45 
small and stellate, sunk well beU)\v the dorsal surface of the radials. The fourth specimen has 
2,"/ arms 65 mm. long, and V cirri. 
[•"rom .Slat. 60 (reef) there is a medium sized, but robust and well developed, individual 
with about 100 arms 110 mm, Iohl;; the centrodorsal is small and pentalobate. 
The specimen from Stat. y6 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 IIIHr 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 cohjur 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 llIBr series are 4 (3 + 4); the centrodorsal is very small and stellate; the colour is a 
uniform yellow brown. 
The specimen tVom Banda is typical, with about 100 arms which are about 120 mm. long. 
The e.xample 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 20 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 XYI, 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 IlIBr series are all 2, all the other division series being 
4 (3 + 4); the other is a slightly smaller individual; both have e.xceedingly 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 I II Br series. 
I 
3. Coinantheria rotula A. H. Clark. 
A. H. Clark. Proc. Biol. Soc. Washington, vol. 25, 19 12, p. 23. 
Smithsonian Miscellaneous Collections, vol. 61, 1913, N" 15, p- 14- 
Stat. 273. Anchorage oft" Pulu Jedan, eastern coast of the Am Islands (Pearl Hanks). 13 
Metres. 11 Ex. 
Stat. 282. 8°25'.2S., 127° 18.4 E. 27—54 Metres, i Ex. 
This form is intermediate between C. briar ens 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 IlBr 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 
characteristic of C. briareits is entirely absent. 
