736 Transactions of the Society. 



As the worm was immature, there are no observations to record 

 respecting the nature or position of the clitellum, or the shape of 

 the sperm-ducts and funnels. The spermathecae also were un- 

 developed. This is greatly to be regretted, as it would have been 

 possible, were these important organs matured, to form a better 

 opinion as to the possible relation with Fridericia parva and other 

 allied species. We may summarize the foregoing account as 

 follows : — 



Fridericia peruviana Friend. Length 5-6 mm., setae 2-5, 

 somewhat longer behind than before. Brain slightly concave pos- 

 teriorly. (Esophagus sharply marked off from intestine. Dorsal 

 vessel post-clitellian in origin, with dilatations in segments 7-9. 

 Three pairs of septal glands ; salivary glands not branched ; ne- 

 phridia lobed, chiefly postseptal. 



