9 8 



irri short or of moderate length, with less than 40 segments 



b' 1' and I' similar, and of equal length Liparometra 



b 1' and I' of unequal length 



c l 1' markedly longer, and more or less stouter, than 1' or 1', . . Lamprometra 

 r 1' markedly longer than 1'. which in turn is markedly longer 

 than P 

 d 1 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. II. Clark. 

 1. Pontiometra andersoni (P. H. Carpenter). 



LÜTKEN. Catalogue Museum Godeftroy, vol. 7, 1879, p. "'. {Antedon poly pus, nomen nudum). 

 ,. Proc. Zool. Soc. London, 1887, p. 140 {Antedon sp.). 



Proc. Zool. Soc. London, 1SS8, p. 387, footnote {Ante Jon andersoni, nomen nudum). 



P. H. Carpenter, Journ. Linn. Soc. (Zool.), vol. 21, 1889, p. 306, pi. 26, figs. 1—5; pi. 27, 



. bitedon andersoni). 

 HARTLAUB. Nova Acta der Ksl. Leop.-Carol. deutschen Akad. der Naturforsch., vol. 58, 1891, 



N 1. p. 78 {Antedon andersoni). 

 A. II. CLARK. Smithsonian Miscellaneous Collections (Quarterly Issue), vol. 52, 1908, part 2, 

 p. 212. 

 - Vidensk. Medd. fra den naturhist. Forening i Kobcnhavn, 1909, p. 165. 



Buil. du Mus. d'hist. nat, Paris, 191 1, N" 4, p. 252. 



Smithsonian Miscellaneous Collections, vol. 60, 1912. N° 10, p. 21. 



Proc. I'. S. National Museum, vol. 43, 1912, p. 397. 



The Crinoids <>f the Indian Ocean, 1912, p. 138. 



RGER. Abhandl. der Senck. naturforsch. Ges., vol. 35, 1913, Heft 1, p. 103. 



Stat. 310. 5 E. j^ Metres. 1 Ex. 



A medium sized specimen with 53 arms about 140 mm. long was secured at this station. 



Oxymetra A. II. Clark. 



Key to the Species >>( the Genus Oxymetra. 



a 1 Cirrns segments Ion-, tin- longest about tvvice as long as broad, the distal about 

 ..s long as broad: 50 (49) arms 150 mm. long; cirri 55 mm. to 70 mm. long 



with 69—7^ segments (Java Si tenuicirra 



egments shorter, the longest but littl-- longer than broad, the distal twice 

 id as Ion-, or even broader 



