- 98 
a- Cirri short or of moderate length, with less than 40 segments 
b' P„ and P^ similar, and of equal length Liparometra 
b- Po and P.. of unequal length 
c^ P„ markedly longer, and more or less stouter, than P3 or P, . . Lamprometra 
c" P., markedly longer than P^, which in turn is markedly longer 
than Pj 
d' lateral portions of the dorsal surface of the division series 
smooth ; division series never carinate, and never with a 
narrow dark median line; disk naked Dichrometra 
d' lateral portions of the dorsal surface of the division series with 
a prominent granular, tubercular or spinous ornamentation; a 
faint median carination or a narrow dark median line on the 
division series and arm bases, both often occurring together; 
disk covered, usually completely, with calcareous plates . . Mariametra 
Pontiometra A. H. Clark. 
I. Pontiometra andersoni (P. H. Carpenter). 
LiJTKEN. Catalogue Museum Godeffroy, vol. 7, 1879, p. ? [Antedon polypus, nomen nudum). 
Bell. Proc. ZoOl. Soc. London, 1887, p. 140 [Antedon sp.). 
Proc. Zool. Soc. London, 1888, p. 387, footnote [Antedon andersoni, nomen nudum). 
P. H. CARPENTER, Journ. Linn. Soc. (Zool.), vol. 21, 1889, p. 306, pi. 26, figs, i — 5; pi. 27, 
fig. 8 [Antedon andersoni). 
Hartlaub. Nova Acta der Ksl. Leop.-Carol. deutschen Akad. der Naturforsch., vol. 58, 1891, 
N" I, p. 78 [Antedon andersoni). 
A. H. Cl.-VRK. Smithsonian Miscellaneous Collections (Quarterly Issue), vol. 52, 1908, part 2, 
p. 212. 
Vidensk. Medd. fra den naturhist. Forening i Kobenhavn, 1909, p. 165. 
Bull, du Mus. d'hist. pat., Paris, 191 1, N" 4, p. 252. 
Smithsonian Miscellaneous Collections, vol. 60, 191 2, N" 10, p. 21. 
Proc. U. S. National Museum, vol. 43, 19 12, p. 397. 
The Crinoids of the Indian Ocean, 1912, p. 138. 
ReichenspergER. Abhandl. der Senck. naturforsch. Ges., vol. 35, 191 3, Heft i, p. 103. 
Stat. 310. 8°3o'S., ii9°7'.5E. Ji Metres, i E.x. 
A medium sized specimen with 53 arms about 140 mm. long was secured at this station. 
Oxymetra A. H. Clark. 
Key to the Species of the Genus O.xymetra. 
a^ Cirrus segments long, the longest about twice as long as broad, the distal about 
as long as broad; 50 (49) arms 150 mm. long; cirri 55 mm. to 70 mm. long 
with 69 — 78 segments (Java Sea) tefttiicirra 
a~ Cirrus segments shorter, the longest but little longer than broad, the distal twice 
as broad as long, or even broader 
