74 BULLETIN 81^ UNITED STATES NATIONAL MUSEUM. 



MONOSTYLA QUADRIDENTATA Ehrenberg. 



Monostyla quadridentata Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831), 1832, p. 130. 

 Lepadella cornuta Schmarda, Neue Wirbell. Thiere, 1859, vol. 1, p. 58, pi. 14, fig, 



122; not Lepadella cornuta (Mtiller) of Bory de St. Vincent, 1826. 

 Metopidia cornuta Hudson and Gosse, Rotifera, Suppl., 1889, p. 47, pi. 34, fig. 3. 

 Monostyla bicornis Daday, Math. Term. Ert., vol. 15, 1897, p. 139, text fig. 



Doubtful or insufficiently described species : 



Monostyla diophthalma Iroso, Hon. Zool. Italiano, vol. 21, 1910, p. 303. 



Monostyla lordiiGossE, Hudson and Gosse, Rotifera, 1886, vol. 2, p. 99, pi. 25, fig. 5. 



Monostyla macrognatha Schmarda, Neue Wirbell. Thiere, 1859, vol. 1, p. 59, pi. 14, 



fig. 124. 

 Monostyla oophthalma Schmarda, Neue Wirbell. Thiere, 1859, vol. 1, p. 59, pi. 14, 



fig. 126. 

 Monostyla ovata Forbes, Bull. U. S. Fish Comm., vol. 11 (for 1891), 1893, p. 256. 

 Monostyla pyriformis Daday, Math. Term. Ert., vol. 23, 1905, p. 330. 

 Monostyla tentaculata Cosmovici, Naturaliste (Paris), vol. 14, 1892, p. 70; Anal. Acad. 



Rom., ser. 2, vol. 28, 1906, p. 44, fig. 29; probably a Lepadella. 



MYTILIA Gosse. 



Mytilia Gosse, Hudson and Gosse, Rotifera, 1886, vol. 2, p. 110; not Mytilia Gray, 

 1858, Reptilia. According to v. Hofsten, Zool. Bidr. Uppsala, vol. 1, 1912, pp. 

 187-190, all the species are synonymous with Pleurotrocha reinhardti (Ehrenberg). 



Genus MYTILINA Bory de St. Vincent. 



Mytilina Bory de St. Vincent, Class. Anim. Micr., 1826, p. 87= Mitillina Bory de 

 St. Vincent, Diet. Class. Hist. Nat., vol. 2, 1822, p. 470; no BT[>ecieB= Salpina 

 Ehrenberg, Abh. Akad. Wiss. Berlin, 1830, p. 46; not Mytilina Cantraine, 1837, 

 Mollusca. 

 Type (by designation of v. Hofsten, Ark. Zool., Stockholm, vol. 6, No. 1, 1909, 

 p. 54). — Mytilina mucronata (Miiller) as cypridina Bory de St. Ymcent=BrachiomLS 

 mucronatus Miiller. 



MYTILINA BICARINATA (Perty). 



Euchlanis bicarinata Perty, Mitth. Nat. Ges. Bern, 1850, p. 19. 



Salpina bicarinata Dixon-Nuttall, Journ. Royal Micr. Soc. , 1893, p. 630, figs. 89a, 90a. 



Salpina pertyi Hood, Proc. Royal Irish Acad., ser. 3, vol. 3, 1895, p. 687. 



Diplax videns longipes Voronkov, Trudy Otd. Ikht. Obshch. Aklim., vol. 6, 1907, 



p. 107, pi. 7, fig. 32. 

 Mytilina pertyi Sachse, Siisswasserfauna Deutschlands, pt. 14, 1912, p. 160, text fig. 



MYTILINA COMPRESSA (Gosse). 



Diplax compressa Gosse, Ann. Mag. Nat. Hist., ser. 2, vol. 8, 1851, p. 201. 



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



MYTILINA MACROCERA (Jennings). 



Salpina macrocera Jennings, Bull. Michigan Fish Comm., No. 3, 1894, p. 22, figs. 12, 13. 



MYTILINA MUCRONATA (MUller). 



Brachionus mucronatus MiJLLER, Verm. Terr. Fluv., vol. 1, pt. 1, 1773, p. 134. 

 Brachionus dentatus Miiller, Anim. Infus., 1786, p. 348, pi. 49, figs. 10, 11. 

 Mytilina cypridina Bory de St. Vincent, Class. Anim. Micr., 1826, p. 81 = Brachionus 

 mucronatus Miiller renamed. 



