45 



small and stellate, sunk well below the dorsal surface of the radials. The fourth specimen has 

 37 arms 65 mm. long, and V cirri. 



From Stat. 60 (reef) there is a medium sized, but robust and well developed, individual 

 with about 100 arms 1 10 mm. long; the centrodorsal is small and pentalobate. 



The specimen from Stat. 96 has about 80 arms 105 mm. long; the centrodorsal is very 

 small and stellate. 



The example from Stat. 125 has about 80 arms about 100 mm. long; only seven of 

 the IIIBr series are 2; adolescent autotomy is in progress; the centrodorsal is irregularly 

 polygonal, though sunk below the level of the dorsal surface of the radials ; the colour is dark 

 brown, the radials darker, the centrodorsal nearly white. 



The specimen from Stat. 144 has between 90 and 100 arms about 90 mm. long; four 

 of the IIIBr series are 4 (3 + 4); the centrodorsal is very small and stellate; the colour is a 

 uniform yellovv brown. 



The specimen from Banda is typical, with about 100 arms which are about 120 mm. long. 



The example from Stat. 257 has about 50 arms which are about 90 mm. long. 



From Stat. 282 there is a typical specimen with about 100 arms, and a small specimen 

 with 26 arms about 70 mm. long undergoing adolescent autotomy; in the latter the arms on 

 the several rays are 2, 1 and 6, 3 and 5, 2, and 6 and i; the cirri are XVI, 12 — 13 (uSually 

 the latter) 8 mm. long. 



Of the examples from Stat. 299 one is a magnificent representative of the species with 

 about 80 arms 155 mm. long; the IIIBr series are all 2, all the other division series being 

 4 (3 + 4); tne other is a slightly smaller individual; both have exceedingly reduced stellate 

 centrodorsals. 



The deepness and strong dorsal convexity of the division series of this species, as well 

 as a certain ruggedness in their appearance, make it easily recognizable in spite of any 

 irregularity which may occur in the IIIBr series. 



3. Comantheria rotu/a A. H. Clark. 



A. H. CLARK. Proc. Biol. Soc. Washington, vol. 25, 1912, p. 23. 



Smithsonian Miscellaneous Collections, vol. 61, 1 91 3, N° 15, p. 14. 



Stat. 273. Anchorage off Pulu Jedan, eastern coast of the Aru Islands (Pearl Banks). 13 



Metres. 1 1 Ex. 

 Stat. 282. 8°25'.2S., i27°i8'.4E. 27—34 Metres. 1 Ex. 



This form is intermediate between C. briareus and C. weberi\ it exhibits the post-radial 

 structure of the latter, but possesses the centrodorsal and cirri of the former. 



The centrodorsal is greatly reduced, usually with a few weak cirri, though there may be none. 



The arms are 40 in number, from 100 mm. to 150 mm. long; the IIBr series are 4 

 (3 + 4), and the IIIBr series are 2 ; there is no further division. The dorsal surface of the 

 animal is smooth, with comparatively little overlap to the brachials, and the rugged appearance 

 charactéristic of C, briareus is entirely absent. 



