PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 595 



The first brachials are short and separated by the distal projection of the axillary. 

 They are fairly deeply incised by the second brachials, which are roughly triangiUar 

 and longer than broad. The first syzygial pair is about as long as broad. The brachials 

 between the first two syzygies are rectangular and broader than long. Between the 

 second and third syzj'gies the brachials are wedge-shaped and about as long as broad. 

 Distally they become relatively longer. The arm bases and arms are quite smooth. 



Pi of a small specimen is complete. It has 10 segments tapering evenly from 

 the base to the tip and measures 2.5 mm. in length. The fii'st segment is slightly 

 longer than broad, the rest increasing in relative length. The fourth and fifth are 

 three times as long as broad. 



Po of that specimen is broken. An incomplete P2 of a larger specimen has eight 

 segments and is 4.5 mm. long. 



P3 of the small specimen which is nearly complete has eight segments and is 4 mm. 

 long, the third segment being four times and the fourth five times as long as broad. 



All the syntj^jes are broken. The largest measures 15 mm. from the dorsal pole 

 to the second syzygy, which is a little more than in the type specimen of E. antarctica, 

 where the total length is estimated at about 80 mm. 



Locality.— Scotia, March 18, 1903; Weddell Sea, S.E. of the South Orkney Islands 

 (lat. 62°10' S., long. 41°20' W.); 3426 meters (3, B.M.; 5, Roy. Scottish M.) [Vaney 

 and John, 1939]. 



Genus CARYOMETRA A. H. Clark 



Adelometra (part) A. H. Clark, Proc. U.S. Nat. Mus., vol. 34, 1908, p. 211 (referred to the Ante- 

 donidae, restricted), p. 212 (occurs in the West Indies), p. 236 (A. tenuipes sp. nov.); Univ. Iowa 

 Studies in Nat. Hist., vol. 9, No. 5, 1921, p. 13 (West Indies and Indo-Pacific), p. 16 (in key); 

 The Danish /n^oy-Exped., vol. 4, pt. 5, Crinoidea, 1923, p. 42 (range), p. 53 (in key). 



Coccomeira (part) A. H. Clark, The Danish Ingolf-Exped., vol. 4, No. 5, Crinoidea, 1923, p. 41. 



Psathyrometra (part) A. H. Clark, Smithsonian Misc. Coll., vol. 91, No. 4, 1934, p. 1. 



Caryometra A. H. Clark, Proc. U.S. Nat. Mus., vol. 83, 1936, p. 247 (diagnosis; type species Adelo- 

 metra tenuipes A. H. Clark, 1908) ; Mem. Soc. Cubana Hist. Nat., vol. 14, No. 2, 1940, p. 142 

 (in key; C. monilicirTa, allanlidis, spinosa, alope and lisa spp. nov.). — Gisl^n, Lunds Univ. 

 Arsskr., new ser., Avd. 2, vol. 40, No. 8, 1944, p. 54, footnote. 



Cariomelra A. H. Clark, Mem. Soc. Cubana Hist. Nat., vol. 14, No. 2, 1940, p. 156. 



Diagnosis. — A genus of Zenometrinae including small to medium-sized species, 

 with the arms up to 70 mm. long, in which the conical centrodorsal is without inter- 

 radial ridges, grooves or spaces, the 10 or 15 columns of cirrus sockets not distinctly 

 segregated into radial groups; the peripheral cirri have 22 to 35 much elongated seg- 

 ments; the elements of the di^-ision scries and the brachials have smooth or slightly 

 spinous borders; Pj has 10 to 24 segments of which the outer ones are elongated; Pj has 

 10 to 15 segm.ents; P3 is similar or shorter. 



Type species. — Adelometra tenuipes A. PI. Clark, 1908. 



Geographical range. — Cuba and Puerto Rico and ? southward to Grenada. 



Bathymeirical range. — From 338 (?165) to 777 (?914) meters. 



Bemarks [emended from those for Adelometra including Caryometra, by A.M.C.]. — 

 In 1908 Mr. Clark described a new species from off Cuba under the name Adelometra 

 tenuipes. 



In 1912 Dr. Clemens Hartlaub described Antedon liarthra from a much-mutilated 

 specimen dredged by the Blake off Grenada. Its identity is uncertain but Mr. Clark 



556-622—67 39 



