90 BULLETIN 81, UNITED STATES NATIONAL MUSEUM. 



PTYGURA VELATA (Gosse). 



Megalotrocha velata Gosse, Ann. Mag. Nat. Hist., ser. 2, vol. 8, 1851, p. 198. 

 Melicerta ptygura Gosse, Pop. Sci. Rev., vol. 1, 1862, p. 490, pi. 26, fig. d. 

 (Ecistes velatus Hudson and Gosse, Rotifera, 1886, vol. 1, p. 83, pi. D, fig. 8. 



PTYGURA WILSONII (Anderson and Shephard). 



CEcistes wilsonii Anderson and Shephard, Proc. Royal Soc. Victoria, n. ser., vol. 4, 

 1892, p. 72, pi. 13, fig. 3. 



Doubtful species: 



(Ecistes syriacus Barrois and Daday, Matli. Term. lEIrt., vol. 12, 1894, p. 225, pi. 7, 

 figs. 15, 17. 



RATULUS Bory de St. Vincent. 



Ratulus Bory de St. Vincent, Class. Anim. Micr., 1826, p. 59. 



Type (by present designation). — Ratulus lunaris (Mulier)= Trichoda lunaris Miiller. 

 All the species are unrecognizable. 



Ratulus clavus (Muller). 



Trichoda clavus Muller, Anim. Infus., 1786, p. 208, pi. 29, figs. 16-18. 



Rattulus clavus Lamarck, Hist. Nat. Anim. sans Vert., vol. 2, 1816, p. 24. 



Ratulus cercarioides Bory de St. Vincent, Class Anim. Micr., 1826, p. 59. 

 Ratulus delphis (Muller). 



Trichoda delphis Muller, Anim. Infus., 1786, p. 201, pi. 30, figs. 8, 9. 



Ratulus delphis Bory de St. Vincent, Enc. Meth., Zooph. (pt. 2), 1827, p. 667. 

 Ratulus lunaris (Muller). 



Trichoda lunaris Muller, Anim. Infus., 1786, p. 204, pi. 29, figs. 1-3. 



Ratulus lunaris Bory de St. Vincent, Class. Anim. Micr., 1826, p. 59. 



Rattulus lunaris Ehrenberg, Abh. Akad. Wiss. Berlin, 1830, p. 47. 



Cercaria lunaris Lamarck, Hist. Nat. Anim. sans Vert., ed. 2, vol. 1, 1835, p. 431. 



Mastigocerca lunaris Weisse, Bull. Phys.-Math. Acad. Sci. St. Petersburg, vol. 5, 

 1846, p. 227, figs. 4-6. 

 Ratulus lynceus (Muller). 



Trichoda lynceus Muller, Anim. Infus., 1786, p. 225, pi. 32, figs. 1, 2. 



Ratulus lynceus Bory de St. Vincent, Enc. M6th., Zooph. (pt. 2), 1827, p. 668. 

 Ratulus mus Bory de St. Vincent. 



Ratulus mus Bory de St. Vincent, Class. Anim. Micr., 1826, p. 60. 

 Ratulus musculus (Muller). 



Trichoda musculus Mxjller, Anim. Infus., 1786, p. 210, pi. 30, figs. 5-7. 



Vaginaria musculus Schrank, Fauna Boica, vol. 3, pt. 2, 1803, p. 144. 



Ratulus musculus Bory de St. Vincent, Class. Anim. Micr., 1826, p. 60. 



Genus RHINOGLENA Ehrenberg. 



Rhinoglena Ehrenberg, Monatsber. Akad. Wiss. Berlin, 1853, pp. 190, 193=i?Ainops 

 Hudson, Ann. Mag. Nat. Hist., ser. 4, vol. 3, 1869, p. 27. 

 Type (monotype). — Rhinoglena frontalis Ehrenberg. 



RHINOGLENA FRONTALIS Ehrenberg. 



Diglena {Rhinoglena) frontalis Ehrenberg, Monatsber. Akad. Wiss. Berlin, 1853, 



pp. 190, 193. 

 Rhinops vitrea Hudson, Ann. Mag. Nat. Hist., ser. 4, vol. 3, 1869, p. 27, pi. 2. Type 

 (monotype) of genus Rhinops Hudson, 1869. 



RHOPALOSOMA Voigt. 



Rhopalosoma Voigt, Zool. Anz., vol. 25, 1902, p. 678; not Rhopalosoma Cresson, 1865, 

 Hymenoptera. 



