1902} MICROSCOPICAL JOURNAL. 67 
tural arrangements to serve the purpose of combs and 
brushes for clasping, mating, and so forth were described 
in a number of genera and species. Drawings were ex- 
hibited, and a number of specimens shown under micro-. 
scopes kindly lent by Messrs. Baker, of Holborn. The use 
of many of the modifications is problematical or quite un- 
known, and the author emphasized the far greater utility 
of observations directed towards clearing up some of these 
and other points in bionomics over that of merely making 
a collection of specimens. A paper on Ecpolus papillosus, 
n.s.—an unrecorded Hydrachunid found in Britain, by Mr. 
C. D. Soar, was communicated by Mr. Scourfield. It ap- 
pears that hitherto the genus has only been described 
from Madagascar. The specimen itself was exhibited by 
Mr. Taverner, in addition to drawings by the author. 
MISCELLANEOUS. 
OBSERVING THE CIRCULATION OF THE BLOOoD.—The clas- 
sical method for observing the circulation of the blood in 
living animals stands at present where it stood thirty and 
odd years ago, confined to limited parts of certain organs 
in the frog and other batrachians, the wings of the bat, 
the transparent parts of embryos of mammals, &c. It is 
about 17 or 18 years since, for the first time, I had an op- 
portunity of observing, under the microscope, the embryo 
of a small fish that swarms in the lake of Managua, in 
this country. This fish, about 6 to 7 centimeters long, 1 
centimeter wide, and 5 to6 millimeters thick, lays its eges | 
on weeds and roots of plants growing along the lake 
shores, towards the beginning of the dry season, from 
November to March. The eggs are spherical, nearly two 
millimeters in diameter, transparent, and of albuminous 
appearance, and are furhished with a few hairy append- 
ices, by which they are fastened to the weeds or roots 
under water, clustered like grapes in bunches of many 
