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ABBREVIATIONS USED IN THE PLATES. 



ac.gl. % accessory glands of the spermiducal apparatus. 



at.gl., atrial glands. 



air., atrium. 



br., brain. 



c.m., circular muscles surrounding the ducts of the atrial glands. 



cr.m., circular muscles. 



ckyl., chylus cells in the intestine. 



cutic., cuticle. 



d.at.gl., ducts of the atrial glands. 



d.v., dorsal vessel. 



div ., diverticle of spermatheca or intestine. 



ducts, ducts of atrial glands. 



ep., epithelial cells. 



epith., epithelium. 



gig., ganglion. 



gin., ganglion inclosed in septal glands. 



gl.c.) glandular cells. 



ducts of atrial glands. 

 l.i intra-penial glands. 

 /., intestine. 



l.cA.j lower chamber or penial chamber of the sperm-duct. 

 *., muscles. 

 p.blb., penial bulb. 

 P-gl-t penial glands. 

 P-P a P-i penial papillae in Enchytrceus. 

 p.ck.) penial chamber in the lower part of the sperm-duct. 

 p.pore, penial pore. 

 5., septum. 

 sp.d., sperm-duct. 

 spth,, spermatheca. 

 spth.p., spermathecal pore. 

 5/.5 M sperm-sacs at the ends of the testes. 

 sep.gl.j septal glands. 

 /., testes. 



Note. The finer details of all the preparations were studied with Zeiss Apo. 

 3 mm., Apt. 1 : 40. Ocs. 8 and 12. Sections cut in paraffin and mounted in 

 Thus. Xvlol. Staining with eosin in alcohol and mcthylen blue 'o' or with 

 thionin. 



