34 Scientific Proceedings, Royal Dublin Society. 
@cistes erystallinus, Ehrenberg. 
[The Rotifera, vol. i. p. 80, Pl. VII. fig 3.] 
A very common species. JI have met with large colonies 
embedded in the gelatinous balls of Gloiotrichia which infests some 
water-plants; also single specimens in various situations. When 
they adopt the Gloiotrichia for their dwelling-place the tube is 
simply continued from the surface of the plant to protect the upper 
portion of the animal. It is of loose, gray, fluffy texture, and very 
unsymmetric in shape. 
Habitat.— Bogs and ponds, Cos. Wexford and Waterford. 
@cistes longicornis, Davis. 
[The Rotifera, vol. i. p. 82, Pl. VII. fig. 6. ] 
The tube of this species was much more compactly built than 
that given in the description in the Monograph. It was smooth, 
cylindric, and tapered towards the base, which was attached to a 
leaflet of Utricularia vulgaris. The body of the animal was half the 
length and size of the tube, and supported by a slender foot. The 
antenne were very long, with a small joint at the tip, and spread 
widely apart; the coronal disc was small and almost circular, with a 
wide ventral gap; there were two long, oval eggs placed end to end 
in the lower half of the tube, which were but dimly discernible 
through the semi-opaque wall, which was of an orange colour. The 
creature was extremely timid, and retreated within the tube upon 
the slightest alarm. 
Habitat.—A. marsh drain, Co. Wexford. 
@Ecistes brachiatus, Hudson. 
[The Rotifera, vol. i. p. 83, Pl. IX. fig. 2.] 
Three of this well-marked species occurred, two among fila- 
ments, and one attached to a moss leaf. The dark branching ribs, 
which spread over the walls of the coronal cup, give it a very 
distinctive appearance. 
Habitat.—A pond, Co. Wexford. 
