232 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Pourtal^s from the Tortugas there remains scarcely a doubt that Carpenter's species 

 is also a variety of echinoptera very close to var. rubiginosa. 



Hartlaub recorded and described a number of specimens under the names 

 Adinometra echinoptera var. rubiginosa, Adinometra echinoptera var. meridionalis- 

 rubiginosa, Adinometra echinoptera var. carinata-rubiginosa, and Actinometra echi- 

 noptera var. flineata. 



In 1918 Dr. L. H. Clark recorded under the name of Nemaster insolitus a specimen 

 of this species from an unknown locality which came to him with the material from 

 the University of Iowa's Bahamas expedition of 1893. The coloration which he 

 gives — the light pinnules and the dark brown spot on each brachial — shows that what 

 he had was an example of this form and not of insolitus (discoidea) . 



After the return of the Blake collection to the Museum of Comparative Zoology 

 at Cambridge I examined PourtalSs' original specimens and confirmed Hartlaub's 

 suggestions regarding the identity of PourtalSs' rubiginosa and Carpenter's lineata, 

 and also noted that Pourtal^s' type from Orange Key had 11 arms and not 10 as 

 described by him. In my report upon the crinoids of the University of Iowa's 

 Barbados- Antigua expedition of 1918 which was published in 1921 I therefore sub- 

 stituted the name rubiginosa for lineata in the records of the crinoids already known 

 from Barbados. 



NEMASTER DISCOIDEA (P. H. Carpenter) 



Plate 19, Figures 46, 47; Plate 20, Figure 48 



[See also vol. 1, part 1, fig. 232 (ventral view of centrodorsal) , p. 247; fig. 324 (cirrus), p. 279; 

 fig. 451 (dorsal view of radial pentagon), p. 353; part 2, figs. 9, 10 (centrodorsal and radials). 

 p. 6; figs. 384, 385 (pinnule tip), p. 243; figs. 605, 606 (comb), p. 311] 



Actinometra discoidea {nomen nudum) von Graff, Challenger Reports, Zoology, pt. 27, 1884, p. 

 19 (myzostomes) ; p. 37 (Blake stations 155, 203; myzostomes). — P. H. Carpenter, Chal- 

 lenger Reports, vol. 26, Zoology, pt. 60, 1888, pp. 58, 316, 317, 368, 382.— Hartlaub, Nova 

 Acta Acad. German., vol. 58, No. 1, 1891, p. 101 (Caribbean representative of the Pimbriata 

 group). — Hamann, Bronns Klassen u. Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1585 

 (listed).— Hartlaub, Mem. Mus. Comp. Zool., vol. 27, No. 4, 1912, pp. 280, 281, 413 { = echi- 

 noptera); p. 421 (Blake station 155; myzostomes). 



Actinomeier discoidea Springer, BuU. Lab. Nat. Hist. Univ. Iowa, vol. 5, 1903, p. 220 (comparison 

 with Act. iowensis). 



Comaster discoidea A. H. Clark, Proc. U. S. Nat. Mus., vol. 33, 1908, p. 686 (lifted); vol. 35, 1908, 

 pp. 120, 123 (arm structure); p. 124 (listed). 



Actinometra echinoptera var. discoidea (part) Hartlaub, Mem. Mus. Comp. Zool., vol. 27, No. 4, 

 1912, p. 417 (Blake station 231); p. 419 (discussion); pp. 463-469 (detailed description and 

 discussion; Montserrat, 88 fathoms; Martinique, 96 fathoms; Dominica, 118 fathoms; St. 

 Vincent; Barbados, 1873, Capt. Werner [Kiel Mus.]) ; pi. 17, figs. 7, 9, 15. 



Actinometra echinoptera var. ruhiginosa-discoidea Hartlaub, Mem. Mus. Comp. Zool., vol. 27, No. 

 4, 1912, p. 417 (Blake station 231); p. 418 (St. Vincent, 95 fathoms); pi. 17, fig. 9. 



NemaJer insolitus A. H. Clark, Proc. Biol. Soc. Waslungton, vol. 30, 1917, p. 65 (detailed descrip- 

 tion; Albatross station 2146); Univ. Iowa, Studies in Nat. Hist., vol. 9, No. 5, 1921, p. 23 

 ( = N. discoidea). 



Nemaster discoidea A. H. Clark, Univ. Iowa, Studies in Nat. Hist., vol. 9, No. 5, 1921, p. 8 (obtained 

 by the Barbados-Antigua expedition) ; p. 11 (occurrence at Barbados); p. 23 (stations 50, 51, 

 70, 79, 85, 92, 101; Barbados); pp. 27, 28 (listed); The Danish Ingolf-Exped., vol. 4, No. 5, 

 Crinoldea, 1923, p. 38 (range). 



