REVIEWS. 
o59 
TioN.— Page 411, line 15 from top, for "merely" read uialdy line 28 from 
top for "Barkley, it'* read " Barkli/, and.'' 
Erbata in "Fossils of North Bucks." — Page 483, for " gryphaea" rostrata 
read " gli/pJuea" rostrata; page 4SG, for "spbserodus" read spJiwrodi'.s (F) ;" 
])age 485, 2ud line, for "GryWst" read •'Gayhunt page 487, for "Cardium 
dissimile" read " C. cogmtiim ;" and, the same page, for " Pecteu areuatus" 
read " P. areuatus''' 
Bone Spear-head. — Of the bone spcar-head of which we have given two 
views in Plates 13 & 14, we have less to say than we could wish, its history is 
^ ery short, and not so satisfactory as one could wish it to have been, although 
the state and appearance of the fossil itself leaves no doubt of its strati- 
graphical age. 
Mr. Robert Mortimer, of Timber, by whom the specimen was sent to us, 
ihus writes of it : — " I can only state at present that the specimen was picked 
up by my brother, Mr. J. R. Mortimer, about three years asjo, along with a 
lot of shark's teeth, from a large heap of coi)rolite belonging to Messrs. 
Rhodes, Smith, and Co., of Selby, manure manufacturers. The coprolite was 
from Essex, but I caimot give tbie exact locality, nor any section showing the 
bed it came from." 
This is all that is known about it, and it would be well that geologists in 
the vicinity of any of the Essex, Suffolk, or Norfolk coprolite pits should 
make close search for other examples. — [Ed. Geologist.] 
REVIEWS. 
}\Oi'tli British Rccieic for 18G1. 
AYc liave, on former occasions, more tlian once referred to Sir Roderick 
Murchison's late successful elimination of the key-stone to Scottish Geology. 
For years upon years the mighty masses of gneiss, sandstones, limestones, 
schists, and slates were attacked persistently and elaborately by Macculloch, 
and, Nicol, Jamieson, and other first-class minds without avail. In his early- 
manhood Sir Roderick, accompanied by another of our best workers in Paleo- 
zoic Geology, walked over and sketched the massive strata of his native High- 
lands, which again, after his long-laboured and most persevering exertions in 
accomplishing the establishment of Ms Silvirian formation, after his forty years 
of active service in the cause of that one great and interesting group wliich he 
has raised to a pre-eminence of elaboration unattaincd by any other section of 
the great Past, his mind has returned to his native land, and with the expe- 
rience of an active life to guide his still persevering energies, he has snatched 
its crowning glory from the spot which of all others must be most dear to his 
heart. Of the labours of Mucculloch little is known to ordinary British geo- 
logists, except by a few quotations and woodcuts in the popular works of 
Lycll and others. But if Muccolloch, Nicol, and others failed it was because 
tliey were mineralogists and not geologists. It would not be sulficient for a 
man to distinguish readily the various qualities of papers of which the books 
of a library were composed, if he were ignorant of the value and meaning of 
the letters which were printed on their leaves. So the former Scottish 
geologists, although prying with the utmost minuteness in the study of the mineral 
characters and conditions of the Scottish strata, missed the true history of their 
formation in not learning the value and meaning — indeed even the existence—^ 
