PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 99 



times as long as broad distally. The segments are cylindrical and smooth, with little 

 or no development of spines on the distal edges. P 2 is 4 mm. long, very slightly stouter 

 than P 1( composed of 12 segments, of which the distal are more elongated than those of 

 PI. P 3 is 5 mm. long, with about 12 segments, about as stout basally as P 2 but tapering 

 more slowly and hence appearing stouter, with relatively shorter segments which beyond 

 the third have prominently overlapping and finely spinous distal ends. The pinnules 

 immediately following resemble P 3 . 



Notes [BY A.M.C.]. The above description is of the type specimen, which wa> 

 the only one known until in 1925 Dr. Mortensen published remarks about seven addi- 

 tional specimens from off the northern tip of New Zealand. The cirri of these have 

 12 to 16 segments rather than 17 and the number of segments in the first pinnules also 

 tends to be smaller, 8 segments in P, and 10 in P 2 . Judging from Mortensen 'a figure the 

 centrodorsal is rounded conical. Unfortunately neither he nor Mr. A. H. Clark gave 

 the number of cirri, but in the hitter's diagnosis of Argyromctra, including also A. crix/id 

 (1917, p. 128), the number is given as LX-LXXX. Fell also gives this number but 

 may be quoting from Mr. Clark. 



Localities. North Cape, New Zealand; 110 meters; Dr. Th. Mortensen [A. H. 

 Clark, 1917] (1, U.S.N.M.). Type locality. 



Off North Cape; 110 meters; Capt. Bollons [Mortensen, 1925]. 



Off Three Kings Islands; 175 meters; Capt. Bollons [Mortensen, 1925]. 



Genus EUANTEDON A. H. Clark 



Iridometra (part) A. H. Clark, Proc. U.S. Nat. Mus., vol. 36, 1909, p. 408 (/. exquisita sp. nov.). 



Antedon (part) A. H. CLARK, Notes Leyden Mus., vol. 34, 1912, p. 139. 



Euantedon A. H. CLARK, Smithsonian Misc. Coll., vol. 60, No. 10, 1912, p. 31 (diagnosis and comparison 

 with related genera; type species Antedon moluccana A. H. Clark, 1912); Internal. Rev. gesamt. 

 Hydrobiol. und Hydrogr., vol. 6, 1914, p. 5 (represents in part Anlcdon in the east; range); in 

 Michaelsen and Hartmeyer, Beitrage zur Kenntnis der Meeresfauna \Yes1afrikas, Kchinod., II, 

 Crinoidea, 1914, p. 313 (closely related to Antedon; species; range); Die Crinolden der Antarktis, 

 1915, p. 181 (range; represents in part Anledon in the east); Journ. Washington Acad. Sci., vol. 7, 

 1917, No. 5, p. 127 (referred to the Antedoninae) ; No. 16, p. 505 (in key; range); Unstalked 

 crinoids of the Silioga-Exped., 1918, p. viii (discovered by the Sibogn; wit h Mudigomctrd represents 

 Antedon in the east), p. 197 (in key; range), p. 200 (key to the included species). H. L. CLAHK, 

 Rec. South Australian Mus., vol. 3, No. 4, 1928, p. 369. COTTON and GODFREY, Rec. South 

 Australian Mus., vol. 7, 1942, p. 232. H. L. CLARK, Eehinoderm fauna of Australia, I'.Mi'.. 

 p. 60 (in key), p. 61 (type species; distribution). 



Diagnosis. A genus of Antedoninae in which the cirri are XXV-L; P,, though 

 elongated, is shorter than the cirri, more or less stiffened, and composed of less than 

 25 segments; P ; is of the same character as P,, but shorter; P 3 is shorter still and is of the 

 same length and character as the succeeding pinnules. 



Type species. Antedon moluccana A. H. Clark, 1912. 



Geographical range. From the Philippines and Moluccas to China, eastward to the 

 Society Islands and south to St. Vincent Gulf, South Australia. 



Bathymrlrical range. From the shore line down to 397 meters. 



Remarks [by A.M.C.]. As stated in the discussion of this subfamily on p. 50, the 

 diagnosis of this genus has had to be modified with regard to the limitation in the 

 number of segments in PI in order to accommodate the species Euaitii<l<nt jxnicicirra 

 H. L. Clark, 1928. The wide range of other genera and even species with regard to the 

 number of segments in PI makes it unlikely that the difference between 12 and 18 seg- 



