Giascorr—A. List of some of the Rotifera of Ireland. 43 
Notops (?) quadrangularis, sp. nov. 
[ Pl. IIT. fig. 3.] 
Sp. Ch.—Body quadrangular; head narrow; foot long and 
non-retractile ; toes nearly as long as the foot, furcate. 
Approaching JV. brachionus this species still bears too many 
distinctive characteristics to be confounded with it, the much 
narrower head, the high shoulders, straight sides of the body, and 
comparatively long toes being subject to no variation in the many 
examples which occurred. At the four corners of the trunk 
there are dark gray or brown patches seemingly spread out upon 
the ventral floor which, under a high power, appear to be globu- 
lated, foliaceous expansions, such as we see in Pterodina. ‘The 
truncate head is simple, and bears no styligerous prominences. A 
single large red eye is situated close to the frontal margin. The 
large forcipate (?) trophi reach deep into the neck, from the pos- 
terior end of which spreads an ample stomach, with wide, flat ovary 
underneath. The foot is long, round, and non-retractile, the 
pointed toes being almost of equal length. Length about 5th of 
an inch. 
Not unfrequent. 
Habitat.—Ponds and streams, Cos. Wexford and Waterford. 
Taphrocampa annulosa, Gosse. 
[The Rotifera, vol. ii. p. 16, Pl. XVII. fig. 12.] 
Very common. I have seen it as described and figured in 
Pl. xvi. fig. 12, of the Monograph, but far more frequently the 
body presented a depressed and collapsed appearance, with a deep 
broad groove along the dorsal line, the annular ridges conspicuously 
raised, and the lateral depressions (Pl. xvi. fig. 120) deeply marked. 
The sedimentous deposit adhering to the surface of the integu- 
ment denoted that this appearance was a reality, and not due to an 
optical delusion. The black brain mass was always conspicuous, 
but no red eye occurred. The auricles were frequently everted, 
especially when the animal swam inthe open. ‘The foot, if rightly 
so called, was mostly crescent-shaped, and in all cases appeared to 
