PAR/T 5 A MONOGRAPH OF THE EXISTING CRINOIDS 111 



a slight central constriction; the outer in lateral view have a quite straight dorsal, and 

 a nearly straight ventral, profile. 



The distal border of the radials is even with the rim of the centrodorsal. 



The IBri are very short, from five to six times as broad as long, with the distal 

 and proximal edges parallel and the lateral edges slightly convergent, making an anglr 

 of about 90 with those of the adjacent IBri, the perisomic area thus exposed beiri<_' 

 entirely covered by a conspicuous group of perisomic interradials. The lBr ; (axil- 

 lanes) are triangular, half again as broad as long, with the anterior angle somewhat 

 produced. 



The 10 arms are 105 mm. long, becoming extremely slender and attenuated dis- 

 tally; the brachials resemble those of the other species of the genus; their distal edges 

 are slightly produced and finely spinous. 



Syzygies occur between brachials 3+4, 9 + 10, 14 + 15 and distally at intervals of 

 3 muscular articulations. 



PI is 15 mm. long, composed of 30 segments, of which the first is broader than 

 long, the second half again as long as broad, and the third and following twice as long 

 as broad, becoming longer in the distal half; from about the fifth onward the segments 

 have overlapping and prominently spinous distal ends; the pinnule is considerably 

 stouter basally than P 2 and the succeeding pinnules, but becomes exceedingly attenu- 

 ated and flexible in the distal half. P 2 is 10 mm. long, with 24 segments, more slender 

 than P, and with relatively longer segments, which have more prominently spinous 

 distal ends. P 3 is 7 mm. long, with from 13 to 15 segments, tapering more gradually 

 than P 2 and hence appearing stouter, and without the long flagellate tip. P t appar- 

 ently resembles P 3 , but is somewhat shorter. 



Locality. Tahiti, Society Islands [A. H. Clark, 1918] (1, Munich M.). 



Genus ANTEDON de Freminville* 



btKOKvriiios LINCK, De Stellis marinis, Leipzig, 1733, p. 55. LBUCKART, Zeitschr. organ, physik, veil. 

 3, 1829, p. 377. W. B. CARPENTER, Phil. Trans. Roy. Soc., vol. 156, 1866, p. 678 (history). 

 P. H. CARPENTER, Trans. Linn. Soc. (Zool.), ser. 2, vol. 2, 1879, p. 2 (history). 



Asterias (part) LINNAEUS, Systema Naturae, ed. 10, vol. 2, 1758, p. 603; ed. 12, 1767, p. 1098. 

 PENNANT, British zoology, vol. 4, 1777, p. 55. RETZIUS, Kungl. Svenska Vet.-Akatl. Ilandl.. 

 1783, vol. 4, p. 241. OLIVI, Zoologia adriatica, Hassano, 17'.i2, p. liti. NKMXICH, Allgernciues 

 Polyglotten-Lexicon der Naturgeschichte, vol. 1, 1793, pp. 1172, 1490. RETZIUS, Dis-c-i. 

 sistcns species cognitas asteriarum, Lundae, 1805, pp. 33-35.- TREVIHAXDS, Biologie, Gottingen, 

 vol. 3, 1805, p. 44. RAFINESQUE, Principes fondarnontaux de sotniologir, Palermo, 1814, p. 24. 

 TIEDEMANN, Anatomie der Rohren Holothurie, Landshut, 1816, p. 36. GRIFFITH, Cuvier's 

 Animal Kingdom, 1835, p. ex. W. B. CARPENTER, Phil. Trans. Roy. Soc., vol. 156, 1866, p. 

 680. P. H. CARPENTER, Trans. Linn. Soc. (Zool), ser. 2, vol. 2, 1879, p. 2. 



Asteria (part) BRUNNICH, Zoologiae fundamenta, Copenhagen & Leipzig, 1772, p. 230. 



Antedon DE FREMINVIM.E, Bull. Soc. Philom. Paris, vol. 2, 1811, p. 349. KAFIXKSWE, Analyse de la 

 nature, Palermo, 1815, p. 153. [Bosi ], Nouveau Diotionnaire d'Histoire Xaturelle, vol. 2, 1816, p. 

 136; vol. 7, 1817, p. 3'.!i. DE BLAINVILLE, Diet. Sci. Nat., vol. 10, ISIS, p. 107. LAMOUROUX, En- 

 cyclopedic methodique, vol. 2, 1824, p. 204. DE BI.AIXVILI.E, Diet. Sci. Nat., vol. 60, 1830, p. 

 230. [GERVAIS], Dictioiinaire universel d'histoire naturelle, vol. 4, 1844, p. 130. GRAY, List of 

 British animals in the British Museum, pt. 1, C'entroniac or radiated animals, 1848, p. 28. 

 DUJARDIN and Hupfi, Histoire naturelle des zoophytes, fichinodermes, 1862, p. 1!)2. CAKI -. 

 Handbuch der Zoologie, vol. 2, 1863, p. 515. NORMAN, Ann. Man. Nat. Ili^t., ser. 3, vol. 15, 1865, 

 p. 101. WYVII.US THOMSON-, Phil. Trans. Roy. Soc., vol. 155, 1865, pp. 513-544. BOHLSCHE, 



*See also Addenda (pp. 835-837) under 1956, 1957, 1962, 1963, 1965. 



