A NEW ROTIFER. 9438 
deeply marked with hexagonal areole; a ciliated furrow or groove 
passes round the widest part, and it is besides furnished with a long 
flayellum, starting from the base of the central frontal horn, where is to be 
seen a bright clear space, of an irregular oval shape, probably a vesicle, 
though I have observed no contraction nor any signs of its purpose. It 
swims either forwards or backwards, with a rolling motion. 
Fig. 3 is a somewhat different form, taken at Sutton Park last June, 
and figured by my friend Mr. H. E. Forrest, which had, besides a vesicle 
more centrally situate, three very distinct red spots, which in some 
analogous species have been variously set down as eyes or eggs, and 
upon which I am unable to throw any light. 
ON THE ROCKS OF BRAZIL WOOD, CHARNWOOD 
FOREST. 
BY S. ALLPORT, F.G.S., AND W. JEROME HARRISON, F.G.S. 
This geologically interesting locality has already been briefly 
described in the pages of this magazine (Vol. II., p. 119,) and the occur- 
rence of garnets in the ‘“‘ gneiss” noted (p. 77.) Quite recently, a micro- 
scopical examination of the so-called gneiss convinced one of us that it 
was an excellent example of contact-metamorphism, similar in character 
to that observed round the margins of large masses of granite. <A visit to 
the wood was at once made, and the result of a few hours’ work was the 
collection of two heavy bags of specimens, and an interesting addition to 
the known geological facts of the district. 
Brazil Wood lies on the east side of Charnwood Forest, between 
the villages of Swithland and Mount Sorrel. It is in a valley occupied 
by the Keuper Red Marls, which cover over the intervening space between 
the slate quarries of Swithland and the great granitic mass of Buddon 
Wood and Mount Sorrel. Only in Brazil Wood do we get any indication 
of the line of junction of the slaty and granitic masses, this line being 
everywhere else covered over and concealed by the red marls. The 
wood is about one hour’s walk (three miles in a straight line) from Sileby 
Station, on the Midland main line. 
In the field next to the wood on its north-west side there is a small 
knoll of diorite, which is distant only about 100 yards from the granite, 
and the latter appears to be connected with the Buddon Wood mass by 
an exposure at Kinchley Hill, half-way between. 
Entering Brazil Wood from the direction of Mount Sorrel, we see on 
the left hand (north-east portion of wood) a small conical hill of granite, 
about 750 yards in circumference at the base, and rising from 7Oft. to 
100ft. above the surface; on the right hand (south-west part of wood) is 
a smaller knoll of a rock which has hitherto been called “gneiss.” On 
the western side of the granitic mass on the lower edge of a very small 
