466 Wisconsin Academy of Sciences^ Arts, and Letters. 
p. 106, fig. 199.— Mola, Ann. Biol. Lae., vol. 6, 1913, p. 246.— ^Montet, 
Eev. Suisse Zool., vol. 23, 1915, p. 329.— Jakubski, Eozpr. Wind. Muz. 
Dzieduszyckicli, vol. 1, No, 3-4, 1915, p. 19.— ^Whitney, Journ. Exper. 
Zool., vol. 20, 1916, p. 274, figs. 4, 5. 
? Leiodina capitata Moreen, Ann. Sci. Nat., vol. 21, 1830, p, 124, pi, 3, 
fig. 2; Bijdr. Natuurk. Wetensch., vol. 5, 1830, p. 211, fig. 
Furcularia catellina Blainville, Diet. Sei. Nat., vol. 60, 1830, p. 152. 
Typhlina furca Ehrenberg, in Hemprieh and Ehrenberg, Symb. Phys. Anim, 
Evert., 1831 (1832?), pi. 1, figs. 17 b, 2, 3; not Cercaria furca Muller. 
Flagiognatha catellina Dujardin, Hist. Nat. Zooph., Inf., 1841, p. 652. 
Flagiognatha hyptopus Dujardin, Hist. Nat. Zooph., Inf., 1841, p. 653, pi. 
21, fig. 8; not Notommata hyptopus Ehrenberg. 
Diglena granularis Weisse, Bull. Phys.-Math. Aead. St. Petersburg, vol. 8, 
1849, eol. 300. 
f Heterognathus diglenus Schmarda, Neue wirbellose Thiere, vol. 1, 1859, 
p. 52, pi. 12, fig. 107. 
F Notops forcipita Glasscott, Proe. Eoyal Dublin Soe., new ser., vol. 8, 
1893, p. 79, pi. 6, fig. 5. 
? Froales algicola Kellicott, Trans. Amer. Mier. Soe., vol. 19, 1897, p. 48. 
F Biaschiza tenuior Murray, Brit. Antaretie Exped. 1907-9. Eep. Sei. Inv., 
vol. 1, 1910, p. 57, pi. 13, fig. 16. 
F Diglena volvocicola Zavadovski, IJehen. Zap. Moskovsk. Gor. Univ. Shan- 
iavskago, vol. 1, 1916, p. 246, pi. 3, text figs. 1-19. 
F Diglena catellina parasitica Zavadovski, Uchen. Zap. Moskovsk. Gor. TJniv. 
Shaniavskago, vol. 1, pt. 2, 1916, App., p. 4. 
Diaschiza catellina Weber and Montet, Cat. Invert. Suisse, pt. 11, 1918, 
p. 143. 
The body is short, stout and strongly gibbous dorsally. The head 
is very large and oblique anteriorly. The neck is not very strongly 
marked. The abdomen is strongly compressed laterally; the ventral 
edge is nearly straight, the dorsal gently curved for about two 
thirds of its length and the posterior third rounded. The lorica is 
rather flexible, and the plates somewhat indistinct; the lateral 
clefts are wide and parallel-sided. The small, short foot is wholly 
ventral and the posterior portion of the abdomen projects over 
and beyond it as a huge tail. The toes are short, almost straight 
and taper gradually to acute points; when closely appressed to the 
body, they project very little beyond the tail; their length is about 
one fifth of the total length. 
The corona is very strongly oblique and distinctly convex with¬ 
out projecting lips. 
The mastax is very large and the trophi of the normal type; 
the fulcrum is very long and slightly expanded at the posterior 
end; the manubria are rodshaped and decurved, ending in a semi¬ 
circular, dorsal expansion. 
