82 
4- Heterometra affinis (Hartlaub). 
HartlaUB. Nova Acta der Ksl. Leop. -Carol. Deutschen Akad. der Naturforscher, vol. 58, 
1891, N" I, p. 25, pi. I, fig. 14; pi. 2, figs. 18, 24 (not 21 as given in the reference to 
the plate) [Antedon affinis). 
Stat. 99. 6°7'.5 N., 120° 26' E. (Anchorage off North Ubian). 16 — 23 Metres, i Ex. 
The specimen has fifteen arms about 70 mm. long; each IBr series bears on the right 
hand side (as viewed dorsally) a IIBr 4 (3 + 4) series; the two additional arms on the left 
anterior ray are as yet only 22 mm. in length, measuring from the a.xillary. The longest cirrus 
has 29 segments. 
This appears to be a young individual just completing the adolescent autotomy. 
Amphimetra A. H. Clark. 
Key to the Species of the Genus Amphimetra. 
a^ Cirri very stout, composed of very short subequal segments which are usually 
about four times as broad as long; the outer segments, which are relatively 
very slightly longer than the proximal, bear small sharp median spines 
b^ larger and stouter; cirri very large and stout, usually evenly curved 
throughout the entire length, never tapering distally, composed of 45 — 51 
segments of which the distal half or two thirds bear dorsal spines; arms 
from 150 mm. to 170 mm. long (P h i 1 i pp i n e I si a n ds) spectabilis 
\y smaller and more delicate ; cirri very stout basally, but usually tapering 
more or less distally, usually curved much more strongly in the distal 
than in the proximal half, composed of 34 — 37 segments of which nearly 
all bear dorsal spines; arms from 100 mm. to 115 mm. long (Maldives 
to the Sunda Islands, the Moluccas, the Philippines and 
Singapore) molleri 
a" Cirri more slender, more or less straight in the proximal half but strongly 
curved distally, composed of segments which are longer in the proximal portion 
than distally; the proximal segments are from twice as broad as long to as 
long as, or slightly longer than, broad 
b^ the basal segments of the pinnules in the proximal fourth of the arm are 
strongly carinate; P^ is the largest and longest pinnule, slightly larger and 
longer than Pg, and twice as long as the distal pinnules; cirri XII, 30 — 33; 
arms 150 mm. long (Philippine Islands; ? North Borneo) . . . parilis 
\i~ the basal segments of the earlier pinnules are not carinate ; the longest 
proximal pinnule is usually Pg, m6re rarely P,, which is very little, if any, 
longer than the distal pinnules 
c^ cirri stout, not tapering distally ; all of the cirrus segments are markedly 
broader than long 
