122 THE ROTIFERA. 
. 
lateral antenne® protruding from small orifices on the dorsal surface of the lorica: one 
on each side, between the edge and the five-sided facets on the centre of the back.! 
This is a bottom-haunting creature; and, in my experience, not a very common one. 
When captured it betrays its presence by its slow gliding motion, trailing foot, and 
white lorica: a whiteness due to the minute dots of chitine with which it is frosted. 
Happily the lorica is very thin, so that it is easy to see the viscera, in spite of the ridges, 
facets, and frosting. 
Length. Of lorica, 7; inch. Habitat. Ponds and ditches, near London, (P.H.G.); 
7 
Clifton (Mr. Brayley ; C.T.H.); Birmingham (Mr. Bolton junior): not very common. 

Family XIX. ANURHADA. 
[Lorica box-like, broadly open in front, behind open only by a narrow slit; usually 
armed with spines, or elastic sete ; foot wholly wanting. 
The genus Anur@a of Ehrenberg, already extensive, and now augmented by many 
new species, ought to constitute a distinct family, very different in form, structure and 
habit from the Brachionide ; and including several genera. The body is inclosed in a 
compact box-like loriea, open in front and rear. They have no foot, and therefore are 
incessant swimmers, never resting. The trophi differ from those of the Brachionide 
in that the manubria, though usually clubbed, never take the expanded semi-circular 
shape. The cilia, too, are not set around a two-flapped corona, but on three large 
eminences, each of which terminates in a globose lobe, crowned with stout sete. One 
eye is conspicuous, cervical. They are both marine and lacustrine.—P.H.G.] 
Genus ANURHA, Gosse, nec Ehrenberg. 
[GEN. CH. Lorica an oblong box, open widely in front, narrowly in rear; dorsal 
surface usually tesselated; the occipital edge always, the anal sometimes, furnished with 
spines ; the egg after extrusion is carried attached to the lorica. Lacustrine.—P.H.G.] 
A. curvicornis, Ehrenberg. 
(Pl. XXIX. fig. 9.) 
Anurea curvicornis ; 5 4 Ehrenberg, Die Infus. 1838, p. 505, Taf. Ixii. fig. 5. 
[SP. CH. Lorica oblong, rounded behind, tesselated, armed with six occipital spines, 
of which the middle pair are procurved ; no spines behind. 
Of the tesselations, the medial row alone is perfect, of five facets; the posterior 
three are hexagons, the next square, the foremost an incomplete hexagon. From the 
lateral angles other ridges proceed laterally, forming other polygons, which are usually 
evanescent. Of the spines, the central pair (antlers) are strong, and curved forward, 
sometimes mutually approaching, sometimes receding. ‘The lateral pairs are short, 
straight and pointed. From the outmost pair descends a prominent ridge on each side, 
making a sharp lateral edge to the lorica (fig. 9a). The eye is very large and brightly 
conspicuous; the mastax is a wide oblate spheroid, with mallei and incus well developed. 
A wide sacculate stomach follows, crowned with normal gastric glands, and descending 
with no distinct constriction to the hind end of the lorica, where there is a small orifice, 
through which I have seen the rectum protruded for a short distance, and then retracted. 
There is an ample contractile vesicle. The three main lobes of the rotatory organ are 
large and prominent when in action, each bearing a great round fleshy papilla, besides 
a smaller one on each side; each carries a divergent fan or brush of stout sete. The 
1 T missed these in the living animal, but, afterwards, found the apertures (fig. 5a, a’) easily in an 
empty lorica, in the spots mentioned by Dr. Plate. 
