70 THE ROTIFERA. 
[I suspect the Distemma setigerum of Ehrenberg to belong to thisgenus. He himself 
alludes to the liability of confounding it with Rattwlus, as well as to the difficulty of 
resolving the very slender toe, which, at first sight, seems single ; and to his inability 
to see any proper foot-joint. Yet he assigns to the species two eyes; which does not 
accord with any true species of Cwlopus known to me.—P.H.G.] 

Caxopus (?) minutus, Gosse, sp. nov. 
(Pl. XX. fig. 20.) 
[SP. CH. Two eyes, wide apart; mastax and rotating cilia (apparently) wanting ; 
body rotund, minute. 
Little as I know of this tiny animal, enough is manifest to show that itis one of much 
physiological interest. Though for convenience of reference, and because of certain 
conspicuous resemblances, I place it with the C@lopods, it must be considered a species 
incerte sedis. The general figure, plump and round, recalls C. porcellus and cavia, and 
so do the short, curved foot, thick at its base and tapering to a sharp point, and its 
manner of articulation. Yet, whether the structure of this member is that peculiar to 
Celopus,—a secondary spine lodged within the inferior concavity of the principal,—I 
cannot certainly affirm. I strove hard to determine this point, but could not obtain 
absolute certitude. It appeared single and indivisible. 
But it is at the anterior extremity that the chief anomalies of the little creature are 
found. ‘Two cervical eyes are seen, tiny globelets, brilliant and distinct, set wide apart, 
close within the outline on either side, in a dorsal aspect (fig. 20). I could find no 
trace of mastax or trophi, in general so largely developed and so conspicuous in this 
family ; but instead of it what seemed a simple slender duct or tube, formed by the union 
of two short branches which communicate with the front, and open into a great sacculate 
stomach ; as if the esophagus had been continued upward,—the mastax being atrophied, 
—to the very front, or rather merged into the buccal funnel. Again, with the closest 
scrutiny I could detect no cilia nor any ciliary action. 
Only a solitary example has occurred to my observation, from the Black Loch, near 
Dundee. It was alive but inert, and to a certain extent glued fast to the glass by an 
excretion from the foot.—P.H.G.] 
Length, ;}, inch. Habitat. Black Loch, near Dundee (P.H.G). 
Family XII. DINOCHARIDAG. 
Lorica entire, vase-shaped, or depressed ; sometimes facetted, often spinous ; head 
distinct, with a chitinous covering ; foot and toes often greatly developed; trophi 
symmetrical. 
Of the three genera, which together form the Dinocharide, two, viz. Dinocharis and 
Scaridium, resemble each other in the great length of the foot and toes, and in their 
conspicuous condyles. Both these genera are also completely loricated ; but whereas 
in Scaridiwm the chitinous cuticle is thin, somewhat flexible, smooth, and transparent, 
in Dinocharis it attains a greater development than in any other genus of the Rotifera. 
For, not only is the trunk completely enclosed in a dense lorica shagreened with little 
knobs, ornamented with ridged facets, or bristling with spines, but the head and foot 
also ave similarly protected, and the lorica stretches down eyen to the base of the toes. 
The third genus, Stephanops, resembles the first two in haying a chitinous covering for 
the head, and in bearing stiff spines, which are not organs of locomotion, on various 
parts of the trunk; but its skin can hardly be termed a lorica, and its foot, though 
well-jointed and often spinous, is never immoderately long. The head-gear in the 
= 6 he eteeied 
