A MONOGRAPH OF THE EXISTING CRINOIDS 



439 



five additional specimens were recorded from station 5482, and notes on them were 

 given. In my monograph on the crinoids of the Indian Ocean published in 1912 I 

 listed this species and gave the synonymy and range. In my memoir on the unstalked 

 crinoids of the Siboga expedition I inserted the species in a key to the species of 

 Asterometra and gave the range. In 1929 I recorded three specimens that had been 

 found on the Cape St. James-Hong Kong cable off Cape Padaran in 80 fathoms by 

 Mr. R. H. Ellis of the cable repair ship Patrol. This record was cited by Prof. Torsten 

 Gisl6n in his account of a collection of crinoids from French Indo-China and the 

 Macclesfield Bank published in 1936. In 1936 I recorded and gave notes on 5 speci- 

 mens dredged by the Willebrord Snellius off Zamboanga in southern Mindanao. 



ASTEROMETEA LONGIC1RHA (P. H. Carpenter) 



Antedon longicirra P. H. CARPENTER, Challenger Reports, Zoology, vol. 26, part 60, 1888, p. 103 

 .(description; Challenger station 192); pi. 17. BELL, Journ. Linn. Soc. (Zool.), vol. 24, 1893, 

 p. 339. HARTLAUB, Bull. Mus. Comp. Zool., vol. 27, No. 4, 1895, p. 130 (systematic and bathy- 

 metrical relationships). A. H. CLARK, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 136 (comparison 

 with A. anihus). HAMANN, Bronns Klassen und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 

 1907, p. 1578 (listed). A. H. CLARK, Crinoids of the Indian Ocean, 1912, p. 33 (identity). 



Antedon longicirri S. and R. M. PACE, Zool. Rec., V. Echinoderma, 1907, Dec. 1908, p. 38 Ech. 

 (editorial error). 



Ptilometra longicirra A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 359 (listed). 



Asleromelra longicirra A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 147 (compared 

 with A. mirifica); Vid. Medd. Naturh. Foren. K0benhavn, 1909, p. 182 (compared with A. 

 lepida [anthus]) ; Proc. U. S. Nat. Mus., vol. 39, 1911, p. 547 (compared with A. cristata); 

 Crinoids of the Indian Ocean, 1912, p. 33 (identity); p. 190 (synonymy; locality); Smithsonian 

 Misc. Coll., vol. 61, No. 15, 1913, p. 43 (published references to specimens in the B. M.; Challeng- 

 er station 192; characters); Unstalked crinoids of the Siboja-Exped., 1918, p. 141 (in key; 

 range), p. 142 (synonym}' ; notes; station 260), p. 275 (listed). 



Antedon longicina Zool. Rec. for 1912, 1913, p. 54 Echin. 



Diagnostic features. The IBri have a slightly elongated sharp median tubercle or 

 a short median ridge, the axillaries have three tubercles, and the first two brachials 

 each have a prominent sharp tubercle; 10 arms 100-105 mm. long; cirri X-XX, 

 80-98, 70-80 mm. long. 



Description. The centrodorsal is subconical with the cirrus sockets arranged 

 in 10 columns. 



The cirri are about XX, about 80, 80 mm. or more in length. The longest 

 proximal segments are longer than broad. The middle segments are slightly com- 

 pressed laterally and gradually develop a dorsal keel which becomes rather large 

 on the shorter terminal segments but is much reduced in size toward the end. The 

 terminal claw is very small. 



The ends of the basal rays are just visible above the centrodorsal. 



The radials are rather long and oblong. The IBr, are oblong. The IBr 2 (axillaries) 

 are pentagonal. The IBr 2 and the first two brachials have sharp lateral edges and 

 flattened sides. The IBri are very convex dorsally and bear a short median ridge 

 or tubercle that rises to a sharp angle in the middle. The IBr 2 bear three more or 

 less pointed tubercles. 



The 10 arms are about 100 mm. long and consist of over 100 brachials of which the 

 lower are triangular, broader than long, and those succeeding gradually become 

 carinate so as to develop a forward-projecting dorsal spine. Beyond the thirtieth 



