108 Prof. MTntcsh's Notes from the 



which is bilobed. The first region of the body consists of 

 three bristled segments, the bristles of which are visible in 

 lateral view. It seems to be rather less than the cephalic 

 and buccal region in antero-posterior diameter, the bristles 

 follow each other closely in dorso-ventral views, and are 

 minute simple tapering forms with scarcely visible and 

 thinly distributed spikes on their tips. As in the other 

 members of the family no hooks occur in the anterior 

 division, which is marked by a slightly constricted region 

 having an antero-posterior diameter equal to the distance 

 between two of the anterior pairs of bristles. A slight ven- 

 tral swelling behind this indicates the tori of the next 

 segment, which is rather longer than both the regions above 

 mentioned. A tuft of bristles is situated on each side 

 dorsally, and they have the same structure as those already 

 mentioned. Considerable hypodermic glandular tissue 

 appears on each side in the line of the bristles and runs 

 backward to the end of the segment, indicating that in all 

 probability a similar, though perhaps less developed, arrange- 

 ment occurs in this as in the larger allies. Lateral and 

 ventral elevations mark the commencement of the next 

 segment, which is nearly double the length of the former. 

 Traces of glandular bands appear on the dorsum of this seg- 

 ment also, and a bristle-tuft at each side of the dorsum in 

 front ; the following two segments (3i'd and 4th of the 

 second region) are nearly equal in length, each having its 

 tori and bristle-tufts in front. 



The number of segments intervening between the fore- 

 going and the tail is uncertain. 



The body becomes a little more flattened towards the 

 tail, the segments gradually diminish in length, as also do the 

 tori, whilst the bristles, though fewer, considerably increase in 

 length. The last pair of bristle-bundles is accompanied by only 

 a few hooks. In a reproduced tail the end is bilobed, the 

 anus being in the centre. Moreover, behind the last bristle- 

 bundle are a few hooks, which show that these organs appear 

 before the bristles. A single bristle occurred in the last 

 bristled segment on one side and three on the other, the 

 4th bristles from the end are very long, and so with those on 

 several segments in front of it. 



The crochets are exceedingly minute, but apparently have 

 a similar structure to those already described, viz., a well- 

 marked double hook at the tip, the posterior curve of the 

 hook projecting beyond the neck, whilst the latter imme- 

 diately below the hook in front is carried well forward. 

 The neck is short and the shoulder slight, the shaft there- 



