70 
PROCEEDINGS OF SOCIETIES. 
hedges, also on dandelions, at Glanville’s Wootton, April and May, 1856 ; some of 
them stylopized. A. schrankella ; middle of August, 1824, in plenty on flowers of 
Scabious, by the Moores river at West Hurne, Hants; has not occurred since. 
A. analis, in various years, 1823, 1835, 1842, 1845, between the middle of June 
and middle of July, at Parley Heath and West Hurne Heath; Elsington Wood 
and Knighton Heath, Dorset, and in gravel pits by Holnest and Holm Bushes, 
about three miles from Glenville’s Wootton. A. separata (probably only a variety 
of A. labialis ), May 12, 1827, at Charmouth, not stylopized ; A. labialis , which is 
found at Glanville’s Wootton, produced Stylops dalii, which has the base of the 
wings quite clear. This is not the case in the Stylops produced from A. convexiu- 
scula (formerly considered as barbilabris ), which I have always found more or less 
stylopized. A. argentata , first at Lancross, near Bideford, Devon, July 20, 1830 ; 
afterwards in plenty on Sands, Bourne and Boxcombe Chines, August 19, 1845. 
Nomada baccata , Bournemouth and Ramsdown, August, 1835. dV. roberieotana , 
on hawkweed, near Parley Copse, June 27, 1823 ; Elsington Wood, Dorset, July 
4, 1845 ; Holnest gravel pits, July 18, 1832. 
Megachile circumcincta , Parley Heath; received also from Newcastle, G. Wailes, 
Esq. M. leachella , Portland and Bristol. 
Ccelioxys rufescens , on a mud wall at Stilton, Hants. C. vectis , Isle of Wight 
and Isle of Portland. 
Osmia bicolor , Cranborne Chase, Dorset, and Bristol. 
Mr. E. Percival Wright read the following notes on a 
DISEASE ATTACKING THE MINNOW. 
Not long since a friend of mine brought me a specimen of a minnow (Leuciscus 
phoxinus) which presented a very remarkable appearance, being covered all 
over with minute black spots, which, on a casual glance, looked tubercular: you 
are, doubtless, aware that in this genus (Leuciscus) the surface is nearly 
smooth, the scales being very small; the general colour of L. phoxinus being 
dusky olive, an I somewhat mottled. This specimen had been placed along with 
some gold fish from the Victoria regia house, Glasnevin, in a small aqua- 
vivarium, and was constantly fed upon flies. After a short time it appeared rest¬ 
less, and every now and then it came up to the surface of the water, gasping for 
breath; every day seemed but to increase the little minnow’s troubles, and its 
efforts to breathe seemed constantly on the increase, as it every moment 
swam to the surface; and the incessant muscular efforts of the gills must have 
been most troublesome, and shortly became such that the fish flung itself out of 
the water, and very soon ceased to breathe. The following morning I examined 
it, and found it completely covered over with these small black spots. They 
did not rise above the surface, but were small and well defined in outline, the small¬ 
ness of the scales making them more apparent. When examined under the micro¬ 
scope, with a one-fourth inch of Ross, these spots had all the appearance of large 
pigment cells—fine veins of a dark carbonaceous looking matter radiating from a 
centre, and were deposited between the skin and the muscular structure. Upon 
dissection, I found the branchiae of the gills gorged with this peculiar deposit, 
some of them beautifully injected, others plugged up with small particles. Part of 
the stomach was also discoloured; but, with the exception of this abnormal secre¬ 
tion, there was nothing else to account for death. 
A good deal has been written upon the diseases to which fish when kept in 
confinement are liable, but I am not aware that this remarkable one has been 
observed or recorded before. I have little doubt that it resulted from the long 
continued feeding upon the same sort of food, and that a change of diet would 
have obviated the evil consequences. But I would not like to say whether it 
died altogether from the effects of asphyxia, the branchiae being rendered im¬ 
permeable to air ; or whether, if this had not been the case, it would not have 
died from the effects of the extensive blood poisoning, as manifested in the 
sudden effusion of this foreign substance throughout the surface of the skin. 
