SCIENTIFIC SUIMJMAEY. 
243 
the texture of a sponge, or envelop Foraminifera, so-called Xantliidia, and 
other minute organisms with their hazy shroud. Mr. Woodward considers 
that the hands in flint are produced by infiltration of mmeral matters. “ All 
kinds of siliceous pebbles derived from gravel beds are more or less affected 
by agencies to which those beds have been subjected, and especially they 
are liable to be stained by the penetration of water charged with iron or 
manganese, which has produced coloured zones and dendritic infiltrations in 
the most compact jaspers and agates, as well as in the more permeable flints 
derived from the waste of the chalk formation.” Mr. Woodward’s paper is 
accompanied by several beautiful illustrations representing sections of various 
specimens of banded flints, some of which may be seen in the British IMuseum 
collections. — Vide Geological Magazine, No. IV. 
The SJcin of Re]ytiles in the Fossil State. — There has been lately obtained 
for the British Museum, from Barrow-on-Soar, Leicestershire, a specimen of 
Ichthyosaurus tenuirostris, showing upon the surface of the slap a large 
extension of the dermal covering. It seems to indicate from the outline 
that these reptiles had a prominent ridge upon the dorsal surface, similar in 
api^earance to that which the male of the 2 ^ond-ne^vt presents in the spring. 
A Perfect Cranium of the Mammoth has been found, for the first time in 
this country, near Silsey, Chichester. The specimen was discovered by Avork- 
men at a depth of fifteen feet from the surface. The skuIL must have be- 
longed to an aged individual, for the first pair of molars are not only external, 
but have been considerably worn in the process of mastication. Of the 
upper molars eighteen laminae remain, eleven of which have been used ; 
several of the front laminae having been worn entirely away. The entire 
right tusk had been detached, with a portion of the socket, before it had been 
enveloped in the sands and brick-earth ; for, it was found upon the same 
level in the pit, but at a distance of nearly twenty feet from the cranium to 
which it belongs. The tusks measure (on the outer curve) 8 feet 8 inches 
from the apex to the insertion in the socket ; the inserted portion measuring 
about 18 inches. — Vide Geological Magazine for NoA^ember. 
Neiv Mammalia from the Red Crag. — Mr. E. Ray Lankester, Avhose 
discovery of a new fossil hyaena Avill be found recorded in our third volume, 
has announced the discovery of several new species of mammals from the 
Red Crag. The specimens from an examination of which this gentleman has, 
concluded the presence of several forms new to science, are those in the 
collection of W. Whincop, Esq., of Woodbridge, Suffolk, and consist mainly 
of teeth. The following neAv species have been described (so far as the teeth 
are concerned) by Mr. Lankester : — Castor veterior, Delphinus iincidens, D- 
orcoicles, and Canis primigennis. As an example of the difficulty of identi- 
fying strata by the nature of their organic remains, the writer eijumerates 
the following representatives of nine dffierent faunse which present them- 
selves in the Red Crag : — (1.) Upper Greensand fossils in considerable numbers, 
portions of Ammonites, Terebratulss, Saurian teeth and bones, &c. (2.) Chalk 
fossils represented by flints containing Sponges and Echinoderms. (3.) 
Fossils from the lowest Eocene beds, the Thanet Sands. (4.) Nodules, the 
so-called “ Coprolites,” and very numerous remains of fish, Crustacea, and 
(much more rarely) reptiles and mammals derived from the London clay. (5.) 
The teeth of Carcharodon heterodon, and portions of Edaphodon from middle 
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