Catalogue Raisonné. 393 
Geological Survey of the Island of Jersey. By Lizur. Nexson, 
Royal Engineers, Corresponding Member of the Plymouth Insti- 
tution.— Quarterly Journ. of Science, No. Il. Jan. 1830. 
The Jersey rocks may be referred to three classes; 1. that of the argilla- 
ceous schists ; 2. that of such as are distinguished by the presence of feld- 
spar; and lastly, that of the breccia, composed of both. 
The feldspar rocks overlay the breccia and argillaceous schist, alternating 
with the last, which is also overlaid by the breccia. see 
We strongly suspect that there is some mistake in this statement. In the 
first place, because if the feldspar rocks overlay the breccia, how can 
they alternate with the schist, which is stated to be below this rock ? 
And secondly, from the account given of the feldspathic rocks, we find 
Nos. 13, 41, 42, 45, 52, to be feldspar, quartz, and hornblende, (sienite ;) 
and No. 114, chlorite slate, and Nos. 50, 51, and 53, varieties of granite, 
15 and J7, feldspar and schorl. The age of these rocks must evidently 
be greater than that of grewacke or of breccias. 
Porphyries of various characters, with feldspathic bases, occur along the 
coast at different points, where veins (dykes) of greenstone are also met 
with. Sienite is found at Mont Orgueil, La Hogue Bie, and Mount 
predoe, &c. and granite half way between Plemont and Greve de Lag, 
to ay. 
The Phebe consists of five varieties,—argillaceous, sienitic, and porphy- 
ritic pebbles, in an argillaceous matrix,—and argillaceous and sienitic d°. 
in a sienitic matrix. The islets of Chansey appear to be entirely consti- 
tuted of granitic rocks, which decompose in circular blocks. ‘The rock 
is said to be stratified. There is.a wood-cut of the columnar appearance 
assumed by porphyry in Trinity Vailey, and several others of much in- 
terest. The communication is carefully got up. 
Systema Mycologicum, sistens Fungorum orsines, genera et spe- 
cies, huc usque cognitas, quas ad normam methodi naturalis deter- 
minavit, disposuit atque descripsit Enias Frizs. Vol. II. Sec- 
tio. Prior. Svo. 1629. 
The Fungi hold the lowest rank in the vegetable kingdom, and have been 
among the last to receive that scrutinizing investigation which other 
tribes have mostly obtained in this analytical age. ‘The Synopsis Fun- 
gorum of Persoon, the father of modern mycology, published 80 years 
ago, was the first work which threw any sort of light upon the “ vermes 
ot the vegetable kingdom.” Since that period, a host of indefatigable 
Germans have given them no quarter; and often while the French 
thought only how to make an Agaric, a Boletus, a Trufile, or a Morelle, 
form some new article in the Almanach des Gourmands, the aforesaid in- 
vincible philosophers were propagating Mucors, and discovering un- 
known plants upon every rotten stick in their dark forests. To the 
Germans, and to their more northern brethren, we now owe mest of our 
information. and Professor Fries, in the work we are now noticing, as 
well as in others, stands unquestionably at the head of living mycolo- 
gists. It is true that Persoon, in his old age, is publishing a Mycologia 
Europea, but it is vastly inferior to the Systema Mycologium, and creeps 
on slowly, while a half volume is only reqiured to complete the latter 
work. When we say that the present section contains the Gasteromyct, 
and that the execution is in every respect equal to that of the former 
volumes, we say all that is necessary to recommend it to public notice. 
On a Prismatic Structure in Sandstone induced by Artificial 
- Heat ; and on certain Prismatic Rocks found in Nature, including 
the Columnar Sandstone of Dunbar. By J. MacCuxiuecn, M.D. 
&c.—Quarterly Journ. of Science, No. XI. Jan. 1830. | 
In a late Number of this Journal we had called the attention of the scien- 
tific public to two striking illustrations of the prismatic form in moun- 
9g 
YOL. I. od D 
