70 BULLETIN 81^ UNITED STATES NATIONAL MUSEUM. 



MACROTRACHELA PUNCTATA (Murray). 



Callidina punctata Murray, Journ. Royal Micr. Soc, 1911, p. 5, pi. 2, fig. 11. 



MACROTRACHELA QUADRICORNIFERA Milne. 



Macrotrachcla quadricornifera Milne, Proc. Philos. Soc. Glasgow, vol. 17, 1886, p. 139, 



pi. 1, fig. 4. 

 Callidina quadricornifera Hudson and Gosse, Rotifera, Suppl., 1889, p. 10. 



MACROTRACHELA SERRULATA (Murray). 



Callidina serrulata Murray, Journ. Royal Micr. Soc, 1911, p. 170, pi, 5, fig. 7. 



MACROTRACHELA SPECIOSA (Murray). 

 Callidina spedosa Murray, Amer. Natural., vol. 41, 1907, p. 100, figs. 8-10. 



MACROTRACHELA VESICULARIS (Murray). 



Callidina vesicularis Murray, Journ. Quekett Micr. Club, ser. 2, vol. 9, 1906, p. 259, 

 pi. 18. 



Insufficiently described : 



Macrotrachcla bidens Milne, Proc. Philos. Soc. Glasgow, vol. 17, 1886, p. 138. 



MALACOSTOMUM Werneck. 



Malacostomum Werneck, Monatsber. Akad. Wiss. Berlin, 1841, p. 377; no speciea 

 named. 



Genus MICROCODON Ehrenberg. 



Microcodon Ehrenberg, Abh. Akad. Wiss. Berlin, ^830, p. 45. 

 Type (monotype). — Microcodon clavus Ehrenberg. 



MICROCODON CLAVUS Ehrenberg. 

 Microcodon clavus Ehrenberg, Abh. Akad. Wiss. Berlin, 1830, p. 45. 



MICRODINA Murray. 



Microdina Murray, Trans. Royal Soc. Edinburgh, vol. 41, 1905, p. 371; not Microdina 

 Kirby, 1903, Orthoptera. 



Genus MIKROCODIDES Bergendal. 



Mihrocodides Bergendal, Acta Univ. Lundensis, vol. 28, 1892, sect. 2, No. 4, p. 34. 



Type (monotype). — Mikrocodides chlasna (Gosse) as dubius Bergendal= Stephanops 



chlsena Gosse. 



MIKROCODIDES CHL.S;NA (Gosse). 



Stephanops chlsena Gosse, Hudson and Gosse, Rotifera, 1886, vol. 2, p. 76, pi. 21, 



fig. 9. 

 Rhinops orbiculodiscus Thorpe, Journ. Royal Micr. Soc, 1891, p. 304, pi. 7, fig. 4. 

 Mikrocodides dubius Bergendal, Acta Univ. Lvmdensis, vol. 28, 1892, sect. 2, No. 4, 



p. 34, pi. 1, figs. 8, 10, 11. 

 Microcodides orbiculodiscus Jennings, Bull. Michigan Fish Comm., No. 3, 1894, p. 8. 

 Microcodides chlxna Weber, Rev. Suisse Zool., vol. 5, 1898, p. 369, pi. 16, figs. 5, 6. 



MIKROCODIDES DOLIARIS (Rousselet). 



Microcodides doliaris Rousselet, Journ. Quekett Micr. Club, ser. 2, vol. 6, 1895, p. 120, 

 pi. 7, fig. 4. 



