Remarks on the Physiology of the Ege. | 369 
The particular arrangements of other Antrim mountains, 
and their local circumstances, lead us to the very same con- 
clusion. 
Were we from these data to generalize, and, calling in 
the aid of analogy, to pronounce ad/ mountains to be similar 
to those of dnirim, wust we not form the general con- 
clusion, 
That the mountains of the world were not formed, but 
deft behind,—not the stupendous constructions of mighty 
agents,—but the scattered remnants of a diminished world? 
Moy, Ireland, May 12, 1811. » Wis RICHARDSON, D.D. 
LXIV. Some Remarks onthe Physiology of the Egg: com- 
municated ina Letter from Joun Aygron Paris, M.B.to 
WiuraM Georce, Maton, M,D.4.PLS. Se. Se* 
Dear Sir, Tue extensive range which, the. ovipari form 
in the scale of animated, existence renders the physiology 
of the egg a subject ofjextragrdinany, interest and, improtance 
to the disciple of Linnzeus.: J am, therefore induced to hope 
that the communication of any new facts relative to its or- 
ganization and development will be received by you as an 
acceptable tribute to the cause,of natural history. 
The ova, or germs of, oviparous animals, admit of an 
evident division into two orders. J. The Perfect, and II. 
the Imperfect. The former are deposited by the aves, ser- 
pentes, and by most,,eviparous; guadrupeds, and are com- 
pletely formed in utero ,svhilst. abe, latter, produced by 
some of the festacea,,amphibiayiandhy. most pisces, acquire 
additions after their, exclusions, .The observations con- 
tained in this memoingrelate, more particularly to the class 
aves, the history of whose ova comprehends whatever is 
interesting or important in the germs, of inferior animals. 
The egg, when completed and deposited, consists of the 
following parts : 
1. Vitellus or yolk, with its capsule and cicatricula ; 
2. The two allumina, with their proper membranes; 3. The 
chalaxe; 4. The folliculus aéris ; 5. The common mem- 
branes; 6. The exterior involucrum, or shell. 
_ The necessity of any description of these parts is super- 
seded by the minute and valuable details which are to be 
found in the works of Fabricius ab Aquapendente, Harvey, 
Malpighi, and of many modern and enlightened. physio- 
* From the Linnean Transactions, vol. x. 
Vol. 37. No. 157. May 1811, Aa logists ; 
