Guiascott—A List of some of the Rotifera of Ireland. 63. 
Distemma raptor, Gosse. 
[The Rotifera, vol. ii. p. 54, Pl. XIX. fig. 1.] 
One fine specimen from a pool which had been formerly 
exposed to the tide of the river Suir, Co. Waterford. 
Distemma platyceps (?), Gosse. 
(The Rotifera, Pl. XXXI. fig. 25, of “ Supplement.” | 
[Pl. V. fig. 4. ] 
Though I could see no eyes, this species seems to correspond 
closely with the description of the above. The head is very broad, 
. truncate, or even slightly crescentic on the frontal margin, from 
the centre of which a slender finger-like process was occasionally 
thrust out, but rapidly retracted again; besides this, there were 
one ventral and two lateral projections from the face, somewhat 
similar to what we find in D. raptor. The trophi are large and 
pear-shaped ; the semicircular rami always held open, and some- 
times thrust out with rapid motion to the very hilt, snapped, and 
withdrawn. Below the mastax, at either side, is a small globose 
bundle of black granules, presumably the gastric glands. This 
unusual black-spotted appearance of these organs was notable in 
the three examples which occurred. 
The rest of the body was identical with Mr. Gosse’s species, 
the enormous contractile vesicle forming a very prominent feature. 
I give a sketch of the species for comparison with the above- 
mentioned figure in the “Supplement.” 
Habitat.—A. marsh drain, Co. Wexford. 
LORICATE DIVISION. 
Mastigocerea scipio, Gosse. 
{The Rotifera, vol. 11. p. 61, Pl. XX. fig. 11.] 
A dead specimen, among the branches of Utricularia from a. 
drain; also a living specimen from a bog. 
Rare. Co. Wexford. 
Mastigocerea rattus (Ehrenberg). 
[The Rotifera, vol. i. p. 62, Pl. XX. fig. 9.] 
Habitat.—Very common in pond, bog, and stream, Cos. 
Waterford and Wexford. 
