404 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



ossicles of the division series and the lower brachials are covered with fine dermal 

 granulations. 



Pi is 15 mm. long, composed of 42 segments, of which the comb occupies 19, 

 arising very gradually. The teeth of the comb are low, well separated, and well 

 rounded distally, in height not reaching the lateral diameter of the segments which 

 bear them. The second-fourth or -fifth segments of the pinnule have prominent 

 and coarsely spinous ends. P2 is 12 mm. long, similar to Pi but smaller and propor- 

 tionately less stout. P3 is 7 mm. long, very slender, proportionately smaller and 

 more slender than Pj. P4 is 6.5 mm. long, slightly stouter than P3, without a comb, 

 and becoming very slender distally. The distal pinnules are 12 mm. long with 23 

 segments which have prominent articulations. 



Localities —Siboga station 297; off Rotti, southwest of Timor (lat. 10° 39' 00" 

 S., long. 123° 40' 00" E.); 520 meters; soft gray mud with a brown superficial layer; 

 January 27, 1900 [A. H. Clark, 1912, 1918] (1, Amsterdam Mus.). PI. 45, figs. 

 138, 139. 



Siboga station 267; ofi' the southwesternmost of the Kei Islands (lat. 5° 54' 

 00" S., long. 132° 56' 42" E.); 984 meters; gray mud with a brown superficial layer; 

 December 20, 1899 [A. H. Clark, 1918] (1, U.S.N.M., E. 404). 



Remarks. — As yet this species is only known from the two specimens dredged at 

 widely separated stations by the Siboga. 



Subfamily Comasterinae A. H. Clark 



Comasterinae A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1908, p. 175 (includes Comaster 

 and Comanthus) ; Die Fauna Sudwest-Australiens, vol. 3, Lief. 13, 1911, p. 438 (4 genera and 9 

 species in Australia); Crinoids of the Indian Ocean, 1912, p. 6 (subfamily exclusively confined 

 to the East Indian region; number of genera and number of species); p. 20 (distribution in 

 detail); p. 54 (in key); Bull, de I'lns+itut oc^anographique, Monaco, No. 294, 1914, pp. 7, 8 

 (relations ta temperature); Journ. Washington Acad. Sci., vol. 4, No. 19, 1914, pp. 559-563 

 (correlation of geographical and bathymetrical ranges); No. 20, p. 582 (relation to tempera- 

 ture); Records of the Western Australian Museum, vol. 1, pt. 3, 1914, p. 114 (genus and 

 species collected by the Endeavour in Western Australia); Journ. Washington Acad. Sci., vol. 5, 

 No. 4, 1915, pp. 126-134 (bathymetrical range and its phylogenetic and palaeontological 

 significance) ; .4mer. Journal of Science, vol. 40, 1916, p. 67 (detailed discussion of bathymetrical 

 range); Smithsonian Miscell. Coll., vol. 66, No. 10, 1915, p. 16 and following (phylogenetical 

 study); Amer. Naturalist, vol. 49, 1915, p. 525 (bathymetrical and thermal ranges; component 

 genera and their bathymetrical ranges); p. 539 (genera with asymmetrical disks; genera with 

 one or more rays dwarfed); Unstalked Crinoids of the Siboga Exped., 1918, p. 1 (in key); 

 p. 2 (in key); p. 34 (key to the included genera); University of Iowa, Studies in Nat. Hist., 

 vol. 9, No. 5, 1921, p. 14 (not represented in West Indies); Smithsonian Miscell. Coll., vol. 72, 

 No. 7, 1921, p. 3. 



ComasUrinis A. H. Cl.\kk, Bull, du mus. d'hist. nat., Paris, No. 4, 1911, p. 247. 



Diagnosis. — A subfamily of Comasteridae in which the cirri usually, but not 

 always, bear dorsal spines or tubercles on the outer segments; the cirri may be well 

 developed, and even large and stout, but are frequently small and weak and only 

 partially and irregularly developed, or entirely absent; the arms are always more 

 than 10 in number; all, most, or at least some of the division series are 4 (3 + 4), 

 those not 4 (3 + 4), if such be present, being 2, or 2 (1+2); the first brachial syzygy 



