262 Transactions of the Society, 



Stress is laid by Beddard and others on the single dorsal 

 diverticulum of the oesophagus in Buchliolzia, whence arises the 

 dorsal vessel. This diverticulum has been the subject of careful 

 study on the part of Michaelsen, Yejdovsky, and others, and may 

 be readily perceived. In Chamxdrihis no such organ is anywhere 

 to be found, the dorsal vessel arising some distance behind the 

 girdle. 



In some respects, however, Chamdedrihis more closely resembles 

 the two aberrant species of Marionina than Buchliolzia. In 

 Marionina the oesophagus goes gradually into the intestine, but 

 the blood is yellow or red, and the testes are massive. Alike in 

 M. sphagnetorum and M. glandidosa, we find more than the usual 

 three pairs of septal glands, but in both these species the sperma- 

 thecse are free, and not attached to the intestine. The appearance 

 of Gharndddrihts much more closely resembles that of Enchytrmus 

 huchholzi than Marionina sphagnetorum or any other British 

 worm. Yet it is clearly marked off from the genus Enchytrseus by 

 a number of important characters. 



It remains for us to deal with one or two critical points in 

 connexion with the essential organs. In order, if possible, to 

 determine these with accuracy, I have re-examined the living 

 material, with the following results. In an immature specimen, 

 there appeared a pair of young organs like testes, attached to the 

 septum behind the third pair of septal glands. These gradually 

 develop till they have all the appearance of oesophageal glands 

 such as occur in several species of Henlea. The difference in 

 colour between this pair of glands and the septals is due to the 

 presence in the mature Annelid of spermatozoa, whence one infers 

 that they are the testes. The ovaries have not been observed, but 

 one constantly finds ova in every stage of development in the 

 ninth and tenth segments, together with masses of spermatozoa. 



From the foregoing we are able to deduce the following 

 characters : — 



Chamsedrilus chlorophilus. — Length 5-15 mm. Segments 

 ranging from 25-70. Set?e sigmoid, slender, never exceeding three 

 per bundle ; four sets in each segment. Brain narrowing ante- 

 riorly, incised behind, about 1^ times longer than the greatest 

 width. Four pairs of septal glands ; salivaries wanting. Dorsal 

 vessel postclitellian ; vascular system extremely delicate and 

 wanting in the usual commissures anteriorly. CEsophagus merging 

 gradually into intestine. Spermathecse attached to the intestine, 

 and opening in 4/5 with a large gland, without diverticula. 

 Testes in segment 7 between third and fourth pair of septal glands, 

 and having the appearance of cesophageal glands. Girdle usually 

 covering the ninth and half the tenth se^^ment ; cells more or less 

 distinct, pore invisible. Sperm-funnels 2, 3, or 4 times as long as 

 broad, attached to a long, slender duct. Nephridia beginning 



