REVIEWS* 
69 
necessary for the purposes of description and recognition. Yet, on the 
whole, he has abstained from using his privilege of creating and naming 
unnecessary fossil species in this volume more than might have been ex¬ 
pected from his previous works. Amongst his new genera, the geologist 
will gladly perceive several which ought to have been recognised before, and 
which serve to draw more distinctly the line of demarcation between recent 
and fossil forms. Among the most judicious of these changes we may 
mention the new genus Aviculopecten , of the middle and upper Palaeozoic 
beds, to the separation of which from the recent Pectens , Mr. M‘Coy was 
led by the examination of a series of fossils from the dark limestone of 
Lowickj Northumberland, at present preserved in the collection of the Uni¬ 
versity of Cambridge. From these fossils it was evident that in the Paleo¬ 
zoic Pectens there was no mesial ligamentary pit beneath the beak, as in 
recent Pectens, but the ligament, as in Avicula , is confined to the hinge 
margin, while the external form of the shell closely resembles the recent 
Pecten , with the exception that the posterior ear is larger than the anterior , 
thus differing from Pecten and approaching Avicula. 
We strongly recommend this handbook of Professor M‘Coy to those geo¬ 
logists who have an opportunity of comparing its descriptions with the 
Cambridge fossils, and to those who are in possession of the works in which 
the fossils described in it are figured. 
The Entomologists’ Annual for 1853, comprising Notices of the 
new British Insects detected in 1854. Edited by H. T. Stainton. 
Pp. 153. With a coloured plate. London: John Van Voorst, Pater- 
noster-row. 1855. Price 2s. 6d. Second Edition, with considerable 
additions. 
“What are the additions?” will be the first question suggested by the 
above somewhat unlooked-for announcement of a second edition of the 
Annual. We shall at once supply the information by telling our readers 
that they consist of instructions for collecting, preserving, and arranging, 
lepidoptera and coleoptera, together with a few scattered notes of addi¬ 
tional localities, &c., of different species, and an “ Address to the Young 
Entomologists at Eton, Harrow, Winchester, Rugby, and at all other 
schools.” 
How the necessity arose for publishing this edition we shall allow the 
author to explain in his own words— 
“ The enthusiastic reception which t The Entomologists’ Annual’ has 
