SYNOPSIS OF THE ROTATORIA. 67 



In spite of a rather careful search, it has not been possible to locate 

 the original description. Judging from Ehrenberg, it probably 

 would not prove of any great value. 



Genus MACROCH^^TUS Perty. 



Macrochsetus Perty, Mitth. Nat. Ges. Bern, 1850, p. 22=Polychxtus Perty, Zur 

 Kenntn. kleinst. Lebensf., 1852, p. 45. 

 Type (monotype). — Macrochsetus subquadratus Perty. 



MACROCH^TUS COLLINSU (Gosse). 



Dinocharis collinsii Gosse, Int. Obs., vol. 10, 1867, p. 269, fig. 



Polychsetus spinulosus Archer, Quart. Journ. Micr. Sci., vol. 8, 1868, p. 72. 



Polychsetus collinsii Ternetz, Rot. Umg. Basels, 1892, pp. 15, 31, pi. 1, fig. 7. 



MACROCH^TUS SERICA (Thorpe). 



Dinocharis serica Thorpe, Journ. Royal Micr. Soc, 1893, p. 152, pi. 2, fig. 4. 

 Polychxtus serica Jennings, Bull. U. S. Fish Comm., vol. 19 (for 1899), 1900, p. 89. 



MACROCHSETUS SUBQUADRATUS Perty. 



Macrochsetus subquadratus Perty, Mitth. Nat. Ges. Bern, 1850, p. 22. 



Polychxtus subquadratus Perty, Zur Kenntn. kleinst. Lebensf., 1852, p. 45, pi. 1, 



fig. 6. Type (monotype) of genus Polychxtus Perty, 1852. 

 Dinocharis subquadratus rossica Michailoff, Trav. Soc. Nat. St. Petersburg, vol. 31, 



1900, p. 153. 

 Dinocharis subquadratus Daday, Zoologica, Heft 44, 1905, p. 103, pi. 7, fig. 18. 



Genus MACROTRACHELA Milne. 



Macrotrachela Milne, Proc. Philos. Soc. Glasgow, vol. 17, 1886, p. 134. 

 Type (by present designation). — Macrotrachela aculeata Milne. 



MACROTRACHELA ACULEATA Milne. 



Macrotrachela aculeata Milne, Proc. Philos. Soc. Glasgow, vol. 17, 1886, p. 138, pi. 1, 



fig. 6. 

 Callidina aculeata Hudson and Gosse, Rotifera, Suppl., 1889, p. 11, pi. 32, fig. 11. 



MACROTRACHELA ALLANI (Murray). 



Callidina allani Murray, Journ. Royal Micr. Soc, 1911, p. 6, pi. 1, fig. 2. 



MACROTRACHELA ANGUSTA (Bryce). 



Callidina angusta Bryce, Journ. Quekett Micr. Club, ser. 2, vol. 5, 1894, p. 451, pi. 24, 



fig. 6. 



MACROTRACHELA ARMILLATA (Murray). 



Callidina armillata Murray, Journ. Royal Micr. Soc, 1911, p. 168, pi. 4, fig. 2. 



MACROTRACHELA ASPERULA (Murray). 



Callidina asperula Murray, Journ. Royal Micr. Soc, 1911, p. 289, pi. 8, fig. 11. 

 MACROTRACHELA BRANCHICOLA (Nemec). 



Callidina branchicola Nemec, Sitzungsber. Bohm. Ges. Wiss. Prag, 1895, No. 32, p. 9, 

 figs. 26-30. 



