90 THE ROTIFERA. - 
T found this large and beautiful new Huchlanis, in June 1885, in water sent to me 
by Mr. Thos. Bolton, from Sutton Park, Birmingham. It can be easily recognized by 
its long oval dorsal plate, which has not a trace of a notch behind, and by the curiously 
rounded end of the flange of its ventral plate, which, unlike that of any other Huchlanis, 
is widest at the hind end, and elliptical there in outline. As in H. dilatata and 
E. macrura, the dorsal plate is membranous near the head. The creature is very trans- 
parent, and it has a way of jerking its toes apart and then keeping them open, which is 
very characteristic. It has unusually large foot-glands, and shows the adhesive nature 
of their secretion by slowly twirling round, first on one toe and then on the other, for 
several minutes at a time. From the ventral surface it is easy to see the structure of 
the corona. It is truncate, and gouged out, as it were, above the buccal orifice, some- 
what in the fashion of Hydatina senta (Pl. xiv. fig.1c). A fringe of small cilia surrounds 
its outer and inner edges, and on the face of the corona itself are curves of larger cilia, 
whose ground plan is shown in black lines in Pl. C. fig. 10. Two papille rise from the 
same surface, very visible on a dorsal view, which seem to be tubular, but in which I 
have never detected anything like a tactile organ. Dr. Plate! figures the similar organs 
in E. dilatata with a trivadiate passage down their length. He says that they are 
covered with a very delicate membrane, and suggests that they serve for respiration. 
The trophi are sub-malleate with five teeth in each uncus. The stomach is tied on 
either side by muscles, which are attached to the border of the lorica at one end and to 
the middle of the alimentary canal at the other. From these latter points muscular 
fibres pass diagonally upwards along the surface of the stomach, and by their perpetual 
contractions throw it into ever-varying folds ; while at the same time the lateral muscles 
twitch the stomach from one side to the other. Yellow oil-globules, often prettily 
arranged in quincunx fashion, are imbedded in the thick stomach-walls; and in the 
intestine, which is usually most obvious, the furious motion of its lining cilia can be seen 
with ease. The gastric glands are curiously lobed on the ventral side (fig. 1a) and 
contain large nucleated cells. The foot-glands are very long, club-shaped, and bent 
over almost to the edge of the lorica; they are continued down the short three-jointed 
foot, and end in each toe in what appear to be three very delicate, adhering, quill-shaped 
vessels (fig. 1b), with their pointed ends near the toe’s extremity. The toes are two 
short, stout, sword-like blades; and, so far as I could see, without sete. The vascular 
system is conspicuous. Two intertwined lateral canals, hanging in bold loops just on 
a level with the mastax, and at the summits of the foot-glands, run down each side of 
the lorica to a large and normally placed contractile vesicle. I have seen four vibratile 
tags on each side: one close to the head, one at the upper loop, another at the lower, 
and one midway between them; doubtless there is a fifth. The ovary is a large 
cushion-like mass stretching across the venter with unusually large germs: fig. la shows 
a maturing ovum. The nervous ganglion (fig. 1) is very large, with nearly parallel 
sides, a scalloped front edge, and a rounded hind end, which is distinctly cellular. It 
stretches far below the mastax, in front of which, on its inner surface, it bears a dark- 
red eye. Two small setigerous pimples rise from the corona behind the tubular papille 
mentioned above. On the neck is another setigerous eminence, the dorsal antenna. I © 
have not succeeded in finding any dorso-lateral antenne. There are two pairs of 
longitudinal muscles for withdrawing the head, which are plainly striated ; the rest of the 
muscular system is very similar to that already described (i. p. 8) in Brachionus rubens. 
Length, ;!|; inch. Habitat. A pond in Sutton Park (C.T.H.): rare. 
KE. pivatata, Hhrenberg. 
(Pl. XXIII. fig. 5.) 
Duchlanis dilatata » 5 < Ehrenberg, Die Infus. 1838, p. 463, Taf. lviii. fig. 2. 
“4 a a * 5 Cohn, Sieb. wu. Kéll. Zeits. ix, 1858, p. 289, Taf. xiii. fig. 4. 
' Jenaisch. Zeits. f. Natur. 1885, Taf. ii. fig. 18. 
