ENCHYTR^ID^ 5 



also ill Anachcetincc the cells of the penial papillae never enter the 

 sperm-ducts. 



Penial chamber. — The lowest enlargement of the sperm-duct situ- 

 ated below the enlargement designated as atrium. So far as known 

 no glands open into the penial chamber. 



Peptonepkridia. — Glands resembling nephridial structures, open- 

 ing into the pharynx. The name ' peptonephridia ' was first introduced 

 by Benham and later adopted by Michaelsen and others for structures 

 formerly designated as salivary glands. As these structures greatly 

 resemble the nephridial ducts, and differ characteristically from such 

 glandular structures as the segmental and sexual glands, a distinct 

 name for them is appropriate. 



Salivary gla7tds. — See peptonephridia. 



Sexual pap nice. — Glandular papillaj projecting exteriorly from 

 the body-wall, in the vicinity of the penial pore. The interior 

 glandular structures are designated 'penial bulb' or 'penial papillae,' 

 the latter in Enc/iytrceus., the former in Mesenchytrceus and other 

 genera. 



Sper??iiducal apparatus. — The sperm-funnels, sperm-duct, penial 

 bulb and accessor}', atrial and penial glands. 



Spermatheca. — Sperm-pockets (Samentaschen) . The pore gener- 

 ally in "I. The lower narrow part is the duct, the upper thin-walled 

 part is the ampulla, which is often furnished with diverticles at its base. 



Septal gla7ids. — Unicellular glands, grouped in fascicles, opening 

 in the palate, but often projecting several somites backwards. Septal 

 glands may be both dorsal and ventral. 



Sperm-sacs. — Sacs covered with integument and attached to the 

 testes. In these sacs the spermatozoa reach their final development. 

 The sperm-sacs are either single, paired, or a separate sperm-sac — 

 testicle-sac — may cap each separate lobe of the plurilobed testes, as in 

 the genus Lu7nbricillus . 



Ventral glands . — Peculiar coelomic glands of unknown quality, 

 but probably of sexual nature, found in the vicinity of the ventral 

 ganglion in certain genera. In some instances these glands are inti- 

 mately connected with the ventral nerve trunk, in other instances they 

 are merely in exterior contact with the ventral nerve trunk. They 

 always penetrate the body-wall and open through it immediately under 

 the ventral nerve trunk. The inner, or distal, ends are free in the cceIo- 

 mic cavity, or may be united with the ventral nerve trunk. (' Kopu- 

 lationsdriisen ' of Ude and Michaelsen ; ' Copulatory glands ' and 

 ' Outgrowths of nerve cords' of Beddard.) 



