328 Records of the Indian Museum. [Vol. X, 



and separated by a fairly wide angle ; there is a slight nodulus 

 one-third of the length of the shaft from its distal end. 



The ventral setae are usually 3, occasionally 4, and rarely 5 

 per bundle ; there is no sharp division into an anterior and a poste- 

 rior group. They are 30-40/11 long, approximately i'25m thick, of 

 the usual double-curved and double-pronged type, the nodulus 

 generally distal. 



Differences between different segments may be illustrated by 

 a few further details. In segment iv, as an example from the 

 anterior region, the length was 35/', the nodulus was distal in the 

 ratio : — distal portion of shaft r proximal portion : : 2:3; the 

 distal prong of the fork was slightly longer. In segment x the 

 prongs were equal in length, but the proximal prong was the 

 thicker at its base ; the nodulus here also was distal. 



In segments ii and iii the setae were shorter, 30M ; and the 

 nodulus at the middle of the shaft, or slightly or obviously proxi- 

 mal. In vi and viii setae were met with in which the nodulus 

 was at the middle or only slightly distal. 



Coelomic corpuscles are numerous. They appear black, i.e. 

 are opaque, under the low power ; by reflected light they cause the 

 white spots and bands previously mentioned. With the high 

 power they are seen to consist of aggregations of minute oil-like 

 refractile globules, the proper colour of which is apparently yellow- 

 ish. In shape they are circular or occasionally oval, and in size 

 from 6 to i /* in diameter; a fairly large one would be lOju.; in 

 stained specimens they are seen to be nucleated. The corpuscles 

 can move forwards as far as the tip of the prostomium ; in the 

 first few segments they travel about with no apparent hindrance. 



A second type of corpuscle was seen in fresh specimens, but 

 in smaller numbers ; these were of about the same size, but 

 hyaline ; no nucleus was observed in the living condition. 



The pharynx is bulky, and occupies segments ii and iii. The 

 oesophagus begins in segment iv. The septal glands are rather 

 variable ; they are apparently always present in segments iv and v, 

 with the addition usually of a smaller pair in segment iii, or in 

 segment vi, or (in one specimen) in both iii and vi. The stomach 

 is in viii, of a pyriform shape with the broad end directed 

 forwards ; it has a somewhat streaked appearance, due apparently 

 to the chloi agogen granules being arranged more or less in rows. 

 The alimentary tube is still narrow for some distance behind the 

 stomach, and in contracted specimens forms here a small loop 

 directed backwards ; this is not quite straightened out even when 

 the animal extends itself. The intestine begins in segment ix. 



I failed to discern any transverse vascular commissures. 



The first nephridiu?n is in segment ix ; the next is in xi, 

 and there are no more in the anterior animal of a chain of two ; 

 in the posterior animal a nephridium occurs opposite the second 

 pair of setal bundles, i e. as will appear immediately, in what 

 will be the ninth segment of this individual after separation. 



