SYNOPSIS OP THE EOTATORIA. 89 



Genus PTYGURA Ehrenberg. 



Ptygura Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831), 1832, p. 122. 

 Type (monotype). — Ptygura melicerta Ehrenberg. 



PTYGURA BRACHIATA (Hudson). 



CEdstes hrachiatus Hudson, Hudson and Gosse, Rotifera, 1886, vol. 1, p. 83, pi 9 

 fig. 2. 



PTYGURA BREVIS (Rousselet). 



CEdstes brevis Rousselet, Journ. Royal Micr. Soc, 1893, p. 448, pi. 7, fig. 4. {CEdstea 

 brevis Hood, Journ. Royal Micr. Soc, 1893, p. 281: nomen nudum.) 



PTYGURA CRYSTALLINA (Ehrenberg). 



(Edstes crystallinus Ehrenberg, Abh. Akad. Wiss. Berlin (for 1833), 1834, p. 223. 



Type (monotype) of genus CEdstes Ehrenberg, 1834. 

 CEdstes hyalinus Ehrenberg, Infusionsth., 1838, pi. 43, fig. 7. 

 Ptygura crystallina Dujardin, Hist. Nat. Zooph., 1841, p. 616. 

 Melicerta crystallina Gosse, Pop. Sci. Rev., vol. 1, 1862, p. 490. 



PTYGURA INTERMEDIA (Dav is). 



CEdstes intermedins Davis, Trans. Royal Micr. Soc, vol. 15, 1867, p. 14, pi, 1, figa. 1-4. 



PTYGURA LONGICORNIS (Davis). 



CEdstes longicornis Davis, Trans. Royal Micr. Soc, vol. 15, 1867, p. 14, pi. 1, figs. 5-8. 



PTYGURA LONGIPES (Wills). 



(Edstes longipes Wills, Midland Natural., vol. 1, 1878, p. 317, pi. 5, figs. 1,2. 

 CEdstes umbella Hudson, Journ. Royal Micr. Soc, 1879, p. 1, pi. 1. 



PTYGURA MELICERTA (Ehrenberg). 



Ptygura melicerta Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831), 1832, p. 122. 

 (Edstes serpentinus Gosse, Hudson and Gosse, Rotifera, 1886, vol. 1, p. 80, pi. 9, fig. 1. 

 (Edstes ptygura Hudson and Gosse, Rotifera, 1886, vol. 2, p. 134. 

 Cephalosiphon/urdllatus Kellicott, Proc Amer. Soc. Micr., vol. 11, 1889, p. 32, fig. 

 CEdstes melicerta Jennings, Bull. U. S. Fish Comm., vol. 19 (for 1899), 1900, p. 76. 



PTYGURA MUCICOLA (Kellicott). 

 CEdstes mudcola Kellicott, Proc. Amer. Soc. Micr., vol. 10, 1888, p. 88, fig, 



PTYGURA PILULA (Cubitt). 



Melicerta pilula Cubitt, Monthly Micr. Journ., vol. 8, 1872, p. 5, pi. 24, figs, 2-4, 

 ? Melicerta sodalis Collins, Sci. Goss., 1872, p. 9, fig. 

 (Edstes pilula Wills, Midland Natural., vol. 1, 1878, p. 202. 



PTYGURA SOCLALIS (Weber). 



CEdstes sodalis Weber, Arch. Biol., Liege, vol. 8, 1888, p. 655, pi. 28, figs. 1-4. 



PTYGURA STEPHANION (Anderson). 



(Edstes stephanion Anderson, Journ. Asiatic Soc. Bengal, vol. 58, pt. 2, 1889, p. 347, 



pi. 20, fig. 2. 



PTYGURA STYGIS (Gosse). 



CEdstes stygis Gosse, Hudson and Gosse, Rotifera, 1886, vol. 1, p. 85, pi. 9, fig. 3. 



