227 
with pollen, but of different colours, some was red and some was 
pale yellow. I took them home and washed some of the pollen 
off the leg of the Andrena on to a glass slide with chloroform, 
and a quarter inch objective revealed the fact that instead of one 
species of pollen grain there were many; not being acquainted with 
the microscopical appearance of the grains, I cannot say how many, 
but 1 could readily distinguish several decidedly different forms, 
clearly proving that these insects do not confine their visit to one 
species, but that all is fish that comes to their net; there is no 
doubt however that some species of bees are rarely to be found 
except at one particular species of plant. — J. B. Bridgman. 
Singular Monstrosity of Nomada succincta. — The second 
dorsal plato of this unfortunate bee, seems to have been 
divided, and the right sido to have united with the left 
half of the third segment ; but the two halves of the second 
segment appear to bo united at the base, and the apical margin of 
the joined segments is perfect and continuous, the right hand half 
of the third segment is separate and distinct, as if it had been 
broken down the centre, the result is, that instead of a transverse 
band of yellow across each of the two segments (second and third) 
there is a band crossing from the right of the second segment across 
to the left of her third segment, whilst there is an angular pointed 
spot on the left half of the second and the right of the third 
segment : this accident I should think must have taken place early 
in the pupal stage, as chitine when once fully formed is incapable 
of repair or reproduction. — John B. Bridgman. 
Botany. 
Clathrocystis -Kruginosa ( Hevfrey ). — The first occurrence of 
this alga was noticed by Mr. TIenfrey in a paper published in the 
Trans, of the Mic. Soc., New Series, vol. iv. p. 53, pi. 4, figs. 
28 — 3G. He says, “ This remarkable form does not appear to 
havo been hitherto found in Britain — we found it in the autumn 
of 1855 forming a scum extending over a large portion of the 
lake in the Royal Botanic Gardens at Kew.” 
Mr. Currey subsequently figured a form which he says differs 
from those of Henfrey in the greater number of the reticulations. 
(Mie. Joum. vol. vi.) 
This difference would seem from the observations I have made 
