176 ECHINODERMA OF THE TnDIAN MuSEUM, PART VH. 



everted, this becoming a median transverse ridge on the twelfth aiid following, 

 appearing as a minute spine in lateral view; the opposing spine is prominent, 

 median, and ereet. 



The ten arms, which resemble those of O. serii pinna, are s:5 mm. long. 



Pj is slender, flagellate distally, with twenty-one segments which become 

 squarish on the fifth, the remainder being slightly longer than broad : P, is half 

 as long again and proportionately stouter with from twenty-one to tweiity-three 

 segments of which the longest are only slightly longer than broad ; P., and tlie 

 following pinnules are shorter and more slender than P, ; P<, has fourteen or 

 fifteen segments ; the distal pinnules are long and slender, with from thirty-two 

 to thirty-six segments. 



Habitat. — New Caledonia; the type, which was collected by M. Vigue in 

 1875, is in the Paris Museum. 



Family TROPIOMETRIDiE. 



TropiomHridm (part) 1908. A. H. Clark, Proc. U. 8. Nat. Mns., vol. 36. p. -H. 



Genus TROPIOMETRA. 



Tropiometrn 1907. A. H. Clark, Smiths. Miscell. Coll. (Quarterly Issue), vol. 50, 

 part 3, p. 349 (Comatula carinata Lamarck, 1816). 



TROPIOMETRA AFRA. 



Antedon (i.fcr LttTKEN, MS. 



AntedoH. afra 1890. H.^rtlaub, Nachr. Ces. Cottingen, Mai 1890, p. 172.— 189 1. 



Nova Acta Acad. German., vol. 58, No. I, p. 86, pi. 5, fig. 50. 

 Antedon macrodisr,us 1895. Haea, Zool. Mag. Tokyo, vol. 7, p. 115. 

 Tropionietra afra 1907. A. H. Clark, Smiths. Miscell. Coll. (Quarterly Issue), 



vol. 50, part 3, p. 349. 



Habitat. — Bowen, Queensland, and north to southern Japan. 



Depth. — Littoral, and down to 50 fathoms. 



TROPIOMETRA (JARTNATA. 



lAlecto carinata 1815. Leach, Zool. Miscell., vol. 2, p. '>3. 



C<miatnl,a carinata 1816. Lamarck, Hist. nat. des animaux sans vertebres, vol. 

 2, p. 534. — 1869. VON Martens, in von der Decken, Reise in Ost-Africa, 

 vol. 3, p. 129. 



Comatula bicolor 1862. Dujardin and Hup6, Hist. nat. des zoophytes. l^Ichino- 

 dermes, p. 208 (nomen nudum). 



Actinometra Solaris 1869. von Marten.s, in von der Decken, Reise in Ost- 

 Africa, vol. 3, p. 129. 



Antedon carinata 188S. P. H. Cahpknter, "Challenger'" Reports, vol. 26, 

 Zoology, p. 199 (part) (but not pi. xxxiv). 



