A MONOGRAPH OF THE EXISTING CRINOIDS 313 



stalked crinoids of the Siboga-Exped., 1918, p. 78 (in key; range). — Gislen, Kungl. Fysiogr. 

 Siillsk. Handl., new ser., vol. 45, No. 11, 1934, pp. 22, 48.— A. H. Clark, John Murray Exped. 

 1933-34, Sci. Reports, vol. 4, No. 4, 1936, p. 100 (range), p. 104. 



Diagnostic features. — The brachials are distinctly wedge-shaped, with the ends 

 never quite parallel, and are not exceedingly short. The enlarged lower pinnules are 

 smooth, with the earlier segments keeled. The cirri are 30 mm. long, with 39-43 

 subequal segments, all of which are about half again as broad as long and of which 

 those in the outer half bear short dorsal spines. The 20 arms are 80 mm. long. P 2 

 is the longest pinnule, half again as long as Pi or P 3) and is slender, with 21 segments. 



Description.— The cirri are XXII, 39-43, 30 mm. long. The segments are all 

 subequal, about half again as broad as long. Those in the outer half of the cirri bear 

 short dorsal spines. The cirri as a whole are comparatively long and moderately 

 stout. 



Ten IIBr series of 4(34-4) are present. The arm divisions and the arm structure 

 are as in H. reynaudi. 



The 20 arms are 80 mm. long. 



P 2 is the longest pinnule, half again as long as Pj or P 3 , slender, with 21 segments, 

 which become about as long as broad on the fourth or fifth, then somewhat longer 

 than broad, and elongate terminally. P 3 is about as long as Pj. P 4 and the following 

 pinnules are shorter than P 3 . The lower segments of the proximal pinnules are 

 moderately carinate. 



Remarks. — When compared directly with Muller's type specimen of H. reynaudi 

 this species is seen to differ in its longer and somewhat more slender cirri, which are 

 composed of slightly longer segments. 



Locality.— Zanzibar; M. Rousseau, 1841 [A. H. Clark, 1911, 1912, 1918] (1, P. M.). 



History. — The type specimen of this species was examined by Dr. P. H. Car- 

 penter during a visit to the Paris Museum, and he placed a label with it indicating 

 that it represented a new species. He did not, however, mention it in any of his 

 publications. It was first described in 1911 in a memoir on the crinoids of the coasts 

 of Africa and also in a report on the recent crinoids in the Paris Museum. 



HETEBOMETBA FHILIBERTI (J. Miiller) 



Plate 28, Figures 118, 119; Plate 30, Figures 124-126 



[See also vol. 1, pt. 1, fig. 258 (centrodorsal) , p. 255; fig. 335 (cirrus), p. 283; fig. 473 (centrodorsal), 

 p. 361; pt. 2, figs. 34-36 (radial pentagon), p. 20; figs. 447, 448 (pinnule tip), p. 261.] 



Comatula philiberti J. Muller, Abh. Preuss. Akad. Wiss., 1847 (1849), p. 259 (description; Java). — 

 Dujardin and Hupe, Histoire naturelle des zoophytes, Echinodermes, 1862, p. 205 (synonymy; 

 description; Java). — A. H. Clark, Bull. Mus. Hist. Nat., Paris, 1911, No. 4, p. 245 (identity) ; 

 Crinoids of the Indian Ocean, 1912, p. 30 (same). 



Antedon philiberti P. H. Carpenter, Trans. Linn. Soc. (Zool.), ser. 2, vol. 2, 1879, p. 29 (listed as 

 an Antedon). — Bell, Proc. Zool. Soc. London, 1882, p. 533 (listed). — P. H. Carpenter, Journ. 

 Linn. Soc. (Zool.), vol. 16, 1882, p. 513 (compared with Antedon bipartipinna [Craspedometra 

 acuticirra]) ; Proc. Zool. Soc. London, 1882 (1883), pp. 743 ff. (discussion of Bell's method of 

 formulation and corrected formula) ; Challenger Reports, Zoology, vol. 26, pt. 60, 1888, pp. 55, 

 253, 366, 3S0 (discussion). — Hartlatjb, Nova Acta Acad. German., vol. 58, No. 1, 1891. p. 19 

 (in key). — Minckert, Archiv fur Naturg., Jahrg. 71, 1905, vol. 1, Heft 1, p. 228 (regenera- 

 20S244 — JO 21 



