58 Abstracts of Foreign Memoirs. 
by Blainville, which belongs to quite another part of the series of 
strata. The phragmocone is as yet undiscovered. If a considerable 
number of specimens be examined, including varieties of figure— 
club-shaped, fusiform, and subcylindrical,—there will appear enough 
of resemblance to the guard of Xiphoteuthis to suggest the pro- 
bability that the phragmocone might be slender and elongate as in 
that fossil. The same idea has, indeed, already been expressed by 
Quenstedt (‘Der Jura’) in reference to Bel. clavatus, Blainv., a 
fossil rather common in the Lias, and which is probably identical 
with Bel. pistilliformis of Sowerby. Quenstedt expressly proposes 
to join Orthoceratites elongatus of Dela Beche, which was unprovided 
with a guard, with Bel. clavatus, still deficient of a phragmocone. 
And, in addition to the English example of that phragmocone from 
Lyme, he figures (‘ Der Jura,’ pl. 17, fig. 9) another, having similar 
general characters, from the Lias of Heckingen. It occurs to me to 
suggest that, by renewed search among the many existing collections 
of Belemnites from Lyme, some sure indications of the phragmocone 
of Bel. clavatus may yet be discovered, which may support or dis- 
prove the conjecture here hazarded of the affinity of this species to 
Xiphoteuthis. I sought in vain for such indication among the 
specimens of Bel. clavatus which I lately obtained from the upper 
parts of the Lower Lias of the Yorkshire Coast. 
OxrorpD: Jan. 12, 1865. 
ABSTRACTS OF FOREIGIN MEMOIRS. 
——_4— 
Tun Rerations oF THE MrinerAt SprIncs or Ax AnD Lucnon, SouTHERN 
France, to Mrramorpuic Rocks AND Linzs or Fissure. By MM. L. Marin 
and F'. Garricou.* 
TT HIS very brief but important memoir is intended to point out, 
by reference to the facts in a single instance, the relation that 
exists in nature between thedirection of lines of Mineral Springs and 
the direction of systems of veins and recognized axes of elevation. 
‘The principle of parallel directions, applied with prudence in a 
region already geologically studied, may help to decide the age of 
the different disturbances which have determined the points of emer- 
gence, and therefore to class the Mineral Springs in natural geolo- 
gical groups, which, if this triple study be complete, would coincide 
with the grouping indicated by chemical analysis and medical 
observation.’ ‘These coincidences, therefore, are the tests of the 
theory. 
The groups selected are the Thermal Springs of Ax and Luchon 
in the Pyrenees. The authors show—/irsé, with regard to Ax, (A) 
that there are two classes of granitic rocks—1, fine- grained, with 
* Physique du Globe: Etude géologique sur les Eaux sulfureuses @’Ax (Ariége), 
et sur le groupe de sources auquel elles se rattachent : Note de MM. L. Martin 
et F. Garrigou, présentée par M. Daubrée. Comptes Rendus, Aug. 29, 1864. 
