148 
various degrees of consistence, from the fluid naphtha 
and mineral oil or petroleum, to the solid asphalt and 
jet or pitch coal; the elaterite or elastic bitumen of 
Derbyshire, (a suite of specimens exhibiting all de¬ 
grees of solidity, from that of honey to that of a com¬ 
pact ligneous substance; with which is also placed the 
dapeclie , an inflammable fossil substance found by 
Humboldt in South America, having several properties 
of the common caoutchucor Indian rubber;)—-the hat- 
chettine , a bituminous substance from Merthyr Tydvil 
in South Wales.—Coal: black coal , and brown coal—oi 
these a few specimens only are placed in glass Case 62, 
their different varieties being rather objects for a geo¬ 
logical collection. 
The arrangement of the secondary fossils in this 
Gallery is proceeded with as expeditiously as circum¬ 
stances will admit. Several upright glazed cases are 
fitted up for the Class Reptilia, comprising osseous 
remains of the Batrachian, the Chelonian, the Emydo- 
saurian, and the Enaliosaurian Orders. The objects 
already deposited belong chiefly to the two last men¬ 
tioned natural orders, the first of which is divided into 
the families of the Crocodiles and the Iguanas. Among 
the specimens under arrangement the following may be 
specified:—a species of gavial (now considered a dis¬ 
tinct genus bearing the name of ^Eolodon) from the lias 
at Monheim in Franconia, being the unique specimen 
described and figured by Soemmerring in the Memoirs 
of the Academy of Munich, under the name of Croco- 
d i lu s prisons ;—a portion of the head, with the snout, &c. 
of a gavial (Teleosaurus Chapmanni) from Whitby, 
which, though correctly determined by its discoverer, 
Capt. W. Chapman and also by Wooller (Phil. Trans, 
for 1758), was subsequently mistaken for a species of 
Ichthyosaurus;—a head of Crocodilus Toliapicus , 
probably the same which is mentioned by Cuvier as 
Crocodile de Sheppy ;—the head and other parts of 
the Geosaurus (the Lacerta gigantea of Soem¬ 
merring) found together with the preceding, and first 
figured 
LONG 
GALLERY. 
Nat. Hist. 
