96 



EISEN 



and the penial glands. Behind the papilla lies the penlal bulb, en- 

 closed and confined by the peritoneum. It is thus sharply defined 

 toward the coelom, into which it slightly projects. The center of the 

 bulb is occupied by the penial part of the sperm-duct, while on each 

 side of the latter there are two groups of penial glands opening respec- 

 tively by two pores, one in front of and one posterior to the sjDermi- 

 ducal pore proper. The glands which open in the lower part of the 

 sperm-duct inside the bulb are covered by thin strands of muscles, 

 thus giving the appearance of a bulb within a bulb. This arrange- 

 ment resembles that in JMescnchytrccus^ but is not found in any other 

 species of the subfamily of Lumbricillinae. But the arrangement of 

 the glands which open in the lower part of the sperm-duct is in other 

 respects similar to that found in the genera HeJilea and Fridericia^ 

 as well as in Marionina. In Alesenchytrceus only few species pos- 

 sess similar glands which open in the lower part of the sperm-duct, 

 while in LumbricilliuEe such glands are found in all the species exam- 

 ined by me. No atrium and no atrial glands. The sperm-duct vei'y 

 narrow and repeatedly convoluted, but owing to the fact that it is con- 

 fined to somite XII, it cannot be more than three or four times as long 

 as the sperm-funnel. The latter is longer than broad and points for- 

 ward, being confined to somite XI. This latter is full of spermatozoa 

 and the septum X/XI is pushed far forward against the intestinal 

 glands in VII. 



Testes solid and quite large. 



Spermathecce. — These organs appear to resemble those of B. eJilersi 

 described by Ude. The duct is long, narrow and even as to thick- 

 ness. It opens into a thin-walled sac which lies principally in VI. 

 The two sacs are grown together and continued as a narrow duct, 

 which at first runs parallel to the intestine and then penetrates it 

 somewhere in somite VII, probably in the posterior part of the somite 

 close to the septum VII/VIII. The spermathecge open exteriorly, as 

 usual, at the opposite ends of the transverse diameter of the body. 

 They are not accompanied by any glands. 



Septal glajids. — These offer no particular characteristics. They 

 are of large size and are partly attached to the septa and partly lie free 

 in the coelom. They open into the intestine just behind and on each 

 side of the pharynx (p1. xii, fig. i^gbi). 



Salivary glands. — In this species I find structures corresponding 

 to those described by Ude in B. eJilersi as strongly rudimentary sali- 

 vary glands. It seems to me more probable that these small compact 

 bodies are of a ganglionic nature and not glandular. There is no duct 



