PAilT 5 A MONOGRAPH OF THE EXISTING CRINOIDS 247 



Egypt, No. 21, 1937, The fishery grounds near Alexandria. XIII. Echinoderma, p. 28 (local 

 distribution), pp. 28-29. — Kolosvary, Festschrift fiir Embrik Strand, vol. 2, 1937, p. 469 (com- 

 parison with A. adriatica). — Toktonese, Boll. Mus. Zool. Univ. Torino, vol. 46, ser. 3, No. 82 

 1938, p. 5 (listed), pp. 44-45 (synonymy; material; color); Boll. Zool., year 9, Nos. 5-6, 1938, 

 p. 267, p. 269 (occurrence off Tripolitania). — Bruun, Bull. Stat. Octanogr. Salammbo, No. 40, 

 1940, p. 17 (listed). — Toktonese, Ann. Mag. Nat. Hist., ser. 11, vol. 13, 1946, p. 715 (habitat; 

 color variations). — B.^cci, Pubbl. Staz. Zool. Napoli, vol. 20, 1947, p. 171 (Gulf of Naples; bot- 

 tom communities), p. 172. — Vatova, Pubbl. Staz. Zool. Napoli, vol. 21, 1947, p. 60. — Cu6not 

 in Grass6, Traits de zoologie, vol. 11, 1948, pp. 45, 71. — Dawtdoff in Grassd, Trait6 de zoologie, 

 vol. 11, 1948, fig. 357 (larva). — Toktonese, Bull. Inst. Oc^anogr. Monaco, No. 956, 1949, p. 4 

 (bathymetrical range), p. 15 (listed). — Mijli.eger, Aquar. Terrar. Z. Stuttgart, vol. 4, 1951, 

 p. 18, fig. 4 (photograph of hve specimen standing on the arm tips; elementary description; color), 

 pp. 18-19 (developmental stages). — Toktonese, Atti Accad. Ligure, vol. 8, 1952, p. 168 (in table 

 of habitat), pp. 169-172 (occurrence in Ligurian Sea; color; cirri), fig. 2; BuU. Inst. Zool. Univ. 

 Torino, vol. 4, No. 4, 1954, pp. 9, 10 (Israel); Bull. Stat. Aquicult. PIche, Castiglione, new ser.. 

 No. 7, 1955, pp. 207-209. — Hyman, The invertebrates, vol. 4, Echinoderraata, 1955, pp. 62, 63 

 (nervous system), p. 73 (spawning time), p. 103 (response to mechanical stimulation), p. 108 

 (regenerative powers), fig. 30B and C. — Cherbonnier, Les (5chinodermes, Monte Carlo, 1955, 

 p. 93; Bull. Stat. Oc^anogr. Salammbo, No. 53, 1956, p. 4 (listed), p. 7 (stations off Tunisia).— 

 Tortonese, Ann. Mus. Civ. Stor. Nat. Genova, vol. 68, 1956, p. 181 (localities of Tortonese 

 collection specimens); BuU. Res. Council Israel, vol. 6B, Nos. 3-4, 1957, pp. 189, 190 (small size 

 in Israel). — Gautier-Michaz, Ann. Inst. Oc&mogr., Paris, new ser., vol. 34, 19.58, pp. 146, 147 

 {Calypso stations), p. 155. — Kerneis, Vie et Milieu, vol. 11, No. 2, 1960, p. 171. — Costa, Vie et 

 Milieu, vol. 11, No. 1, 1960, p. 22 (off Marseille), p. 50. — Tortonese and Demir, Publ. Hydrobiol. 

 Res. Inst. Univ. Istanbul, vol. 5, pts. 1, 2, 1960, p. 9 (Aegean Sea, Sea of Marmara, Bosphorus). — 

 Cognetti and Santarelli, Boll. Pesca, Piscic., Idrobiol., new ser., vol. 14, p. 13 (Gulf 

 of Naples). — Tortonese, Publ. Hydrobiol. Res. Inst. Univ. Istanbul, vol. 5, pts. 1, 2, 1960, 

 p. 34 (replaced by ^4. bifida [i.e. A. bifida moroccana] along shores of Algeria). — Zavodnik, Biol. 

 Vestnik, Ljubljana, vol. 8, 1961, p. 49. — Tortonese, Thalassia Jonica, vol. 4, 1961, p. 190 

 (Ionian Sea). 

 Antedon roseum (Hamburg Mus., MS) A. H. Clark, Smithsonian Misc. Coll., vol. 60, No. 10, 1912, 

 p. 30. 



Diagnostic features [modified by x\.M.C.]. — There are IS to 30 (usualh^ 20 to 23) 

 cirrus segments, all of which but the first two or three are longer than wide and cen- 

 trally constricted; the distal only difi"er slightly from the proximal; the outer halves of 

 the cirri are only slightlj', if at all, curled in dorsally in preserved specimens, and in 

 lateral view are not noticeably ^\-ider than the basal halves; the IBr, are relatively 

 long, not more than tliree times as broad as long, regularly oblong or slightly trape- 

 zoidal, the lateral edges usually making a straight Ime, or a very wide angle with those 

 of the axillary; Pj is stout but tapers rapidly, with less than 20 (usually 13 to 15) 

 segments; the disk is naked interbrachially. 



[Note by A.M.C] I cannot account for Koehler's description of 35 to 45 seg- 

 ments for Pi (1921 and 1927); possibly it was derived from earlier descriptions of 

 "rosacea" including bifida. None of the specimens in the British Museum (from the 

 south of France and Naples) has more than about 15 segments in Pi. Koehler 

 apparently checked this section of the typescript but left unmodified Mr. Clark's 

 description of Pi as having up to 18 segments. 



Description. — The centrodorsal is low hemispherical, the bare polar area snuill and 

 more or less convex. The cirrus sockets are arranged in two, or in two and a partial 

 thu-d, more or less alternating and uregular crowded marginal rows. 



The cirri are XX-XXXVI (usually about XXV), 17-25 (usually 20-23), from 15 

 to 20 mm. long; the first segment is short, the second about half again as broad as long; 



