A MONOGRAPH OF THE EXISTING CRINOIDS 379 



pronounced distally. P 3 is 15 mm. long, similar to P 2 though very slightly stouter. 

 P 4 is 14 mm. long. P 6 is 12 mm. long. P fl is 10 mm. long, similar to P 3 but with pro- 

 portionately somewhat longer segments which in the distal portion have more expanded 

 ends. P 6 has 15 segments. P 7 is 10 mm. long, slightly stouter than P 6 with about the 

 same number of segments which are proportionately rather shorter. P 8 is 9 mm. 

 long, stouter than P 7 , especially on the third, fourth, and fifth segments, none of which 

 are more than twice as long as broad. The pinnules following are of the same length 

 as P 8 and in general similar; the third-seventh segments are somewhat broadened, 

 the pinnules tapering evenly from a maximum width on the fourth to a slender tip 

 composed of much elongated segments which have expanded and spinous distal 

 ends. The distal pinnules are slender, 10 mm. long. 



Side- and covering-plates are highly developed. 



The disk is completely covered with a pavement of rather small rounded plates, 

 those in the mterradial areas between the division series bearing conical processes hi 

 their centers. This calcareous covering is not closely united to the underlying peri- 

 some except along the ambulacra, but draws away from it on diying. 



Localities. Investigator station 236a; northeast of North Andaman Island (lat. 

 1408' N., long. 9308' E.); 302 meters; April 11, 1898 [A. H. Clark, 1909, 1912] 

 (1, I. M.). 



Albatross station 5661; Flores Sea; off Salayer, south of western Celebes (lat. 

 549'40" S., long. 12024'30" E.); 329 meters; temperature 50.5 C.; hard bottom; 

 December 20, 1909 [A. H. Clark, 1918] (1, U.S.N.M., 35972). 



Siboga station 94; off Makassar, southwestern Celebes (lat. 511'12" N., long. 

 11935'24" E.); 450 meters; bottom apparently sand and stone; June 26, 1899 [A. H. 

 Clark, 1918] (1, Amsterdam Mus.). 



Geographical range. From the Andaman Islands to Celebes. 



Bathymctrical range. From 302 to 450 meters; the average of 3 records is 360 

 meters. 



Thermal range. One record, 50.5. 



Remarks. This species is known from three specimens, the first dredged by the 

 Investigator in 1898, the second dredged by the Siboga in 1899, and the third dredged 

 by the Albatross in 1909. 



PECTINOMETBA FLAVOPUBPUBEA (A. H. Clark) 



PLATE 39, FIGURES 199, 200 

 [See also vol. 1, pt. 2, fig. 241 (brachials), p. 197; fig. 734 (disk), p. 349.] 



Antedon discoidea (part) H. L. CLARK, in McClendon, Bull. Amer. Mus. Nat. Hist., vol. 23, 1906, 

 pp. 120, 125, 126 (Suruga Gulf and Sagatni Bay; myzostomes). BODLENGER, British Antarctic 

 ("Terra Nova") Exped., 1910, Nat. Hist. Rep., Zool., vol. 2, No. 6, Jan. 22, 1916, p. 136 (host 

 of Myzostomum cysticolum). 



Antedon flavopurpurea A. H. CLARK, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 131 (color), p. 134 

 (description; Albatross station 4935). 



Calometra flavopurpurea A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 363 (listed) ; 

 Proc. U. S. Nat. Mus., vol. 34, 1908, p. 313 (localities in Sagami Bay); Smithsonian Misc. Coll., 

 vol. 52, pt. 2, 1908, pp. 222, 223 (compared with C. carduuni). 



