26 TORSTEN GISLÉN, CRINOIDS. 



cremilata-chardicters and are consequently, to a certain extent, intermediate forms. 

 For anyone who wishes to keep the species crenulata it will be difficult to decide 

 where a specimen with the R:s concealed ought to be referred (ef. again the speci- 

 men from St. 7). 



Amphimetra milberti (J. Mull.). 1 



Comatula (Alccto) milberti 1816 .T. Muller op. cit., p. 178. 



Comatula milberti 1862 Dujardin et IIupé op. cit., p. 202. 



Comatula leevissima (part) 1875 Grube op. cit., p. 74. 



Anteäon Icevipinna 1882 P. H. Carpekter op. cit. 5, p. 502. 



Antedon milberti (part) 1884 Bell Linn. Soc. N. S. W. Proc. p. 497: 1884 Dell »Alert», p. 156; 

 1894 Bbll op. cit., p. 394. 



Himerometra milberti 1907 A. H. Clark op. cit. 2. p. 356; 1908 op. cit. 11, p. 215. 



Himerometra discoidea 1908 op. cit. 11, p. 215. 



Amphimetra milberti 1909 A. II. Clark op. cit. 12, p. 7; 1911 op. cit. 32, p. 7«>7 ; op. 33, p. 251); 

 1912 op. 34, p. 111; 1913 op. 41, p. 24; 1914 A. Reichensperger op. cit., p. 95; 1915 A. II. Clark op. cit. 

 12 and op. 43, p. 223. 



Amphimetra formosa 1909 A. II. Clark op. 20, p. 32, op. cit. 25, p. 157. 



Amphimetra discoidea 1911 A. H. Clark op. cit. 31. p. 459: op. cit. 32, p. 7(16: op. cit. 33, p. 250: 

 1912 op. cit. 34, p. 112; 1913 op. 40, p. 393; op. 41, p. 24: 1914 A. Reichensperger op. cit., p. 93; 1915 

 A. H. Clark op. cit. 42 and op. 43. p. 223. 



Localities: Stations 6, 8, 9 and 11, 



Cd thickly discoidal; the open, bare, dorsal surface 3 mm. Borders somewhat 

 swollen towards the fixing places of the C:i. 



C: i XXIII -XXIX in two rows, 26—38, 20—28 mm. The dorsal spines begin 

 at the 9 th or first at the 21 th segment. They are short, ne ver attaining more than 

 V:t of the breadth of the segment and are attached to the distal parts of the seg- 

 ments. Opposing spine twice as large, very acute, pointing outwards perpendicul- 

 arly from the penultimate segment, the fixing snrface taking up almost the whole 

 segment. Terminal claw strongly curved, usually rather slender and very long-pointed, 

 half as long again as the penultimate segment. 



The arms 10, 140 mm, pressed closely against one another, though not at all 

 or very slightly flattened laterally. 



The R:s smooth, discoidal projecting most in the corners, I Br:s 1 united. I Br 

 1 and 2 with a joint process, formed as in A. variipinna, but more set off than in 

 this species. Br:s 1 grown together by pairs on the inside, united with Br:s 1 by a 

 synarthry and provided with a joint prominence. The segments to about Br 10 irre- 

 gularly discoidal with dorsolateral knöts (as described by Carpenter) then triangular- 

 shaped. The arms smooth till about the 50 th — 60 th segment, then slightly collar- 

 shaped. For the syzygies see the scheme. 



| Br 1-23 + 4. . .10 + 11. . . 18 + 19. . . . 25.+26, . • . 34, + 35, . . - 43, + 44, . . . 55,+56, . 

 R.I 1-2 < 

 1 l Br 1-23 + 4 . 



( Br 1-2 3+4 . 

 R,I 1 -2 { 



\ Br 1-2 3+4 . 



10 + 11 . 



. . 18 + 19, . 



. .2.-,, + 20, . 



. 34, + 35, . 



. -43, + 44, . 



11 + 12, . 



. . 18, + 19, . 



. . 29. + 30, . 



. .42, + 43, . 



. . 57, + 58, . 



9 + 10 . . 



. 21 + 22, . . 



. 32, + 33, . . 



. 49, +50, . . 





9+10 . . 



. 10+17, . . 



.20, +30, . . 



. 37, + 38, . . 



. 50, + 51, . . 



1 According to A. II. Clark's Siboga investigation this name is lo 1 »o replaced by A. jaquwoti (J. 

 MOia.) 1846. 



