128 THE ROTIFERA. 
Genus ERETMIA, Gosse. 
[GEN. CH. Lorica neither tesselated nor ridged ; destitute of spines proper, but 
furnished with long attenuate rigid bristles. 
This seems to be a natural group, containing numerous species. They appear to be 
destitute of the spines common to Anurea, pointed extensions of the lorica itself; for 
the slender appendages are quite different in form, and probably in function.—P.H.G.] 
K. PENTATHRIX, Gosse, sp. nov. 
(Pl. XXIX. fig. 12.) 
[SP. CH. Five long bristles projected from the lorica ; one dorsal and two from each 
side: no frontal or posterior spines. 
This species I know only from a single dead and empty lorica which I found in the 
sediment of water, dipped in June, from a pool at Sandhurst, Berks, by Dr. Collins. 
The lorica is ovate, truncate in front, with no spines of the ordinary pattern, but bearing 
attached to the medial line of the dorsum a long stiff seta, or attenuate spine, the base 
of which is deep but very thin, the depth gradually diminishing. From the sides, about 
two-thirds down, spring a pair of similar bristles of less basal depth; and, at a short 
distance from the round extremity of the lorica, another pair. All radiate from the 
surface of the lorica, and are consimilar in length and tenuity. No trace of the internal 
organs was left. 
This has evident affinities with the A. biremis of Ehrenberg, which he describes 
from a single specimen obtained in the Baltic Sea. That species, however, has four 
frontal spines.—P.H.G.] 
Length, unrecorded. Habitat. Pool near Sandhurst Mil. Coll. (P.H.G.): very rare. 
E. cuBEUTES, Gosse, sp. nov. 
(Pl. XXIX. fig. 11.) 
[SP. CH. Lorica bag-like, round behind, truncate before; with a diverging seta 
from the dorsum and one from the venter; four straight spinous processes from the 
rounded end ; the whole surface cut into cubical tessere. 
This minute and very curious form I place in the genus Hretmia, though the body 
processes seem rather spines than set. I have found it, but only as a dead lorica, on 
two separate occasions, and in water from widely distant localities; but Mr. Hood has 
since found it living, and sent me a good drawing of it, which well agrees with my own. 
All were in autumn and winter of 1885-86. : 
The lorica edge is not spined, but notched. Yet the notches are but the intervals 
between the tesser@ of the front row, of which three are seen beside the lateral two. 
For the entire surface of the lorica is marked with two series of depressions, those of 
each series parallel to each other, but the two series crossing each other at right angles 
(or nearly); so as to leave a multitude of square tessere, or cubical knobs,—like dice 
set corner-wise :—a form of surface quite unique, so far as I know. I was, indeed, dis- 
posed to think it an Arcelline Infusory of the genus Difflugium, till I received Mr. Hood’s 
report, which showed it a true Anwread. He describes the rotatory front as bearing 
the normal three great ciliate lobes. The large red eye I had myself seen.—P.H.G.] 
Length (including spines), +1, inch (P.H.G.); 5}, inch (Hood). Habitat. Birming- 
ham (P.H.G.); Black Loch, Dundee (Hood): rare. 
