128 Scientific Intelligence. ¢ 
bryology a basis for determining the rank of species—succession it 
logical time a basis for deciding approximately upon rank ;—all of which 
topics, besides others not here enumerated, are so handle d as to bear di- 
rectly on the question of creation by physical agencies, giving it, a‘de- 
cided negative reply. 
Chapter II. Leading groups of the existing systems of animnaleail 
philosophical disquisition on the true significance of the grades of subdi- 
sions in the —- of life, the nature of species, genera, families, 
orders and clas: 
Chapter Il. "Sahin of the principal systems of zoology, including ob- 
servations on the systems of Aristotle and Linneus; the analomical sys- 
m Cuvier, Lamarck, Ehrenberg, Burmeister, Owen, vo n Siebold and 
others; the physio- philosophical systems of Oken and MLeny and the 
enbryological a of Déllinger, von Baer, vous etc 
Parr IL. rth American Testudinata. 
Cha ter J. The Order of Testudinata, its rank, classification, general 
es anatomical structure, geographical distribution, geological his 
cObatker If. The Families of Testudinata. 
Chapter III. North American genera and ae of Testudinata—their 
characters, a etc., for the co families 
Parr Ill. Embryology of the Tur 
soa gs Development of the ot a its first Sppearance to - 
ation 0} 
Chapter II. Dor tapaiens of the embryo from the time the egg leaves — 
the ovary to that of the hatching of the young, including the ng 
—the absorption of albumen into the yolk sac,—the transformations of — 
the yolk in the fecundated egg,—segmentation of the yolk,—the whole 
egg is the embryo,—foldings of the embryonic dise and successive stages 
of growth of the Turtle,—formation and pie po = the organs,—_ 
no ogy of the development of the em 
The young of various species and the several successive phases in em™- 
feralopreat’ development are acne with details in the plates, alo 
which are crowded full of fig . 
n another number, we prvpene to give an abstract of some of the views : 
brought forward in these volumes, 
IV. ASTRONOMY. 
. New Asteroids—The number of small planets already ioral 
betscn Mars and Jupiter is fifty. is 
ee was discovered ty Mr. N orman ew Oxford, oe Aug: — 
magni by Mr. James Fer ug0n, Washin D. Oc Oa. 4, 
. New Comets—The Fifth comet of rie was ee oy ir. 
Kifukerfaes Gottingen, Aug. 20,1857. In September red comet beea 
visible to the naked eye, and had a tail about 3° in lengt Po ae 
The Sixth comet of 1857 was discovered by Mr. iy ot Van Arsdale, ? 
Newark, N. J., Nov. 10, 1857. It appeared like a faint nebula. | 
