172 W. MILNE ON THE 



then across to the oral entrance. The upper part of the ring 

 comes down to near the bend of the secondary wreath and con- 

 tinues close, past and above it. When a slightly more ventral 

 view is had, the two can be seen alongside each other for a short 

 distance, but the continuation of eacK curve in its own direction 

 gradually separates.'Xhem. i. 



The ventral view (fig. 19b) shows the real relative positions of 

 the lines well. The ring rises from the hollow below the shallow 

 sulcus, and can be followed round to the apparent gap, as can 

 also the base on which the secondary wreath is situated. The 

 two seem to approach each other towards the gap. 



When the head is hanging down, well below the horizontal, 

 the three planes — top of corona, ring and secondary wreath — can 

 be seen projecting, one behind the other. 



The upper lip is like no other I know. It shows like a clear 

 transparent semicircle, with a metallic sheen, set on or rising 

 from a flat curve from the collar. A stout peg-like ligule rises 

 from the top and is always present. The rostrum has its segments 

 marked very clearly, and the double lamella is very transparent 

 and sometimes not very well seen, though quite large. There are 

 several long setae and one or two thicker ones with bulbous roots. 

 When tossed back the rostrum stands up perpendicular to the 

 segment as a great mass and covers nearly all the segment ; 

 the cilia are generally in motion. 



The dental bulb is long and narrow, and carries three larger 

 teeth and three, possibly four, very small ones. The first joint 

 in the neck posterior to the oral entrance is scalloped or serrated 

 roundly, ventrally ; and the anterior of the second trunk segment 

 has a similar appearance. 



The pellets are occasionally seen fairly large, but generally 

 quite small, and at times can hardly be distinguished in a thick 

 glairy mass. The foot is very short ; the first segment is heavily 

 granulate, the second is scarcely noticeable, so short is it. The 

 spurs are slightly divergent short cones, but in one or two large 

 examples the inner borders showed a slight double curve. There 

 are heavy glands right up through the foot. 



When settled and about to feed, it has a very peculiar quick, 

 panting sort of action, with a queer little throw-up of the head, the 

 jaws working all the time. It may keep this up for some seconds 

 before unfurling the corona. 



