196 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Salammbo, No. 53, 1956, p. 4 (listed), p. 8 (moroccana a synonym?). [ANONYMOUS], Plymouth 

 marine fauna, ed. 3, 1957, p. 358 (localities; breeding season; parasites). DIMELOW, Nature, 

 vol. 182, 1958, p. 812 (pigments; response to light). BARRETT and YONGE, Collins pocket 

 guide to the seashore, London, 1958, p. 177, pi. 26, figs, a, b. NICHOLS, Quart. Journ. Micr. 

 Sci., vol. 101, pt. 2, 1960, pp. 105-117 (histology of the tube feet and their role in feeding). 

 URSIN, Medd. Danmarks Fisk. Havundersog., new ser., vol. 2, No. 24, 1960, p. 26. BALES, 

 The littoral fauna of the British Isles, ed. 3, 1961, p. 228, pi. 29, fig. 88.* 



Crinoides CUENOT, Compt. Rend. Acad. Sci., vol. Ill, No. 22, 1890, pp. 836-839 (nervous system). 

 PERRIEB, Verb. Internet. Zool. Congr. Berlin 1901, 1902, pp. 336-338 (fixation). 



Antedon rosaceae PARKES, Manchester Microsc. Soc. Trans, for 1890, 1891, p. 48 (cysts). 



Comalula decameros P. H. CARPENTER, Journ. Linn. Soc. (Zool.), vol. 24, 1891, p. 69 (of Gray = rosacea 

 (bifida]). 



Antedon rosea DANIELSSEN (part), Den Norske Nordhavsexpedition, 1876-78, vol. 5, 1892, p. 17 (error 

 for rosacea; anatomy). 



Crinoids LANKESTER, Nature, vol. 51, Jan. 24, 1895, p. 289 (apical nervous system; history of dis- 

 covery). A.H. CLARK, Smithsonian Misc. Coll., vol. 72, No. 11, 1921, pp. 1-20 (relationships 

 with other echinoderms and with the Crustacea). 



Autedon rosaceus VALLENTIN, Journ. Roy. Inst. Cornwall, Truro, vol. 13, pt. 3, 1897, May 1898, p. 260 

 (Falmouth; becoming rare). 



Antedon petasus (not of Diiben and Koren, 1846) A. H. CLARK, Fisheries, Ireland, Sci. Invest. 1912, pt. 

 4, 1913, p. 1 (localities in west Ireland). VANEY, Bull. Mus. Hist. Nat., Paris, vol. 20, No. 1, 

 1914, p. 26 (Pourquoi Pas? Sta. 60). HARTMEYER, Mitt. Zool. Mus. Berlin, vol. 8, No. 2, 1916, 

 p. 236 (Tenby; Cat. No. 3177). 



Antedon (bifida) rosacea MEEK, Rep. Dove Marine Lab., new ser. vol. 13, 1924, p. 110 (stations off 

 Northumberland) . 



Antedon roseus [ANONYMOUS] Encyclopaedia Brittanica, ed. 14, vol. 6, 1929, p. 722. 



Starfish, [ANONYMOUS] Encyclopaedia Brittanica, ed. 14, vol. 7, 1929, fig. 4, p. 896. 



Diagnostic features. P 2 is of the same length as P 3 and resembles it, though it does 

 not bear a gonad; PI is about twice as long as these and is composed of more than 25 

 segments; there are not more than 18 (usually 14 to 16) cirrus segments of which the 

 outer are moderately compressed laterally, shorter than the proximal, and slightly 

 longer than broad; on average the wider distal segments are half again as wide as the 

 narrower proximal ones; the cirri rarely exceed XL in number; interradial perisomic 

 plates are frequently (but not always) present; the IBr! are very short, especially in 

 larger specimens, and then* slightly converging lateral edges form distinct angles with 

 the projecting lateral corners of the axillaries. 



Description. Centrodorsal low truncated conical or flattened hemispherical, 

 bearing cirrus sockets in two or three crowded and irregular more or less alternating 

 rows; the bare polar area is of moderate size, slightly convex, flat, or slightly concave, 

 smooth, or more or less covered with shallow pits. 



Cirri XX-XXXV (exceptionally as many as XL VI), 10-18 (usually 14-16), from 9 

 to 12 mm. long; first segment short, second about twice as broad as long, third slightly 

 longer, fifth the longest, from one third to one half again as long as broad; the remaining 

 segments gradually decrease in length, the distal being only very slightly longer than 

 broad; the penultimate segment bears a small subterminal opposing spine or tubercle. 

 The cirri are basally almost circular in cross section, becoming gradually flattened dis- 

 tally, thus when viewed from the side appearing slowly to increase in diameter. The 

 segments in the proximal half have slightly expanded articulations, this feature dying 



* See also Addenda (pp. 835, 836) under 1957, 1962. 



