse section through a <? O. ciiictipes in the region of the lith 



pair of legs (ale. spec, from Dunbrody). A portion of the dorsal surface had been 



cut off for facilitating the embedding process, but the rest of the .section is 



accurately drawn in, without diagrammatising. 



h. c, blood corpuscles. 



ex, eoxal organs (the bracketed lines show the exact extent of the smooth 



cuticula of each organ). 

 d. ej, ductus ejaculatorius, cut through its anterior glandular part. 

 dvs, dorso-ventral muscular septum, dividing the mesial from the lateral 



sinus, 

 dvs', dorso-ventral muscular septmrt, separating the leg cavity from the 



nerve cord. 

 /. b, fat body. 

 h, heart. 



I. ac. g^, left anterior accessory gland, containing coagulated secretion. 

 I. c, central portion of left posterior accessory gland. 



I. V, vesicular portion of left posterior accessory gland, containing coagulated 



secretion. 



II, parts of the nephridium. 



n. o, external opening of the nephridium. 

 n. V, nerve cord. 



jjg. ep, pigmented epithelium of dorso-lateral surfaces. 

 r, rectum. 



r. ac. g^, right anterior accessory gland, containing coagulated secretion. 

 r. c, central portion of right posterior accessory gland. 



r. V, vesicular portion of right posterior accessory gland, containing coagu- 

 lated secretion. 

 r. V. d^ and r. v. d-, left and right portions of the posterior loop of the right 



vas deferens (the line x. y in fig. 15 indicates the places where the loop 



is cut). 

 s^J', sp-, sp3, distal, middle, and proximal spinous pads. 

 11. o, ventral organ. 

 Fig. 26. Section through the 13th left leg of the same specimen (combined 

 from several sections to show the portion of the crural gland which is situated in 

 the cavity of the leg. r.f, fully expanded ring-fold, surrounding the papilla, p, 

 at the apex of which the duct, d, of the crural gland, cr, opens. Other letters as 

 in fig. 25. At cr the crural gland bends sharply, and is continued in an anterior 

 direction for a considerable distance. 



Fig. 27. Cross-sections through posterior part of ductus ejaculatorius (from the 

 same series of sections as fig. 25). a is more posterior than b, and b more 

 posterior than the section, d. ej, in fig. 25. 



Fig. 28. Cross-section through the loop of the unpaired part of the vas 

 deferens, cutting the loop along the line indicated in fig. 15. a, the wider, b, the 

 narrower arm of the loop (from same series of sections as fig. 25). sper, 

 spermatophor contained in the vas deferens. 



Fig. 29. Cross-section through the terminal appendage of the posterior acces- 

 sory gland (from the same series of sections as fig. 25). 



Fig. 30. Cross-section through the efferent duct of the posterior accessory 

 gland (from same series of^sections as fig. 25). 



Fig. 31. Another cross-section through the same duct, but more highly mag- 

 nified to show the peculiar lumen ; m, muscular layer. 



