A MONOGRAPH OF THE EXISTING CRINOIDS 589 



Comatula (Aclinomelra) loahlbergii J. Muller, Abhandl. d. k. preuss. Akad. d. Wiss., 1847, 1849, 



p. 256 (redescribed). — A. H. Clark, Criiioids of the Indian Ocean, 1912, p. 30 (identity). 

 Comatula coccodistoma (part) Dujardin and Ilupfi, Ili.st. nat. des zoophytes, Echinodermes, 1862, 



p. 208 (listed). 

 Aclinometra waldhergii Dujardin and Ilupf., Hist. nat. des zooi)hytes, Echinodermes, 1862, p. 211 



(redescribed) . 

 Comatula wahlbergi von Martens, in Von der Dccken's Rcise in Ostafrica, vol. 3, 1869, p. 129 



(Natal; from Muller). 

 Actinometra wahlberghii P. H. Carpenter, Proc. Roy. Soc, vol. 28, 1879, p. 386; Trans. Linn. Soc. 



(Zool.), ser. 2, vol. 2, 1879, p. 27 (identified as an Actinometra) . 

 Actinometra wahlbergi Bell, Proc. Zool. Soc. London, 1882, pp. 534, 535 (listed). — P. H. Carpenter, 



Proc. Zool. Soc. London, 1882, 1883, p. 747 (listed). 

 Actinometra parvicirra P. H. Carpenter, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, p. 331 



(part; Cape of Good Hope); p. 338 (part; Simon's Bay; Cape of Good Hope; Port Natal); 



p. 340 (discussion). — Bell, Marine Invest, in So. Africa, vol. 4, pt. 4, 1905, p. 141 (various 



localities). — A. H. Clark, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 5 (South African records 



are wahlbergii) . — Haktlaub, Mem. Mus. Comp. Zool., vol. 27, No. 4, April, 1912, p. 475 (Cape 



of Good Hope; notes). 

 Antedon capensis (part) Bell, Marine Invest, in So. Africa, vol. 4, pt. 4, 1905, p. 139 (Cape of Good 



Hope) . 

 Comanthus (Bennettia) wahlbergii \. H. Clark, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 17 (synonymy; 



localities; distinct from parvicirra. description). 

 Comanthus wahlbergii A. H. Clark, Bull, du mus. d'hist. nat., Paris, 1911, No. 4, p. 249 (Cape of 



Good Hope); Crinoids of the Indian Ocean, 1912, p. 95 (synonymy; range); Smiths. Miscell. 



Coll., vol. 61, No. 15, 1913, p. 16 (synonymy; localities; characters); Unstalked Crinoids of the 



Siboga Exped., 1918, p. 49 (in key; range). — H. L. Clark, Annals So. African Mus., vol. 13, 



pt. 7, 1923, p. 231 (synonymy; Simon's Bay; range); pi. 8, fig. 3. 

 Actinometra paucicirra (B. M., MS.) A. H. Clark, Smiths. Miscell. Coll., vol. 61, No. 15, 1913, 



p. 16 (Cape of Good Hope). 

 Comanthus wahlbergi A. H. Clark, Die Crinoiden der Antarktis, 1915, p. 166 (synonymy; Simon's 



Bay; characters); p. 167. 

 Comanthus (Cenolia) wahlbergii A. H. Clark, The Danish Ingolf Exped., vol. 4, part 5, Crinoidea, 



1923, p. 39 (range). 



Diagnostic features. — The usually 16-20 arms are short, broad, and rapidly 

 tapering, usually from (30 to 80 mm. in length The cirri, which are relatively stouter 

 than those of C. trichoptera and the Tasmanian and New Zealand species and more 

 strongly recurved distally, have usuallj- 15-16 segments and are 10 mm. long. 



Description. — The centrodorsal is a thin, rather broad circular disk with the 

 dorsal surface flat or slightly concave and from 2.5 to 4 mm. in diameter. It resembles 

 very closely the centrodorsal of C trichoptera. 



The cirri are always numerous and well developed, XII-XXV (usually XIV-XX), 

 12-17 (usually 15-16), 10 mm. long in fully grown examples. The first segment is 

 very short and those following gradually increase in length, so that the fifth or si.xth 

 is twice as long as its proximal width. The next is nearly as long, and those succeeding 

 decrease in length, so that the eighth or ninth and following are as long as broad, or 

 slightly broader than long. The fifth, sixth, or seventh (usually the sixth) is a well- 

 marked transition segment. The transition and following segments have the distal 

 dorsal edge slightly everted, this cversion appearing as a minute subterminal tubercle 

 in lateral view. On the last few segments this eversion of the distal dorsal edge 

 moves basally and becomes a submedian transverse ridge, but it does not narrow 



