A MONOGRAPH OF THE EXISTING CRINOIDS 225 



the arms or pinnules. As for the small number of arms, this feature is very variable 

 in this group, as I have had occasion to point out in connection with its eastern 

 representatives. 



Dr. Hubert Lyman Clark spent the month of June, 1917, at the Tortugas, and 

 at every opportunity searched the reefs and shoals in an effort to find at least one 

 comatulid. Dredging was also carried on continually, but not a trace of any sort of 

 crinoid was ever found. 



In 1921 I recorded this species from various stations of the University of Iowa's 

 Barbados-Antigua expedition of 1918, and also from Dominica, from which island 

 there is a specimen in the Yale Museum which was collected by Mr. A. Hyatt Verrill. 



On page 2 of the report upon the unstalked crinoids collected by the Siboga the 

 range of the genus Nemaster as given includes Bermuda, and in his account of the 

 littoral echiuoderms of the West Indies published in 1921 Dr. Hubert Lyman Clark, 

 on my authority, gave Bermuda as a locality for this species. I later learned that the 

 specimen upon which this record rested (of which I published a photograph in 1921) 

 had been taken not in the Bermudas but in the Bahamas. 



NEMASTER RUBIGINOSA (Pourtalfes) 



Plate 19, Figures 42-45 



[See also vol. 1, pt. 1, fig. 147 (centrodorsal), p. 220; fig. 231 (ventral view of centrodorsal) , p. 247; 

 fig. 301 (lateral view of centrodorsal and section of radial pentagon), p. 264; pt. 2, fig. 182 (dorsal 

 view), p. 96; figs. 382, 383 (pinnule tip), p. 243; figs. 607-609 (comb), p. 311; fig. 781 (adambu- 

 lacral deposits), p. 366; pi. 1, figs. 956, 957 (centrodorsal and radi.ils)] 



Antedon rubiginoi>a POURTALES, Bull. Mus. Comp. Zool., vol. 1, No. 11, 1869, p. 356 (off Orange Key, 

 Bahama Bank, 9 fathoms; off Tortugas, 17 fathoms). P. H. CARPENTER, Trans. Linn. Soc. 

 (Zool.), ser. 2, vol. 2, 1879, p. 29 (listed as an Antedon). BELL, Proc. Zool. Soc. London, 1882, 

 p. 533 (listed). 



Antedon, sp. RATFIBDN, Trans. Connecticut Acad. Sci., vol. 5, 1879, p. 157(Pernarubueo, orParahyba 

 do Norte; description). P. H. CARPENTER, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, 

 p. 328, last paragraph. 



Aclinometra lineata P. H. CARPENTER, Journ. Linn. Soc. (Zool.), vol. 15, 1880, p. 198 (centrodorsal 

 and radial articular faces); pp. 213, 214 (same); pi. 12, fig. 27, a, b, (Bahia; centrodorsal and 

 radial articular faces); Proc. Zool. Soc. London, 1882 (1883), p. 747 (specific formula). VON 

 GRAFF, Challenger Reports, Zoology, p. 27, 1884, p. 19 (myzostomes) ; p. 36 (Blake station 285; 

 myzostomes). P. H. CARPENTER, Quart. Journ. Miorosc. Sci., vol. 27, 1887, p. 386 (Bahia; 

 no trace of sacculi); Challenger Reports, Zoology, vol. 26, pt. 60, 1888, p. 327 (Bahia, 7-20 

 fathoms; coast of Brazil; Blake station 285 and possibly also 155); pi. 5, figs. 2, a-e; pi. 60, fig. 

 3. BHAUN, Centralbl. f. Bakteriol. u. Parasitenkunde, vol. 3, 1888, p. 185 (myzostomes; after 

 von Graff). HARTLAUB, Nova Acta Acad. German., vol. 58, No. 1, 1891, p. 101 (Brazilian 

 member of the Fimbriata group). SPRINGER, Bull. Lab. Nat. Hist., Univ. of Iowa, vol. 5, 1903, 

 p. 220 (comparison with Act. ioweniis). HAMANN, Bronns Klassen und Orduungen des Tier- 

 Reichs, vol. 2, Abt. 3, 1907, p. 1585 (listed). A. H. CLARK, Proc. U. S. Nat. Mus., vol. 36, 1909, 

 p. 494 (possesses plated ambulacra). HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 4, 

 1912, pp. 280, 281, 413 ( = echinoptera); p. 419 (a variety of echinoptera); p. 421 (Blake station 

 285; myzostomes); p. 422 (Blake stations 285 and possibly 155; = rubiginosa). 



Aclinometra rubiginosa P. H. CARPENTER, Proc. Zool. Soc. London, 1882 (1883), p. 746 (listed); 

 Challenger Reports, Zoology, vol. 26, pt. 60, 1888, pp. 58, 60, 300, 301, 367, 381 (from Pour- 

 tales). HAMANN, Bronns Klassen und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 1907, p. 

 1585 (listed). 



Aclinometra, sp. P. H. CARPENTER, Challenger Report, Zoology, vol. 26, pt. 60. 1888, p. 329 (Brazil). 

 9729831 16 



