80 
TUE GEOLOGIST. 
Zehellii, n. s. ; Ealeotis ? aniiqua, n. s, ; Emarginula Kajopi, n. s. ; Ac- 
icon cinctiis, n. s. ; Acteonella, sp. 
All these, it will be seem, are new, except about a dozen described or 
quoted by Goldfuss, Hoeninghaus, Bosquet, and De Eyckliolt. 
This fauna M. Binkhorst considers as belonging to the zone between 
higli and low water in a littoral region of a subtropical ocean. Many of the 
genera Avhich compose it are common to hot and to temperate seas, such 
as the JBuccinum, Turho, Emarghiula, Scalaria, etc. ; but others, such as 
tbe YoJula, Pyrula, Cancellaria, Solarium, Vermetus, Turhinella, etc., 
onl}^ inhabit the hot seas. The facies of the fauna indicates also, he thinks, 
the proximity of reefs of corals, great quantities of the debris of antliozoa- 
rians so fill many of the beds as almost to form them. It is probably to 
the high temj)erature of this epoch, he considers, that we owe the great 
species Voluta deperdita, Cerithium maximum, and those brilliant colours 
which many of the bivalves that he has found, have even in their ancient 
burial-place. 
"Judging," he adds, "from the great number of fragment of casts and 
moulds belonging to species of which the determination and the descrij)tion 
await the discovery of more perfect examples, those that we have de- 
scribed represent only a small portion of the mollusks of this class which 
were the contemporaries of the Mosasaiirus." 
He has also described a cephalopod, characteristic of the " marnes sans 
silex de Vaels," a score of species of cephalopods from the Uj)per Chalk, 
some of which are new, and among others many of the genus Aminonites, 
probably the last representatives of that important and numerous family, 
and one species of the AcaniJiotciithis, D'Orb., which with the AcantJioteu- 
this prisca of Solenhofen are the only fossil species known to M. Bink- 
horst as described up to this time, and this the only one of the cretaceous 
rocks. In England however an Acanthoteuthis {A. antiquus) is recorded 
from the Oxfordian beds of Christian Malford and from Trowbridge in 
Wiltshire. 
It is not a little singular however to find these remains of Gasteropoda 
occurring in the hard beds of the Limboiirg district, in the form of casts 
and moulds, exactly as the remains of Gasteropoda do in those hard beds 
of the English white chalk to ^ hich Mr. Whitaker has lately given the 
name of Chalk-rock. 
The great number of new species figured by M. Binkhorst should be an 
encouragement to the many British collectors of cretaceous fossils, to search 
well these hard beds for the Gasteropoda, of which in the form of casts they 
do, as we know personally by experience, contain great quantities. 
In the beds of this hard chalk at Dover or Maidstone, a cubic foot of 
rock cannot be broken up without some casts of what appears to be an 
exquisitely sculptured Trochus being found. Dentalia also are common, 
and small (young ?) Ammonites. We hope soon therefore to see M. Binck- 
horst's species matched by English examples, and some new forms added 
to them from our own famous chalk localities. 
