191 
parallel to that within the genus Antedon, the most noticeable 
characters in each being found in the shape and proportions of 
the cirrus joints. 
Mastigometra flagellifera (A. H. Clark). 
Alecto flagellifera Litken, M. S. 
epe irere føde 1908. A. H. Clark, Proc. Biol. Soc. Washing- 
ol. 
fe otemi= Rd m) 7 
Genus Thaumatometra A. H. Clark. 
Thaumatometra 1908. A. H. Clark, Proc. Biol. Soc. Washington, Vol. 
21, p. 127 . 
Thaumatometra tenuis (A. H. Clark). 
Aniedon tenuis 1907. A. H. Clark, Proc. U. S. Nat. eg Vol. 33, p. 80. 
Antedon ciliata 1907. A. H. Ciærk, tom; e1t.…, p 
Thaumatometra tenuis 1908. A. H. Clark, ven Se 35, p. 117. 
Coast of Korea: 38721" N.1at., 1289 393' BE. long: 
80 fathoms; Schånau, April 10, 1897. One specimen; 
this example is very large, with much enlarged genital glands, and 
agrees in every particular with the specimen I described as Antedon 
ciliata, which I later found to be the fully adult of my Å. tenuis; 
it also agrees with another specimen in the U. S. National museum 
purchased at Shanghai. 
LOSS" Nat, 19093 100 g. 140) fa fhom ss 
Suensson, 1882. Three rather small, though adult, specimens. 
41?30' N. lat., 129933' E. long.; 500—800 fathoms; 
Schonau, May 10, 1893. One fine large specimen, resem- 
bling the first. 
Thaumatometra isis (A. H. Clark). 
Antedon isis 1907. A. H. Clark, Proc. U. S. Nat. Mus., Vol. 338. p. 82. 
Thaumatometra isis 1908. A. H. Clark, Proc. Biol. Soc. Washington, 
Vol. 21, p. 128 
"Korea”; Suensson, December 1, 1893. One rather 
large Specimen. 
1) I have recently had the opportunity of examining specimens of a 
second species of this interesting genus which were brought from 
India; M. snegle Bermuedk doubtless comes from somewhere in 
the East Indian r 
