Harring and Myers—The Rotifers of Wisconsin. 
565 
figured (etc.) species”. It seems therefore that both rules and 
established usage are being obeyed in accepting the name Notom- 
mata copeus. 
NOTOM MATA PACHYURA (GrOSSe) 
Plate XLII, figures 1, 2; Plate XLIII, figures 1-5 
? Notommata ansata Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831) 
1832: 131; Infusionsth. (1838), p. 430, PI. 52, fig. 5. 
Copeus pacTiyurus Gosse, Hudson and Gosse, Rotifera (1886) 2: 31, 
PL 16, fig. 4.— Dixon-Nuttall, Jour. Quekett Micr. Club II, 5 
(1894): 3i3i3, PL 15, figs. 1, 2.— Skorikov, Trav. Soc. Nat. Kharkow, 
30 (1896): ,288.— Weber, Rev. Suisse Zool., 5 (1898): 458, PL 18, 
figs. 11, 12.— Stenroos, Acta Soc. Fauna et Flora Fennica 17 1 
(1898): 129.— Lie-Pettersen, Bergens Mus. Aarbog (for 1909) 
1010 15 : 42.— Voigt, Siisswasserfauna Deutschlands, pt. 14 (1912): 
94, fig. 170.— Mola, Ann. Biol. Lac. 6 (1913): 242.— Montet, Rev. 
Suisse Zool. 23 (1915): 321. 
Copeus quinquelobatus Stokes, Jour. Royal Micr. Soc. 1896: 277, PL 6, 
figs. 10, 11. 
Copeus triangulatus Kirkman, Jour. Royal Micr. Soc. 1906: 264, PL 12, 
figs. 1, 2. 
Notommata brachiata Daday, Math. Term. Ert. 26 (1908): 31, text fig.; 
Zoologica 59 (1910): 67, fig. 2, PL 3, figs. 18, 19. 
Notommata (Copeus) quinquelobatus de Beauchamp, Arch. Zool. Exp. 
IV, 10 (1909): 86. 
Notommata pachyura Harring, U. S. Natl. Mus. Bull. 81 (1913): 79; 
Proc. U. S. Natl. Mus. 46 (1913): ,392.— Weber and Montet, Cat. 
Invert. Suisse, fasc. 11 (1918): 109. 
The body of this species is spindle-shaped, rather short, stout, 
and gibbous posteriorly; its greatest width is more than one third 
of the total length. The integument is leathery and the outline 
quite constant. It is a moderately transparent animal. 
The head segment is very small; its width is very nearly equal 
to the length, about one third of the greatest width of the body. 
The neck is relatively long, one sixth of the total length, and in¬ 
creases rapidly in width towards the abdomen. The anterior 
transverse folds are well marked. The abdomen is fusiform, 
gibbous dorsally and rounded posteriorly. The tail is very large 
and projects dorsally far above the first foot joint; it has only a 
single lobe. The foot has two short, ^ery broad joints; at the 
base of the toes the terminal joint has a small, dorsally projecting, 
knob-like spur; apparently it does not have any setae. The toes 
