ZooL.-VoL. II.] EISEN-OLIGOCR.^TA. 1 55 



Detailed Description. 



Somites. — The somites anterior to the clitellum are of 

 about the same width. 



SetcB. — Only those setae anterior to the male pores con- 

 verge towards these pores. The setae are distant as fol- 

 lows : — Interval a-a^b-c, but is slightly narrower than 

 c-d; a-b is about two-thirds that of a-a. Setae c and d are 

 slightly dorsal. The penial set^ are not unusually long. 

 They are of medium size; the apex is almost straight, 

 ornamented with about twelve rows of faint, short, trans- 

 verse, wavey depressions or lines, of which there are about 

 three abreast, running somewhat diagonally in the direction 

 of the short diameter. 



Intestine. — The gizzard is rather imperfectly developed 

 and very small. It is hardly wider than the balance of the 

 intestine, is principally developed inwardly and does not 

 cause the intestine to bulge out. It is entirely confined to 

 somite V. The somites following are strongly nipped by 

 the septa. The sacculated intestine, commencing in XVII, 

 possesses very thin walls. No large chloragogen cells are 

 found on any of the divisions of the intestine. 



The sej)ta are all very narrow and those slightly thickened 

 are not more than twice as thick as the others. All the 

 anterior septa are attached half-way between the grooves. 



Glands. — The suprapharyngeal glands are well developed 

 and show a succession of lobes increasing in size posteriorly. 

 The septal glands are very minute and are found in somites 

 V, VI, VII, VIII and IX; in the latter somite they are 

 entirely ventral and exceedingly small, as seen in longitud- 

 inal sections of the body. 



Sexual Organs. — The testes are found in somites X and 

 XI, the spermiducal funnels in the same somite, while the 

 sperm-sacs are in XI and XII. The latter are small, strongly 

 racemose and entirely confined to the ventral part of the 

 body, not rising above the intestine. The ovaries are as 

 usual in XIII. They are strongly fringed, the individual 

 strands not being more than one ovum thick. 



