66 Ammonites of the Yorkshire Cornbrash. 
On the outer periphery there are six ribs in 23 mm. and the 
‘same near the inner whorl. 
Macrocephalite compressus Quenstedt. The three best 
specimens of this Ammonite that I possess are not in very 
good condition. They are all small and the best specimen 
shews the compression and very fine ribs which are very little 
curved in comparison to the other species. 
There are sixteen ribs on the periphery nearest to the body 
chamber, and twenty-two on the periphery inside. 
The diameter of the ammonite is 45 mm., and the diameter 
of the umbilicus is 8 mm. 
The inner smaller ribs do not seem to join the thicker 
ribs, which continue to the umbilicus except occasionally, but 
seem to die away before the wall of the umbilicus is reached. 
Macrocephalites hudlestoni Blake. The best specimen of this 
ammonite 1s 44 mm. in diameter, and the diameter of the um- 
bilicus is 8mm. The thickness is about 25 mm. or little more 
than half che diameter. The ribs have scarcely any curve and 
are thick about Io in 23 mm. on the outer periphery, and 13 
on the inner. 
In all these ammonites the thickest part is always near the 
umbilicus which is, as a rule, very small. 
The Macrocephali I think, are a peculiar genera of the 
Siephanoceras family, different from the other genera, especially 
by their closed up umbilicus. 
It would seem, therefore, that these ammonites, coming in 
directly after the Estuarine series, and being continued to the 
Oxford clay, show that the Cornbrash is really the commence- 
ment of the Middle Jurassic, especially the upper half of this 
strata. 
We are indebted to Dr. G. C. Crick for his assistance in the 
identification of the more critical species. 
7-O:; 
Among the Committees of research appointed at the recent meeting of 
the British Association in Australia we notice a committee ‘ to formulate 
a definite system on which collectors should record their captures,’ and 
another for “a natural history survey of the Isle of Man.’ 
The Vicar of Wawne recently wrote to the press with evident concern. 
On his return home recently his wife found the cast skin of a grass snake 
on his back, and he asks for information as to how it could possibly 
have got there. If he had been a layman it might be suggested that on 
returning from Christmas revels he must have fallen into a dyke or into 
a field where such objects occur. But as he is a clergyman we cannot say. 
The Yorkshire Observer for December 9th gives a list of the members 
of the Leeds Naturalists’ Club who have joined the Forces, viz., Captain 
J. EL Priestley, Captain Hea]: ae seutenant SIE Lupton, Second 
Lieutenant E. H. Croft, H. Murphy, N. T. B. Turner, W. Withell, C. D. 
Ingleby, F. Fowler, A. Hodgson and 2 Je ats Mrokedkes — Ibal addition, Pro- 
fessor Garstang is Chairman of the Military Committee in charge of the 
Officers’ Training Corps of the Leeds University. 
Naturalist, 
