1114 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Rhodocrinua gigas Billings. 



Rhodocrinus gigas Billings, Geol. Surv. Canada, dec. 4, 1859, pi. 6, fig. 3. 



Trenton: Ottawa, Ontario. 



Observation. — Not recognized. Founded on stem fragment. 



Rhodocrinus Halli Lyon. See Dimerocrinus halli. 



Rhodocrinus (Thysanocrinus) immaturus Shumard. See Gazacrinus immaturus. 



Rhodocrinus (Thysanocrinus) lilliformis Shumard. See Dimerocrinus lilli- 

 formis. 



Rhodocrinus (Lyriocrinus) Melissa Hall. See Lyriocrinus melissa. 



Rhodocrinus microbasilis Billings. See Archseocrinus microbasilis. 



Rhodocrinus pyriformis Billings. See Archseocrinus pyriformis. 



Rhodocrinus? rectus Hall. See Crinocystites? rectus. 



Rhodocrinus (Lyriocrinus) sculptilis Hall. See Lyriocrinus sculptilis. 



Rhodocrinus vesperalis White. See Diabolocrinus vesperalis. 



RHOMBODICTTON Whitfield. Genotype: R. reniforme Whitfield. 



Rhombodictyon Whitfield, Bull. Amer. Mus. Nat. Hist., 1, 1886, p. 347.— Miller, 

 N. A. Geol. Pal., 1889, p. 164.— James, J. F., Jour. Cincinnati Soc. Nat. Hist., 

 14, pt. 1, 1891, p. 57. 



Rhombodictyon discum Whitfield. 



Rhombodictyon discum Whitfield, Bull. Amer. Mus. Nat. Hist., 1, 1886, p. 348, 

 pi. 35, fig. 1.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 877, fig. 

 Chazyan (Normanskill): Kenwood, Albany County, New York. 



Rhombodictyon globosum James. 



Rhombodictyon globosus James, J. F., Jour. Cincinnati Soc. Nat. Hist., 14, pt. 1, 



1891, p. 57, figs. 2a-c. 

 Eden(?): Cincinnati, Ohio. 



Rhombodictyon reniforme Whitfield. 



Rhombodictyon reniforme Whitfield, Bull. Amer. Mus. Nat. Hist., 1, 1886, p. 347, 

 pi. 35, figs. 2-7.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 879, 

 figs. 

 Chazyan (Normanskill): Kenwood, Albany County, New York. 



Rhombodictyon reniforme rhombiforme Whitfield. 



Rhombodictyon reniforme var. rhombiforme Whitfield, Bull. Amer. Mus. Nat. 



Hist., 1, 1886, p. 348, pi. 35, figs. 8, 9. 

 Chazyan (Normanskill) : Kenwood, Albany County, New York. 



Rhombopora granulifera Ulrich. See Batostomella granulifera. 



RHOMBOPTERIA Jackson. Genotype: Avicula mira Barrande. 



Rhombopteria Jackson, Mem. Boston Soc. Nat. Hist., 4, 1890, pp. 330-380; Amer. 



Nat., 24, 1890, p. 1141.— Dall, Zittel-Eastman Textb. Pal., 2d ed., 1913, 



p. 444. 



Newsomella (subgenus of Rhombopteria) Foerste, Bull. Sci. Lab. Denison Univ.; 



14, 1909, p. 68. (Genotype: Rhombopteria ulrichi Foerste.) 



Rhombopteria (Newsomella) divaricata Foerste. 



Rhombopteria (Newsomella) revoluta Foerste, Bull. Sci. Lab. Denison Univ., 



14, 1909, p. 68, pi. 4, figs. 63a-c. (Name R. divaricata suggested at end.) 

 Niagaran (Waldron): Newsom, Tennessee. 



