46 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



by the Hamburg Southwest Australian Expedition, 1905, published in 1911, I listed 

 Cenometra cornuta from Adele Island and "northwestern Australia," and in my 

 memoir on the crinoids of the Indian Ocean published in 1912 I listed it from the same 

 localities. In my paper on the crinoids of the British Museum published in 1913 the 

 specimen from Adele Island was redescribed, and a specimen without locality was 

 recorded. This was the specimen from "northwestern Australia" mentioned in 

 1911 and 1912. 



CENOMETRA EMENDATRIX (Bell) 



PLATE 8, FIGURE 34 

 [See also vol. 1, pt. 2, fig. 278 (arm and pinnules), p. 213.] 



Antedon emendatrix BELL, Ann. Mag. Nat. Hist., ser. 6, vol. 9, 1892, p. 428 (description; Mauritius) ; 

 pi. 18. HAMANN, Bronns Klassen und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1581 

 (listed). A. H. CLARK, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 4 (history; unsatisfactory char- 

 acter of the original description; referred to Cenometra). 



Himerometra emendatrix A. H. CLAKK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 356 (listed). 



Antedon spicata BELL, Trans. Linn. Soc. (Zool.), ser. 2, vol. 13, pt. 1, 1909, p. 20 (Seychelles). 

 A. H. CLAKK, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 6 (identity); Smithsonian Misc. Coll., 

 vol. 61, No. 15, 1913, p. 87 (identity). 



Cenometra emendatrix A. H. CLARK, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 6 (= Antedon spicata 

 Bell, 1909), p. 8 (occurs in southeast Africa), p. 28 (synonymy, detailed description of a speci- 

 men from Mauritius in the Berlin Mus.; localities; descriptions of additional specimens); vol. 

 43, 1912, p. 385 (identity), p. 399 (Mauritius); Crinoids of the Indian Ocean, 1912, p. 41 

 (= Antedon spicata Bell, 1909), p. 156 (synonymy; localities); Smithsonian Misc. Coll., vol. 61, 

 No. 15, 1913, p. 33 (published references to specimens in the B. M.; localities; characters of the 

 specimens). HAHTMEYER, Mitt. Zool. Mus. Berlin, vol. 8, No. 2, 1916, p. 235 (Mauritius, No. 

 6375). GISLEN, Kungl. Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, pp. 20, 25. 

 A. H. CLARK, John Murray Exped. 1933-34, Sci. Reports, vol. 4, No. 4, 1936, p. 100 (range), 

 p. 104. GISLEN, Kungl. Svenska Vet.-Akad. Handl., ser. 3, vol. 18, No. 10, p. 13. 



Diagnostic features. The basal segments of all the proximal pinnules, including 

 Pa, are carinate; the carination of the basal segments of PZ is high and conspicuous, 

 with the crest strongly convex. There are 12-22 (averaging 16) arms which are 

 from 90 to 100 mm. long. The cirri are XIV-XX, 28-41 (averaging 34), from 15 to 

 20 mm. long. P 2 is about 9 mm. long with 15-21 segments. 



Description. The centrodorsal is low hemispherical or thick discoidal with the 

 sides strongly inclined, and is about 4 mm. in diameter. The dorsal pole is small and 

 very slightly concave. The cirrus sockets are arranged in two crowded and irregular 

 rows. 



The cirri are XVIII, 28-33 (usually nearer the latter), from 15 to 20 mm. long, 

 and comparatively slender. The first segment is short and those following gradually 

 increase in length to the fourth which, with those following, is about half again as 

 broad as long. The penultimate and antepenultimate segments are about as long as 

 broad. After the eighth the distal dorsal edge of the segments begins to project slightly, 

 this projection after the sixteenth becoming a pair of small, though prominent, dorsal 

 spines situated close together, one on either side of the median line. On the antepe- 

 nultimate segment only a single median small spine is found. In the terminal third 

 of the cirri the paired dorsal spines, which at first were near the distal dorsal edge of the 

 segments, have moved to a median position. The opposing spine is long and promi- 

 nent, reaching somewhat over half the width of the penultimate segment in height; 



