Mr. J. F. Walker on Lower-Greensand Fossils, 3I 
of the cthers. Dorsal fin above the middle of the interspace 
between the root of the ventral and anal, somewhat nearer to the 
latter. Anal low, scaly, anterior rays imbedded in fat. Caudal 
short, rounded. The pectoral extends somewhat beyond (in C. 
scombroides not quite to) the vertical from the origin of the 
dorsal, its length being one-third of the total without caudal 
(in C. scombroides rather less than two-sevenths). Ventrals well 
developed. A small black spot on the root of the lower pectoral 
rays. The humeral spot and one on the adipose fin are present, 
as in C. scombroides. 
Seven inches long. 
VIII.—On the Fossils contained in a Lower Greensand Deposit 
of Phosphatic Nodules in Bedfordshire. By J. ¥, Watxer, 
F.C.S., Sid. Suss. College, Cambridge. 
Tue increasing demand for phosphatic manure has led to the 
opening, a short time since, of new workings for the extraction 
of nodules containing earthy phosphates, near Sandy, in Bed- 
fordshire. A short account of this deposit was communicated 
by the Rev. P. B. Brodie to the ‘Geological Magazine,’ and 
published in that journal for April last. The deposit is referred 
to the Lower Greensand; but nearly all the fossils contained in 
it have been derived from the wreck of preexisting formations, 
Mr. Brodie mentions an imperfect cast of a species of Rhyn- 
chonella as the only fossil of animal origin observed by him 
which appeared to belong to the bed; I have obtaimed a species 
of Corbis, nearly allied to Corbis corrugata, Sby. of the Lower 
Greensand of the southern counties, and have seen a species of 
Terebratula, both presenting precisely the aspect of Lower 
Greensand fossils, and exhibiting no traces of having been rolled. 
Of the introduced fossils, the greater part appear to have been 
derived from the Kimmeridge Clay. Among these are casts of 
the interior of species of Cardium and of two other bivalves, and 
of a large Pleurotomaria, much worn,—several fragments of the 
dorsal spines of Asteracanthus ornatissimus and a small portion of 
a spine of Hybodus,—numerous palatal teeth of Spherodus gigas, 
and a single curved palatal tooth of Pycnodus. Several teeth of 
Phosaurus and some teeth of apparently crocodilian character 
also occur. 
The Oxford Clay has furnished four species of Ammonites, and 
a phragmocone of a Belemnite ; and several vertebree and teeth of 
Ichthyosaurus and Plesiosaurus are also probably derived from this 
formation. 
But the most interesting point that I have ascertained with re- 
