216 
ADDENDA ET CORRIGENDA. 
along the hinge line : this arrangement, however, is not quite satisfactory, for in 
the typical species of Dalman’s genus Leptsena (L. rugosa, euglypha, &c.) I have 
never observed any trace of spines along the hinge line, but the margins of the 
valves are continued together, whereas in the species alluded to, L. sarcinulata, 
this character does not appear to exist ; there is also a different structure in the 
internal part of the ventral valve in these two groups. 
Atrypa sublohata. Forth Geol. Rep. t. 38. f. 2. d, e,f. — I had considered this 
reference as belonging to Ter. canalis of Murch. Sil. Syst., but Mr. Salter, who 
is well acquainted with the latter species, assures me it is distinct. I cannot 
however separate g-Jc of the same fig. from a species very common in the Glas- 
gow shales, and which I consider to be a variety of T. amhigua. 
Orthis Sharpei.—l have ventured to propose this name for a shell occurring in 
the carboniferous limestone of Kendal and Ireland, as a small tribute of respect to 
Mr. D. Sharpe, who has paid considerable attention to the fossils of the Paleeozoic 
series. It is figured under the name of 0. umbraculum, Forth Geol. Rep. t. 3/. 
f. 5, but is very distinct from the 0. umbraculum of Schlotheira, which I have had 
the means of verifying from a specimen kindly forwarded to me by Mons. de 
Verneuih 
Terebratula Lyra. — In the Catalogue, the T. costata of Hisinger has been con- 
sidered a synonym of this species ; but it is really distinct, and belongs to the 
Tereb. {Anomia) pectinata of Linnaeus, as pointed out to me by Mr. Sharpe. 
GASTEROPODA, 
CYRTOLITES, Conrad, Geol. Rep. New York, 1838. This name having the 
priority ought to be retained, in preference to that of Ecculiomphalus given by 
Fortlock. 
MAMMALIA. 
The age of the different beds containing the remains of Mammalia is perhaps 
not yet definitely settled ; the enormous quantity of bones of the elephant which 
are strewed over the bed of the English Channel and German Ocean is a curious 
and interesting phsenomenon. Similar remains, together with those of other 
Mammalia, are abundantly found in the cavern deposits of this country, as well 
as in other localities generally considered the result of diluvial or drift action ; 
they are, however, not less abundant in the regular stratified deposits occurring 
along the valleys of the principal rivers of England, and are there associated with 
numerous fluviatile Testacea, at present indigenous to this country, of which two 
or three species only are extinct, or inhabitants of more southern latitudes. 
The brown clay of Cambridgeshire is a superficial deposit of uncertain date, 
containing numerous mammalian remains, associated with fragments of fossili- 
ferous rocks, from the Lias to the Oxford Clay inclusive. 
