ANATOMICAL STRUCTURE OF KERRIA. 303 



The diverticulum is attached to the body-wall by a 

 very thick muscular band, much thicker than in species 

 of Ocnerodrilus and also much shorter. The muscular 

 band is forked after it reaches half way to the body-wall, 

 each fork being attached to the body-wall separately. 



The tubular iutcst{}ic offers no great peculiarities. It 

 is rather straight, much more so than any part of the 

 cesophagus, but is still noticeably contracted at the septa, 

 as in Kerria kolophihi. It is lined with ciliated cells as 

 in Ocnerodrilus. 



The sacculated intestine commences in somite xii where 

 it is about two times as wide as the tubular intestine. It 

 is more strongly furnished with blood sinuses and vessels 

 than the same region in Ocnerodrilus. 



Septal glands (figs, i and 2 5, gl-)- There are five 

 more or less paired septal glands surrounding CESophagus 

 in somites v, vi, vii andviii. In appearance and arrange- 

 ment they resemble the corresponding glands found in 

 Ocnerodrilus and Gordiodrilus. The gland in somite v 

 is the largest, the one in vi is smaller and the posterior 

 one in viii is the smallest, being hardly perceptible. The 

 difference in size is greater between the glands in vii 

 and vi, than between those in vi and v. The one in vii 

 is only about one-half the size of the one in vi. All the 

 glands are principally developed on the upper side of the 

 oesophagus, that part of them being much higher than 

 the one below oesophagus. All the glands are connected 

 by thick muscular bands with the body-wall of the somite 

 immediately behind in the same way as in Ocnerodrilus. 



Beddard does not inform us if there are septal glands 

 in Kerria halophila, but we presume this to be the case. 

 The absence of septal glands would, I think, be sufficient 

 to separate these forms into different genera, but at pre- 

 sent we must suppose that the septal glands in Beddard's 



