122 THE ROTIFEEA. 



lateral antennse protruding from small orifices on tlie dorsal surface of the lorica : one 

 ou 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 glidmg motion, traihng foot, and 

 ■white lorica : a whiteness due to the minute dots of chitiue with which it is frosted. 

 Happily tlie lorica is very thin, so that it is easy to see the viscera, in spite of the ridges, 

 facets, and frosting. 



Length. Of lorica, Jj inch. Habitat. Ponds and ditches, near London, (P.H.G.); 

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



Familv XIX. ANUE.EADiE. 



[Lorica hox-Iike, broadhj open in front, behind opeyi only by a imrrow slit; usually 

 armed icith spines, or clastic seta ; foot tcholly tvanting. 



The genus A7iuraa 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 Brachionida: ; and uieluding 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 tropM dififer fi-om those of the Brachionida 

 in that the maniibria, 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 sutaj. One 

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



Genus AXUEJilA, Gosse, nee Ehrenberg. 



[GEN. CH. Lorica a?! oblong box, open tvidely in front, narroivly i?i rear; dorsal 

 surface ttsnally tesselated; the occipital edge always, the anal sometimes, furnished with 

 sjnnes; the egg after extrusion is carried atiaclied to the lorica. Lacustrine. — P.H.G.] 



A. cuE^acoENis, Ehrenberg. 

 (PI. XXIX. fig. 9.) 

 Anuraa curvitornis . . . Ehrenberg, Die Infus. 1838, p. 505, Taf. Ixii. fig. 5. 



[SP. CH. Lorica obhng, rounded behind, tesselated, armed icith six occipital spines, 

 of which the viiddU 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 iucomi^lete hexagon. From the 

 lateral angles other ridges proceed laterally, formuig 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 smaU orifice, 

 through which I have seen the rectum protruded for a short distance, and then retracted. 

 There is an ample contractile vesicle. The three mam lobes of the rotatory organ are 

 large and prominent when in action, each bearing a great round iieshy papilla, besides 

 a smaller one on each side ; each carries a divergent fan or brush of stout sets. The 



' 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. 



