NOTES AND QURRIES. 
449 
On Iraving tlic Nid, tlio toiin'si may visit, P.rimliam Enoks, wliirli lie among 
1 lie moors on its northern bonndary. We crossed over them to Ilaeklall and 
Masliam ; and onr last, glance at the imrplc swells of the lieathery moors was 
oiic^ of regret - almost of pain -at leaving t he fresh l)r(-e/,es aiid t he w ide 
horizon for the ch)se hot dales and still closer, hotter, smoky towns of Y(n-k- 
shire. — EnwARn Wood, F.G.S., Richmond, Yorkshire. 
Plates of Bourguetichiniis.— Dear Sik,— Yon will find on the accom- 
]ianying M'oodcnt fignres of extremely rare forms of Apriocrinitcs, (n- stem- 
l)hites of the crinoid, now more commonly called by U'Orbigny's new generic 
name of Boui-gucticrinus, instead of the former term given to' these fossils by 
Miller. 
[Specimens of stem-plates of Boiirgueticrinus from the Upper Cbalk of Ke t.J 
Fig. c is represented on account of its unusual size. It is from Kent. 
This is not in my collection, liaving been lent to me many years since. All the 
specimens figm-ed on the block, as also others with remarkable articulations in 
my collection not yet been figured, are from the Upper Chalk of Gravescnd. 
In Dixon's Geology of Sussex, table xx., figs. 37, 38, are two stems allied to 
mine. On reference to Morris's catalogue, page 73, I tind other forms besides 
the B. elUpticm have been published by D'Orbigny and McCoy. — Very truly 
yours, N. T. Wetiierell, Highgate. 
OjiSERVATIONS UPON CERTAIN GEOLOGICAL INFERENCES. — SlE, — I have 
carefully considered the strictures which you have thought proper to append to 
my communication, for the acceptance of which I thank you ; and I am sure 
that you will allow me some op])ortunity of extricating myself from the ap- 
l)arently unfortunate position in which your remarks have placed me ; which I 
shall consider in order. 
To say that granite is only a crystalliue condition of rock, is just the same as 
saying that ice is only water minus a certain portion of its latent heat. It is 
rock in tliis condition which constitutes granite ; and inasnuieh as we could 
not decide whether any given unerystaUised rock would become granite upon 
igneous agency, because we have never experienced the operation, it is useless 
to talk of any rock which, if subjected to igneous agency, woidd become granite, 
not knowing whether such constitutes any portion of the earth's crust. I do 
not understand your meaning when you say that granite may be coeval with the 
newest of the Tertiary formations. You cannot mean to say that its formation 
is synclironal with the London clay, for example ? As regards rocks dipping 
