256 
b" lo — 12 cirrus segments 
c' cirrus segments shorter, the longest (third and fourth) between three 
and four times as long as broad; antepenultimate about twice as long 
as broad; penultimate about half again as long as broad; cirri about 
XXX, lo — 12, 9 mm. long; arms about 30 mm. long; Pj 6 mm. long 
with 15 segments, of which the second and third are about as long- 
as broad, very slender; P„ very slightly shorter, with the first segment 
short, the second about as long as broad, the third half again as long 
as broad, and the following elongated; P„ bears a gonad (Saga mi 
Bay, Japan; 216 — 477 Metres) parva 
c'- cirrus segments longer, the longest (fourth and fifth) nearly or quite 
six times as long as the proximal breadth; segment preceding the ante- 
penultimate three times as long as broad ; antepenultimate twice as 
long as broad; penultimate half again to twice as long as the distal 
diameter; cirri XXX, 10, 6 mm. long; P^ somewhat longer and stouter 
than Pj (southwest of Iceland; 2043 Metres) . . . , '. . septenirionalis 
1. Thaumatomctra tenitis (A. H. Clark). 
VON Graff. "Challenger" Reports. Myzostoma, 1884, p. 79 (i Antedon sp.; Vladivostock). 
A. H. Clark. Proc. U.S. National Museum, vol. 33, 1907, p. 80 [Antcdoii tenuis); p. 81 
{Antedon ciliata). 
Vidensk. Medd. fra den natuihist. Forening i Kpbenhavn, 1909, p. 191 [Thaumato- 
inelra tenitis). 
2. Thattinatometra adyssorit-iu (P. H. Carpenter). 
P. H. Carpenter. "Challenger" Reports. Comatulae, 188S, p. 190, pi. 29, figs. 10 — 13 [Antedon 
abyssormn). 
3. Thazimatometra comaster A. H. Clark. 
A. H. Clark. Proc. U. S. National Museum, vol. 34, igoS, p. 232 [Tliauuiatouictra comaster). 
4. Thaumatometra cypris A. H. Clark. 
P. H. Carpenter. "Challenger" Reports. Comatulae, 1888, p. 179 (part), pi. 12, figs. 5, 7, 8,9 
[Antedon alternata). 
A. H. Clark. Smithsonian Miscellaneous Collections, vol. 61, 191 3, N'^ 15, p. 65 [Thaumato- 
metra cypris). 
5. Thattmatomefra altemiata (P. H. Carpenter). 
P. H. Carpenter. Quart. Journ. Micros. Sci., vol. 27, 1887, p. 386 [Antedon tenuis; nomen 
nudum). 
VON Graff. "Challenger" Reports. Myzostoma, 1887, p. 6 [Antedon alternata; nomen nudum). 
P. II. Carpenter. "Challenger" Reports. Comatulae, 1888, p. 179 (part), pi. 18, figs. 1—3 
[Antedon alternata). 
A. H. Clark. Smithsonian Miscellaneous Collections, vol. 61, 1913, N" 15, p. 6^ [Tkauinato- 
tnetra alternata). 
