352 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Antedon propinqua A. H. Clark, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 132 (color), p. 133 (descrip- 

 tion; Albatross station 4895). 



Calometra propinqua A. H. Clark, Smithsonian Misc. CoU., vol. 50, pt. 3, 1907, p. 363 (listed). 



Calometra versicolor A. H. Clark, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 363 (listed); Proc. 

 U. S. Nat. Mus., vol. 34, 1908, p. 318 (Japan; considered as including propinqua) . 



Pedinometra versicolor A. H. Clark, Crinoids of the Indian Ocean, 1912, p. 180 (editorial error). 



Gephyrometra propinqua A. H. Clark, Crinoids of the Indian Ocean, 1912, p. 184 (locality); Journ. 

 Washington Acad. Sci., vol. 5, No. 6, 1915, p. 214 (range and its significance). 



Gephyrometra versicolor A. H. Clark, Crinoids of the Indian Ocean, 1912, p. 184 (synonymy; local- 

 ity); Journ. Washington Acad. Sci., vol. 5, No. 6, 1915, p. 214 (range and its significance). — • 

 GisL^N, Kungl. Fysiogr. Sallsk. Lund Forh., vol. 7, No. 1, 1936, p. 5 (French Indo-China), 

 p. 6 (range), p. 17 (locahty; notes). 



Description. — The centrodorsal is discoidal with the bare polar area flat. The 

 cirrus sockets are arranged in two crowded rows, with about 3 immediately beneath 

 each radial. 



The cirri are XX-XXV, 45, 25 mm. long. The first segment is about twice as 

 broad as long, or rather less, and the following gradually increase in length to the 

 fifth which is about as long as broad ; the following segments are slightly longer than 

 broad those succeeding gradually decreasing in length so that the twentieth is about 

 as long as broad and the remainder are not so long as broad, the terminal being about 

 twice as broad as long. In the proximal half of the cirri the ends of the segments 

 project somewhat, this feature gradually becoming less pronounced ventrally and 

 more pronounced dorsally so that the segments in the distal half bear prominent 

 dorsal spines. The opposing spine is in height equal to rather less than half the width 

 of the squarish penultimate segment; it is triangular, and arises from the entire dorsal 

 surface of the segment. The terminal claw is rather weak, not so long as the penulti- 

 mate segment, and moderately curved. 



The radials are visible as low interradial triangles; the apices of these triangles 

 are sometimes produced in a narrow band. 



The IBri are oblong, short, between 3 and 4 times as broad as long, in apposition 

 laterally though sometimes with the distal corners free, always meeting above the 

 radials. The IBra (axUlaries) are broadly pentagonal, about twice as broad as long, 

 sometimes with a thin lateral border, but always widely free. The IIBr series 

 resemble the IBr series, but are relatively somewhat longer; the IIBri are interiorly 

 united. 



The 20 arms are from 70 mm. to 90 mm. in length. The first brachials are 

 wedge-shaped, about half again as long exteriorly as interiorly, united interiorly. 

 The second brachials are similar, but exteriorly swollen and convex. The first syzygial 

 pair (composed of brachials 3 + 4) is about as long as broad, with the inner side of the 

 epizygal somewhat swollen. The next one or two brachials are oblong, not quite so 

 long as broad, the following becoming wedge-shaped and soon more obliquely so, 

 about as long as broad, with the longer side always rather strongly convex. Distally 

 the brachials become gradually less obliquely wedge-shaped, but do not become elon- 

 gate or oblong. The terminal brachials are very short and are much exceeded in length 

 by the terminal pinnules. 



Syzygies occur between brachials 3+4, and again about brachials 19+20, thence 

 distally at intervals of from 2 to 4 (usually 3 or 4) muscular articulations. 



P, is 7 mm. long, slender, delicate and flexible, composed of 20-30 segments of 



