76 BULLETIN 81, UNITED STATES NATIONAL MUSEUM. 



Unrecognizable: 



Mytilina tripos (Muller). 



Brachionus tripos Muller, Verm. Terr. Fluv., vol. 1, pt. 1, 1773, p. 133, 

 Mytilijia limnadina Bory de St. Vincent, Class. Anim. Micr., 1826, p. 87=Brach{- 

 oniis tripos renamed. 



Insufficiently described : 



Diplax unguipes Lucks, Siisswasserfauna Deutschlands, pt. 14, 1912, p. 154, text fig. 



NOROPS Ehrenberg. 



Norops Ehrenberg, Abh. Akad. Wiss. Berlin, 1830, p. 47, not Norops Wagler, 1830, 

 Keptilia. 



This name was withdrawn by Ehrenberg, Infusionsth., 1838, 

 p. 451, and TriopJithalmus substituted for it. Whether Wagler's 

 name really has priority can not be decided from Ehrenberg's state- 

 ment. In Isis (Oken), vol. 24, 1831, November issue, col. 1250- 

 1254, Wagler's Natiirliches System der Amphibien is reviewed, anp 

 probably was not very old then. As far as the Rotatoria are con- 

 cerned, the question is of no great importance, as Ehrenberg's 

 Norops dorsalis has not been refound, and possibly would prove to 

 be a synonym of an Eosphora species. 



Genus NOTHOLCA Gosse. 



Notholca Gosse, Hudson and Gosse, Rotifera, 1886, vol. 2, p. 125. 



Type (by present designation). — Notholca striata (Muller) as scapha Gosse= 

 Brachionus striatus Miiller. 



NOTHOLCA BOSTONIENSIS Rousselet. 



Notholca bostoniensis Rousselet, Journ. Quekett Micr. Club, ser. 2, vol. 10, 1908, p. 

 337, pi. 26, figs. 1-3; pi. 27, fig, 4. 



NOTHOLCA FOLLACEA (Ehrenberg). 



Anurxa foliacea Ehrenberg, Infusionsth., 1838, p. 507, pi. 62, fig. 10. 

 Anurxa heptodon Perty, Mitth. Nat. Ges. Bern, 1850, p. 21. 

 ? Anitrsea schista Gosse, Journ. Royal Micr. Soc, 1887, p. 871, pi. 15, fig. 23. 

 Notholca foUacea Hudson and Gosse, Rotifera, Suppl., 1889, p. 56, pi. 34, fig. 35. 

 Notholca heptodon Hudson and Gosse, Rotifera, Suppl., 1889, p. 56, pi. 34, fig. 34. 

 Notholca ambigua Bergendal, Acta Univ. Lundensis, vol. 28, 1892, sect. 2, No. 4, 

 p. 128, pi. 4, fig. 24. 



NOTHOLCA LONGISPINA (Kellicott). 



Anurxa longispina Kellicott, Amer. Journ. Micr. Pop. Sci., vol. 4, 1879, p. 19, fig. 



Anursea spinosa Imhof, Zool. Anz., vol. 6, 1883, p. 470, fig. 2. 



Notholca longispina Hudson and Gosse, Rotifera, 1886, vol. 2, p. 125, pi. 28, fig. 6. 



NOTHOLCA STRIATA (MUUer). 



Brachionus striatus Muller, Anim. Infus., 1786, p. 332, pi. 47, figs. 1-3. 

 Anourella striata Bory de St. Vincent, Diet. Class. Hist. Nat., vol. 2, 1822, p. 470. 

 Anourella lyra Bory de St. Vincent, Class. Anim. Micr., 1826, p. 91=Brachionus 

 striatus Miiller renamed. 



