334 
Reports and Proceedinys. 
3. “ On the Remains of Hypsodon, Portlieus, and Ichthyodectes 
from British Cretaceous strata, with descriptions of new species.” 
By E. Tulley Newton, Esq., F.G.S., of H.M. Geological Survey. 
Hypsodon lewesiensis, as established by Agassiz in the “ Poissons 
Fossiles,” it appears, includes two forms which are generically 
distinct, and the author feit justified in adopting Prof. Cope’s Sug- 
gestion for their Separation. It is proposed to retain the above 
narne for the specimen upon which the genus and species was really 
founded, and to refer to the genus Portheus (Cope), the upper jaw, 
with large -irregulär teeth, which had already been described by 
Dr. Mantell in 1822 as “ an unknown fish.” To this the specific 
name of P. Mantdlii is to be given. Another maxillary bone from 
the Lower Chalk, characterized by its greater proportionate depth, 
and the convexity of its dentary border, as well as by the more 
equal size of its teeth, it is proposed to name P. Daviesii. 
A very fine specimen from the Gault belonging to this same 
genus was described in detail. This fish is closely allied to P. lestris 
(Cope), but differs in the form of its maxilla and premaxilla, and is 
chiefly remarkable for the peculiar incurving of the points of the 
mandibular teeth. The parts of this specimen which are preserved 
are — both upper and lower jaws, parts of the palato-quadrate arch, 
of the hyoid bones, ethmoidal region, brain case, etc. Portheus 
gaultinus is the name suggested for this species. 
Hypsodon minor (Egerton), figured in Dixon’s “Fossils of Sussex.” 
will now, it is thought, on account of the regularity of its teeth, 
have to be placed in the genus Ichtliyodecte s (Cope). 
Another small mandible from the Lower Chalk of Dorking, which 
is distinguished by the regularity of its slender, incurved, and 
oblique teeth, it is proposed to call Ichthyodectes eJegans. 
4. “On the Precarbouiferous Rocks of Charnwood Forest.” Part I. 
By Rev. E. Hill, M.A., F.G.S., and Rev. T. G. Bonney, M.A., F.G.S. 
The authors described a mass of slates, grits, and volcanic brec- 
cias, accompanied by some knolls and dykes of Syenite, spread over 
a space of about 50 square miles. Tliey showed that the patches 
marked on the Survey Map as Greenstone of Bardon, Birchwood, 
and Buck Hill, except a very small portion of the latter, are really 
altered rock; that the Syenite knoll of Bawdon Castle carries a mass 
of breccia in its centre ; and that the area of the Syenite in Bradgate 
House Woods must be enlarged. 
Several writers have noticed that part of the porpliyritic region of 
the north-west corner is altered rock. The authors showed that 
there is in it no igneous rock at all, and that the same is the case 
with every one of the smaller patches marked as porphyry on the 
Survey Map. All are volcanic breccias, asbes, or agglomerates, 
some of enormous size. The extent to which volcanic materials 
enter into the rocks of the district is remarkable. 
The authors endeavoured to correlate the stratified rocks, and 
adduced evidence to prove that the pebble and asli-beds of Forest 
Gate, the grit and pebble-beds of the Hanging Rocks, the similar beds 
in the grounds of A. Ellis, Esq., at Swithland, and the quartzites of 
Bradgate Stahle Quarry, Groby Pool, and Steward’s Hay Spring, 
