REPORT ON THE CRINOIDEA. 195 



First radials almost or entirely invisible ; the second rather sharply convex, and 

 rising to a median tubercle at their junction with the wide axillaries. A similar but 

 smaller tubercle at the junction of the first two brachials. In large specimens these four 

 joints are sometimes slightly wall-sided, with straight edges and the margins of the dorsal 

 surface flattened. 



Ten arms, reaching nearly three hundred joints ; the third and next following 

 brachials smooth, rounded and nearly oblong, with a tendency to alternating tubercular 

 elevations at their junctions. After the second syzygy the joints are shortly triangular 

 and slightly overlapping, gradually becoming nearly oblong, but always much wider than 

 long. Syzygies in the third and eighth or ninth brachials, and often also in the twelfth 

 or thirteenth ; others at intervals of three to nineteen joints, usually eight or ten, the 

 intervals being somewhat longer in the outer parts of the arms than in their first third. 



The first pair of pinnules are about 8 mm. long and consist of some eighteen 

 moderately stout joints, of which some of the middle ones are longer than wide. The 

 pinnules of the next five or six brachials (fourth to ninth) are somewhat longer and stiffer, 

 with much stouter joints, sometimes the second and sometimes the third pair being the 

 largest. The fourth pair are occasionally much smaller than the third, and the fifth pair 

 are always much so, after which the length of the joints increases and the later pinnules 

 become long and slender. 



Disk naked ; sacculi abundant. 



Colour in spirit, — dark reddish-brown, bleaching to white. 



Disk 10 or 12 mm.; spread 25 to 30 cm. 



Localities.— Station 203, October 31, 1S74 ; lat. 11° 6' N., long. 123° 9' E.; 20 

 fathoms ; mud. One specimen. 



Station 212, January 30, 1875 ; lat, 6° 54' N., long. 122° 18' K; 10 fathoms ; sand. 

 Two specimens. 



Other Localities. — Ceram (Valenciennes) ; North Borneo (Grube) ; H.M.S. " Alert," 

 1881, Port Molle (12 to 20 fathoms), Port Denison (3 to 4 fathoms), Prince of Wales 

 Channel (7 to 9 fathoms), Torres Strait (10 fathoms); Padan Bay in the Mergui 

 Archipelago (Dr. J. Anderson). 



History. — Under this name I have united the two species that were found by Miiller in 

 the Paris Museum with the MS. names " Comatula Milberti" and " Comatula Jacquinoti " 

 respectively, which had been given to them by Valenciennes. They are each based upon 

 single specimens which I was able to examine carefully in 1876, and again in 1880 ; and 

 the subsequent study of a considerable amount of material obtained by H.M.SS. 

 Challenger and " Alert," and also by Dr. J. Anderson, F.K.S., of the Calcutta Museum, 

 has convinced me that the two types are really identical. Muller hardly ever made any 

 comparison of his species with one another, but simply contented himself with descriptions, 



