1868.] Amber; its Origin and History. 183 
and therefore to render accessible the stores of Amber which lie 
hidden in the interior of the country, will be the next progress in 
the acquisition of these, in so many respects, remarkable fossils. 
For the benefit of such students as desire to inform themselves 
more fully concerning the natural history of Amber, we append a 
list of the principal books and papers which have at various times 
been published on the subject ; and we also venture to illustrate 
the paper of our contributor with a plate, which will convey some 
idea of the organic remains usually found im this fossil resin. For 
the accuracy of the list of works, therefore, as well as for the second 
plate, the Editors of this Journal are responsible. ‘The specimens 
figured in that plate belong to the National Collection in the 
British Museum ; and for the facts relating to the Insects embodied 
in the annexed explanation of it, we are indebted to the kind and 
able assistance of Mr. Frederick Smith, of the Entomological De- 
partment of that Museum.—Eprrtors. 
EXPLANATION OF THE QUARTO PLATE. 
Fig. I. shows the north-western part of the coast of Samland. 
Fig. IL. is a section of the same line of coast. 
In both figures the tinted portions distinguish those places where the Tertiary 
beds crop out above the sea-level. The white portions are those where Quaternary 
or Postpliocene deposits only are visible. The principal divisions of the Tertiary rocks 
are distinguished by different lines. A signifies the deposit of the ‘ Glauconitie 
Sand”; B1 the Lower Stage, B2 the Middle Stage, and B 8 the Upper Stage, of 
the Browncoal-formation. The boundaries of the Synclinal 'Trougu, which the 
Sccond Stage fills up, are shown by dotted lines. 
Fig. III. exhibits vertical sections on a larger scale through three points on 
the north coast and three on the west. Here A distinguishes the deposit of the 
“Glauconitic Sand”; a, the “ Amber-earth”; b, the associated ‘ Quicksand ’; 
c, the “Green Sand’; d, the so-called ‘‘ White Wall”; e, the “Green Wall.” B -is 
the true Brown-coal formation ; also 1, the “ Quartz-sand’; 2, the intercalated clay- 
beds, which are represented on tlie west coast by three members, 2’, 2”, 2'”; 3, the 
Middle Clay-bed ; 4, the ‘‘ Striped Sand”; 5, the Lower Brown-coal ; 6, the Upper 
Clay-bed ; 7, “ Micaceous Sand”; 8, “Coal Sand”; and 9, the Upper Brown-coal. 
C, Diluvial deposits: —«, coarse sand, gravel, and large boulders ; 2, Marl; y, ordi- 
nary sand; 3, redeposited Tertiary sand ;—all these (« to 3) belong to the Older 
Diluvium; ; is the Younger Diluvium. 
Fig. IV. shows on a much larger scale than Fig. II. a small part of the coast 
near Warnicken, where the Tertiary beds are in great part denuded and replaced 
by Dilevium, exhibiting also the position of the Diluvial masses, The letters and 
numbers upon it have the same signification as in Fig. HI, 
EXPLANATION OF THE PLATE OF ORGANIC REMAINS FOUND 
IN AMBER. 
Fig. 1—A Dipterous Insect belonging to the European genus Leptis. Three 
times the Natural Size. 
Fig. 2—A_ Dipterous Insect belonging to the European genus Echinomyia. 
Enlarged one-half. 
