ENCHYTR^EID^E 



8 7 



clarce these glands are in the form of a thin disk and confined to the 

 very base of the spermatheca, while in this species the glands extend 

 all the way up to the pouch. The species is also characterized by its 

 many ventral glands, these being present in three somites. 



DETAILED DESCRIPTION. 



Somites. There is a great variation in the number of somites, the 

 smallest adult worms possessing only 39, while the largest one had as 

 many as 58. As I did not possess a sufficient number of the smaller 

 size I must leave it to the future to ascertain whether perchance there 

 are other differences between the larger and the smaller specimens. 



FIGS. 56 AND 57. Lumbricillus franciscanus. 



Septal glands . These are thick and rounded, and the septal part is 

 about equal to the interseptal part. 



Dorsal vessel has already risen in XVI. How much further it ex- 

 tends posteriorly I do not know, as I did not section further. In that 

 somite it is large and covered with long chloragogen glands. Similar 

 glands also surround the intestine throughout its length. 



Spermathecce (fig. 56). Theampullais rounded, oval, or sometimes 

 a little pointed. The opening connecting with the intestine is not at 

 the apex but a little below it. The walls of the ampulla are thin. The 

 duct is straight, cylindrical, and of even thickness. It is covered along 

 its whole length with glands which are much longer at the base of the 

 spermatheca than at the junction with the ampulla. The duct and 

 ampulla are of about the same length. 



