44 Scientifie Proceedings, Royal Dublin Society. 
be but a furcate projection of the ventral integument, and incapable 
of independent movement, the rounded lobe in the middle of the 
erescentic fork being situated distinctly above it, and hence to be 
regarded as a true tail; this was especially evident on one occasion, 
as the creature curled itself round a slender stem, when the 
crescent was bent underneath, leaving the tail projecting above 
ite 
Habitat.—All fresh waters, Cos. Wexford, Waterford, and 
Kerry. 
Taphrocampa Saundersiz, Gosse. 
[The Rotifera, vol. 11. p. 18, Pl. XVII. fiz. 11.] 
I had but a moment’s glimpse of this species as it hurried into 
cover, but the ridged annulations of the body, the lumpish head, 
narrow neck, and the shape of the toes sufficiently proved its 
identity. 
Habitat.—A stream, Co. Wexford. 
Pleurotrocha gibba (?), Ehrenberg. 
[The Rotifera, vol. ii. p. 20, Pl. XVIII. fig. 5. ] 
This is undoubtedly the species figured by Mr. Gosse. The 
large head curving to the oblique disc, the short body, the single 
foot-joint stout, but distinct ; toes a trifle longer than the foot: 
all coincide so as to render its identity indisputable; its manners 
were slow, as it persistently grubbed amongst the flocose. 
Habitat.—A. stream, Co. Waterford. 
Notommata aurita, Ehrenberg. 
[The Rotifera, vol. i. p. 21, Pl. XVII. fig. 6.] 
Common. 
Habitat.—Stream, ponds, Cos. Waterford and Wexford. 
Notommata ansata, Hhrenberg. 
[The Rotifera, vol. ii. p. 21, Pl. XVII. fig. 3.] 
The great rapidity of movement in this species renders it a 
difficult one to study. I could not detect the eye; but the brain, 
though clear, was well defined. The contents of the stomach were 
not of the dark red colour represented in the above figure, but of a 
