232 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



p 55 (in key).— GiSLfi:*, Zool. Bidrag Uppsala, vol. 9, 1924, p. 11 (arm ending; abnormal P,), 

 p. 12 (abaorraal arm; hoxaraerous specimen), pp. 20, 21, 27, 28, 29, 32, 39, p. 41 (measurements) 

 pp. 42, 44, 46, 53, 73, 74, 76, 80, 194, 223, 271 (notes on biology), pp. 273, 275, 276 (food), pp 

 278, 279, 283, p. 285 (Kristineberg, Sweden; 30-40 meters; details), p. 286, figs. 6, 7, 19, 45, 56- 

 58, 332-337.— ^IottTE^'SB^^, Danmarks Fauna, No. 27, 1924, pp. 23, 24 (description; distribution), 

 fig'. 4 (pentacrinoid), fig. lOj; Skr. Norske Vid. Selsk. Trondhjem for 1923, No. 3, 1925, pp. 16, 19.— 

 KoEHLER, Les fichinodermes des mers d'Europe, II, 1927, p. 123 (in key), pp. 125, 126 (refer- 

 ences; description; distribution).— Mortensen, Handbook of the echinoderms of the British 

 Isles, 1927, p. 13 (eggs and young larvae), p. 30 (diagnosis; habits; parasites; range; remarks); 

 fig. 5, p. 15 (rayzostomes) ; fig. 12, p. 27 (cirrus); fig. 13, p. 28 (part of arm); fig. 17, p. 31 (pen- 

 tacrinoids).— \ioRTENSBN and Lieberkind, Die Tierwelt der Nord- und Ostsee, Lief. 12, 1928, 

 p. viii. 4 (in key), p. viii. 55 (a boreo-lusitanian species), p. viii. 56 (range in detail), p. viii. 86 

 (food and feeding habits), p. viii. 87 (food), p. viii. 107 (free eggs; spawning period; size of 

 eggs), p. viii. 124 {Loiosoma); fig. 2, 2, p. viii. 3 (cirrus); fig. 3A,C, p. ^^ii. 4 (part of arm with 

 genital pinnules); fig. 90, p. viii. 51 (distribution); fig. 114, p. viii. 112 (two pentacrinoids).— 

 Lieberkind, Zoology of the Faroes, pt. 60, Eohinoderraa, 1929, p. 1 (localities). — Lonnbero 

 and Hellstr6.«, Ark. Zool., vol. 23, No. 15, 1932, p. 15 (carotenoid pigments). — Dj.ikonov, 

 Les Cchinodermes des mers arctiques (in Russian), Leningrad, 1933, p. 22 (in key), p. 24 (char- 

 acters; range), fig. 12A, p. 25.— Gisl£x, Kungl. Fysiogr. Siillsk. Lund Forh., new ser., vol. 45, 

 No. 11, 1934, p. 18. — LoNNBERG, Ark. Zool., voL 26, No. 7, 1934, pp. 10, 11 (pigments). — Ek- 

 MAN, Tiergeographie des Meeres, 1935, p. 156. — Kolosvart, Folia zool. hydrobiol. Riga, vol. 9, 

 1936, p. 83 (in Hungarian National Museum). — Mortensen, Kongl. Danske Vid. Selsk. Skr., 

 nat. math., ser. 9, vol. 7, No. 1, 1937, p. 61 (larva compared with that of Tropiometra audmiini). — - 

 KoLosvARY, Festschrift fur Embrik Strand, vol. 2, 1937, p. 469; Zool. Anz., vol. 121, 1938, p. 47, 

 fig. 2 (centrodorsal in side view). — Terslin, Vid. Medd. Nat. Foren. K0benha\'Ti, vol. 102, 1938, 

 p. 15 (named by Ileding; new record from southern Kattegat, first from Danish waters), p. 16, 

 fig. 1 (cirrus). — GisL^N, Lunds Univ. Arsskr., new ser., Avd. 2, vol. 40, No. 8, 1944, p. 80. — 

 Le Danois, Les profundeurs de la mer, Paris, 1948, pp. 115, 245. — Cu£not in Grass^, Traite de 

 zoologie, vol. 11, 1948, p. 54. — Einarsson, The zoology of Iceland, vol. 4, pt. 70, 1948, p. 4 

 (range; note-s), p. 48 (member of boreal littoral-sublittoral fauna), p. 53 (lecithotrophic pelagic 

 larvae), pp. 58, 61 (distribution). — Mortexsen in Braestrup, Vort Lands Dyreliv, Copenhagen, 

 vol. 2, 1950, p. 134. — Torto.nese, Atti Accad. Ligure, vol. 8, 1952, p. 9. — Htman, The inver- 

 tebrates, vol. 4, Echinodermata, 1955, p. 46 (carotenoid pigment), p. 105 (temperature tolerance), 

 p. 106 (food and feeding behaviour), p. 115 (occurrence in aggregations), fig. 42 (ciliary currents 

 of disk). — Gisl£n', Allantide Rep., No. 3, 1955, p. 89 (short description); pi. 1, fig. 1, pi. 2, fig. 5. 

 Anlednn (Aleclo) petasus Grieg, Bergens Mus. Aarsb. for 1888, No. 2, 18S9, p. 3 (Moster). 

 Antedon rosacea (part) Aurivillius, Bihang till k. Svensk. Akad. Handl., vol. 24, Afd. 4, No. 3, 

 1898, p. 11 (Kristineberg; breeding season). 



Diagnostic features. — Pj is intermediate in length between Pi and P3, and resembles 

 P, ; there are not more than 18 cirrus segments, of which the outer are moderately 

 compressed laterally and in lateral view are broader than the pro.ximal; the longer 

 proximal segments are about half again as long as broad, the sixth and following 

 gradually decreasing in length to the last, which is about as long as broad; there are 

 usually more than XL cirri; there are no interradial perisomic plates; the brachials are 

 usuallv' almost cyhndrical, not markedly flared or convex in lateral view. 



[Notes by A. M. C] Judging from the few Scandinavian specimens in the Brit- 

 ish Museum, the relationship of P,, P,, and P3 is not invariable, one specimen from 

 Norway, at least, has P2 the same size as, or not more than 0.5 mm. longer than, the 

 corresponding P3. 



The British Museum specimens and Mortensen's figure (1924 and 1927) indicate 

 that the dorsoventral widening of the cirri in their outer part is usually less marked 

 than in bifida (sco fig. 13o, p. 198). 



