122 
THE MIDDLE LIAS OF NORTHAMPTONSHIRE. 
beds than to those simply studying the list of fossils from 
them, owing to the abundance of individual specimens of 
common forms rather than distinct species. 
So far as my own observations go, bed “L” is the 
highest in which Avicula cygnipes and the very large specimens 
of Pecten licisinus occur. Limeci acuticosta reaches its maxi¬ 
mum development in the beds “I,” “ J,” “ K,” and then 
rather rapidly declines in numbers ; the same remark applies 
to Unicardium globosum. Pholadomyas are met with in 
greatest abundance in bed “ H,” but above this they are 
comparatively rare. Bed “ F ” seems a very decided 
boundary for a number of fossils. Ammonites margantaius, 
Pleuromya costata, Cardinia antiqua, Cardinia lee vis, Goniomya 
heteropleura, and Arcomyas practically finish in it, only 
stragglers of any of them being found above. “D” is the 
highest bed in which 1 have found Pholadomya amhigua and 
Cardita multicosta, and the lowest for Pecten textorius. 
The Rock-bed “ B ” contains a good number of things 
not yet found in any of the lower beds —Ammonites spinatus 
PLmnites , Pectens, Limas, Spiri/erinas, and enormous numbers 
of Brachiopods ot the classes Terebratula and lihynchonella, of 
which I have not found even the genera in the “ Margaritatus ” 
Zone of Northampton. 
I need not here enumerate the fossils peculiar to the 
Transition-bed “A,” because they are numerous, and the 
table of fossils to follow will sufficiently show them. Whether 
we regard the Transition-bed as a separate bed or only a 
modification of the Rock-bed, there is certainly as much 
difference between it and the true Rock-bed—paleontologi¬ 
cally—as between any of the Middle Lias beds. 
The following fossils have a considerable vertical range, 
passing through all or nearly all the beds : —Ostrea cymbium, 
Pecten liasinus, Pecten cequivalvis, Limea acuticosta, Plicatula 
spinosa, Avicula in cequivalvis, Astarte striato-sulcata, and Proto- 
cardium truncatum. 
(To be continued.) 
Colours of Flowers. —The shades of red and brown in the leaves of 
zonal pelargoniums are due to the same colouring matters as are found 
in the flowers of those plants. Hence when the flowers are picked off, 
which is a common practice with gardeners, the tints of the leaves 
become more brilliant, because they then monopolise the whole 
supply.—H. 
Dressing for Insects. —Mix nine parts of benzole with one part of 
carbolic acid. This may be lightly brushed over the insects with a 
camel-hair brush. Beetles, &c., may be dipped in bodily, and the 
excess fluid removed with the brush.—H. 
