122 THE KOTIFEKA. 



lateral antennae 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. 1 



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, -^ inch. Habitat. Ponds and ditches, near London, (P.H.G.); 

 Clifton (Mr. Brayley ; C.T.H.) ; Birmingham (Mr. Bolton junior) : not very common. 



Family XIX. ANUE^AD^E. 



[Lorica box-like, broadly open in front, behind open only by a narrow slit; usually 

 armed with spines, or elastic seta ; foot wholly wanting. 



The genus Anurcea 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 Brachionidce ; and including several genera. The body is inclosed in a 

 compact box-like lorica, open in front and rear. They have no foot, and therefore are 

 incessant swimmers, never resting. The trophi differ from those of the Brachionida 

 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 sette. One 

 eye is conspicuous, cervical. They are both marine and lacustrine. P.H.G.] 



Genus ANUB^A, Gosse, nee 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 ivith 

 spines; the egg after extrusion is carried attached to the lorica. Lacustrine. P.H.G.] 



A. CURVICORNIS, Ehrenberg. 



(PI. XXIX. fig. 9.) 

 Anuraa curvicornis . . . Ehrenberg, Die Infiis. 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. Qa). 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 setas. The 



1 I 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. 



