824 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Atelecrinus cubensis P. H. CARPENTER, Bull. Mus. Comp. Zool., vol. 9, No. 4, 1881, p. 166 (off Cojima, 

 Cuba, 450 fms.; Antedon cubensis Pourtales, in part; characters) , p. 168 (comparison with A. bala- 

 noides); pi. 1, fig. 7; Journ. Linn. Soc. (Zool.), vol. 16, 1882, p. 491 (detailed description; 1 speci- 

 men, off Cojima, 450 fms.); Challenger Reports, Zoology, vol. 11, pt. 32, 1884, p. 379 (locality). 

 LOCKINGTON, Standard natural history, vol. 1, 1884, p. 144 (from Carpenter). P. H. CARPENTER, 

 Challenger Reports, Zoology, vol. 26, pt. 60, 1888, pp. 69-73 (comparisons with other species), 

 pp. 369, 374 (locality). A. H. CLARK, Proc. U.S. Nat. Mus., vol. 33, 1907, p. 155 (name not 

 tenable; pourtalesi proposed as a substitute). HAMANN, Bronn's Klassen und Ordnungen des 

 Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1575 (listed). HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 

 4, 1912, p. 281 (listed), p. 386 (history), p. 484 (comparison of type specimen with balanoides) , 

 pi. 14, figs. 3, 8, 9. 



Atelecrinus balanoides P. H. CARPENTER, Bull. Mus. Comp. Zool., vol. 9, No. 4, 1881, p. 166 (Blake 

 sta. 43, 339 fms.; Challenger, near Pernambuco, 350 fms.; Blake stas. 150, 151, 222, 260, 291-375 

 fms.; characters), p. 167 (basals and centrodorsal) , p. 168 (comparison with A. cubensis), pi. 

 1, figs. 1-6; Journ. Linn. Soc. (Zool.), vol. 16, 1882, p. 489 (detailed description; Challenger sta. 

 122; other localities as before); Challenger Reports, Zoology, vol. 11, pt. 32, 1884, pp. 376, 380. 

 LOCKINGTON, Standard natural history, vol. 1, 1884, p. 144 (from Carpenter). P. H. CARPEN- 

 TER, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, p. 70 (detailed description; Challenger 

 sta. 122), p. 374 (distribution), pi. 6, figs. 6, 7. WALTHER, Einleitung in die Geologie als his- 

 torische Wiss., 1894, p. 299 (after Carpenter). BATHER, in Lankester, A treatise on zoology, 

 vol. 3, Echinoderma, 1900, p. 196, fig. CXVIII. MINCKERT, Arch. Naturg., Jahrg. 71, vol. 1, 

 1905, Heft 1, p. 172 (syzygies; pinnulation). A. H. CLARK, Proc. U.S. Nat. Mus., vol. 33, 

 1907, p. 130 (comparison of proximal structure with that of Antedon [Neometra] multicolor), 

 p. 155 (history). HAMANN, Bronn's Klassen und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 

 1907, p. 1575 (listed). A. H. CLARK, Notes Leyden Mus., vol. 34, 1912, p. 151 (disk compared 

 with that of Atopocrinus sibogae). HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 4, 1912, 

 p. 281 (in Blake collection), p. 386 (history), pp. 481-485 (Blake stas. 43, 150, 151, 222, 260 

 [specimens examined from 150, 151, 260]; detailed account), p. 482, fig. 15, a-d, p. 483, fig. 

 16, a, b; pi. 14, figs. 1, 2, 4, 6, 7. A. H. CLARK, Fisheries, Ireland, Sci. Invest., pt. 4, 1913, p. 

 5 (compared with A. helgae); Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 68 (published 

 references to specimens in the B.M.; Challenger sta. 122); Unstalked crinoids of the Siboga- 

 Exped., 1918, p. 267 (in key; range; synonymy); The Danish 7nffo//-Exped., vol. 4, No. 5, Cri- 

 noidea, 1923, p. 44 (range). GISLEN, Ark. Zool., vol. 19, No. 32, 1928, p. 12 (brachial 

 articulation). H. L. CLARK, Mem. Soc. Cubana Hist. Nat., vol. 15, No. 1, 1941, p. 13 (Atlantis 

 sta. 2990), p. 14 (comparison with pourtalesi) . A. H. CLARK, Bull. U.S. Fish. Comm., vol. 

 55, 1954, p. 374 (listed). 



Atelecrinus, sp. P. H. CARPENTER, Bull. Mus. Comp. Zool., vol. 9, No. 4, 1881, p. 152 (Blake stas. 

 150, 151, 222). A. AGASSIZ, Bull. Mus. Comp. Zool., vol. 15 (reprinted as "Three Cruises of the 

 Blake," vol. 2), 1888, fig. 416, p. 124. 



Atelecrinus pourtalesi A. H. CLARK, Proc. U.S. Nat. Mus., vol. 33, 1907, p. 155 (new name for Atele- 

 crinus cubensis P. H. Carpenter, not Antedon cubensis Pourtales). HARTLAUB, Mem. Mus. 

 Comp. Zool., vol. 27, No. 4, 1912, p. 484 (history of the name). H. L. CLARK, Mem. Soc. Cubana 

 Hist. Nat., vol. 15, No. 1, 1941, p. 13 (Atlantis sta. 3341; distinct from balanoides). 



Diagnostic features. Since the 10 columns of cirrus sockets are not noticeably 

 marked off into radial pairs by interradial spaces and since the columns alternate in 

 level on the centrodorsal, the projections flanking the cirrus sockets of any two adjacent 

 columns tend to be crowded into a single, more or less zigzag, row; in shape the cen- 

 trodorsal has straight sides near the base and then tapers evenly to the fairly sharp 

 apex; it is distinctly higher than its basal diameter, and the interradial ridges on the 

 basal portion are usually high and sharp; finally the IBri have no approximating lateral 

 flanges. 



Description. The centrodorsal is conical but with the sides almost parallel near 

 the base, reaching 3.5 mm. in width at the base and 5 mm. in height, though usually 

 somewhat smaller. It bears 10 columns of cirrus sockets of from 4 to 6 each, 2 columns 



