The THIRD PART, contained in the second volume, is entitled, "Embryology of the Turtle." It consists of two chapters: "Development of the Egg, from its first appearance to the formation of the embryo." "Development of the Embryo, from the time the egg leaves the ovary to that of the hatching of the young." Then follow the explanation of the plates and the plates themselves, thirty-four in number.
We need not attempt to give any account of the parts devoted to the development of these particular subjects. 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. The principles of classification exemplified, the methods of description illustrated, the rules of nomenclature tested,--what matter is it whether the _gran maestro_ has chosen this or that string to play the air upon, when each has compass enough for all its melody?
Still more forcibly does this comment apply to the elaborate and ample division of the work embracing the Embryology of the Turtle. He who has mastered the details of this section has at his feet the whole broad realm of which this province holds one of the key-fortresses. _Ex testudine naturam_.
We are unwilling to speak of the illustrations comparatively without more extended means of judgment than we have at hand. But that they are of superlative excellence, brilliant, delicate, accurate, life-like, and nature-like, is what none will dispute. Look at these turtles, models of real-estate owners as they are, Observe No. 13, Plate IV.,--"Chelydra Serpentina,"--"snapper", or "snappin' turtle," in the vernacular. He is out collecting rents from the naked-skinned reptiles, his brethren; in default thereof, taking the bodies of the aforesaid. Or behold No. 5, Plate VI., bewailing the wretchedness of those who have no roofs to cover them. Or No. 2, of the same plate, bestowing an archiepiscopal benediction on the houseless multitudes, before he retires for the night to slumber between his tessellated floor and his frescoed ceiling.
