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The sixth and last section is devoted to Embryological systems, and presents diagrams of the classifications of Von Baer, Van Beneden, Koelliker, and Vogt. The second part of the Monograph introduces us to the consideration of a special subject of Natural History, the North American Testudinata.
They are evidently not wantonly destructive; they act only under the influence of hunger, and even then their motions on land are awkward and ungainly, their action timid, and their whole demeanour devoid of the sagacity and courage which characterise other animals of prey. TESTUDINATA. Tortoise.
The Third Part exemplifies the bearing of Embryology upon these general questions, while it contains the fullest illustration of the embryonic growth of the Testudinata." The Preface closes with honorable mention of the gentlemen who have furnished direct assistance in the preparation of the work, and especially of Mr. Clark in microscopic observation and illustration, and of Mr.
The First Part contains an exposition of the general views I have arrived at thus far, in my studies of Natural History. The Second Part shows how I have attempted to apply these results to the special study of Zoology, taking the order of Testudinata as an example.
This we must necessarily leave to the journals devoted to scientific matters, and the class of students most intimate with these departments of Natural Science. Yet the American who asks for a model to work by in his investigations will find a great deal more than the "North American Testudinata" in the part to which that title is prefixed.
Would not Doctor Darwin have rejoiced greatly, if he could have brought to the support of his theory the observation of our own great naturalist, Agassiz, who, knowing the savage snap of one of the large, full-grown Testudinata, is said to have asserted, that, under the microscope, he has seen the juvenile turtle snapping precociously in embryo?
As it stands, the "Contributions to the Natural History of the United States" consists of four large quarto volumes. The first two are divided into three parts, namely: 1st. An Essay on Classification. 2nd. The North American Testudinata. 3rd. The Embryology of the Turtle, the latter two being illustrated by thirty-four plates.
The juggler snakes have the peculiar power of inflating the skin of the neck till it bulges over the head, and so forms a kind of hood. The Indian varieties of these hooded snakes are poisonous, and are distinguishable from the others by a yellow spot on the back of the neck. From the serpents the visitor should turn to the families of the Testudinata, or
We see that one of its three parts embraces the largest generalities of Natural Science, under the head of an "Essay on Classification." We see that the other two parts are devoted to the description and delineation of a single order of Reptilia, the Testudinata, or "Turtles." If Mr.
No sooner did we just now appear on the edge of the wood than this animal of the order Testudinata modestly withdrew. He knew he was no match for us. But how many of the human race are in the habit of projecting their heads into things for which they have no fittedness! They thrust themselves into discussions where they are almost sure to get trod on.
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