ZooL.— Vol. II.] RISEN— OLIGOCH^TA. 245 



those following. The anterior fascicles have more setae 

 than the posterior ones, somite II having about 14 set^ in 

 the lateral fascicles and from 10 to 12 in the ventral ones. 

 This number gradually diminishes posteriorly, until in somite 

 IX there are about eight setae in the lateral fascicles and six 

 in the ventral. In somite XI and following the setse are 

 considerably smaller. The setae are more sigmoid and 

 more thickened in the middle than those in the former 

 species. 



Pores. — The male pores are situated in somite XI, imme- 

 diately lateral and dorsal to the ventral fascicles of setae, and 

 in such close proximity that the setae just clear the male 

 pore, the pores and the fascicles thus being in the equator- 

 ial of the somite. The spermathecal pores are situated 

 half-way between the anterior margin of the somite and the 

 equatorial line between the ventral and lateral fascicles of 

 set£e. The pores of the nephridia are in line with the ven- 

 tral fascicles of setae and near to the anterior margin of the 

 somite. 



Intestine. — There is a strong muscular pharynx but it 

 does not carry any suprapharyngeal gland. There is, how- 

 ever, a row of septal-pharyngeal glands opening into the 

 pharynx. These glands extend posteriorly to and include 

 somite VII. The most anterior gland is in IV, attached to 

 the anterior face of the septum III/IV. These glands are 

 principally developed ventrally and laterally, that in VII 

 ventrally only. The individual cells in these glands are 

 much separated, similar to those in EnchytrcBidcB. The 

 tubular intestine is narrow, nipped by the septa, and extends 

 to somite XI. In XII it enlarges into a sacculated intestine, 

 which is generally very large in XII, XIII and XIV, gradu- 

 ally narrowing down. The tubular intestine and the saccu- 

 lated intestine from somite XIV, posteriorly, are covered 

 with small chloragogen cells which are lacking in XII and 

 XIII. 



Blood-vessels. — The perivisceral vessels in the anterior 

 somites gradually increase in size posteriorly, but the pairs 

 in X and XI are considerably larger, serving as heart-^- 



