OE LITTLE-KNOWN C0MATITLJ3. 503 



bearing seventeen marginal cirri. These consist of 25-35 thick 

 joints, the first five or six of which are short and broad, and their 

 immediate successors about square. A faint dorsal spine appears 

 about the tenth joint and increases in size rather rapidly, the 

 joints also shortening somewhat. In the later joints the spine is 

 slightly smaller and projects forwards rather less strongly, but it 

 is larger on the penultimate than on any previous joint. 



Ten arms, the rays dividing only once, but remaining close to 

 one another. Three radials visible. The first are longer at the 

 sides than in the centre, and the second broadly hexagonal, partly 

 united laterally. Both tliey and the axillaries rise towards the 

 middle of their line of junction, which stands up as a prominent 

 tubercle. Axillaries almost triangular and but little longer than 

 the second radials. Krst bracliials widely pentagonal, partly 

 united by their inner ends, whicli are somewliat shorter than 

 the outer ones. Second brachials irregularly quadrate, their 

 inner ends projecting beyond the edges of the preceding joints. 

 The outer sides of both joints are somewhat flattened laterally, 

 and they rise steeply towards their line of junction just as the 

 two outer radials do. Third brachial short and oblong, a syzygy. 

 The next few joints also short, rounded and nearly oblong, with 

 slight backward projections alternately from the inner and outer 

 sides of their proximal edges. The following ones short and 

 sharply wedge-shaped ; at first considerably wider than long, but 

 narrowing rather quickly and also commencing to overlap, so that 

 the middle and later joints are almost saucer-shaped. 



Syzygia on the third and eighth brachials ; then an interval of 

 6-12, usually 9 or 10, joints between successive syzygia. 



None of the pinnules are specially distinguished. The first, on 

 the second brachial, is slender, consisting of about fifteen smooth 

 cylindrical joints. The next (on third brachial) is shorter and 

 more slender ; and the next about as long as the first, but stouter, 

 having thicker joints all very smooth. The basal joints of the 

 next two pairs are still rather tliick, after which they decrease in 

 size ; and the pinnules increase very slowly in length, never be- 

 coming specially long, and consisting of smooth cylindrical joints. 

 Disk about 6 mm. in diameter, almost concealed ; anal tube plated. 



Colour light brown, with purplish bands. Sacculi closely set 

 on the pinnule-ambulacra. Spread 15 centim. 



One specimen from Canton. 



Bemarks. — The tubercular character of the radials and the 



