ZOOLOGY. 629 



Fa HI. 1. Infusorial Reptiles, Petromyzoid Caudate 

 Batrachia, Salamanders. 



Body naked and furnished with a tail. 



These cylindrical animals bear the greatest resem- 

 blance to the Lampreys, or are Petromyzoid, being 

 provided with setaceous and scarcely discernible teeth, 

 frequently only one pair of feet ; they are developed also 

 out of spawn in the water, and many retain the branchiae 

 during the whole of life. 



Fam. 2. Polypary Reptilia, Kugelfischartige Stutz- 

 kroten, Frogs. 



Body thick and naked and without a tail, but with 

 four feet. 



The Frogs and Toads proper are likewise developed 

 out of spawn, but soon lose their branchiae. In their 

 form and even the structure of their mouth they are 

 Kugelfischartige, i. e. remind us strikingly of the Globe- 

 fishes, among the Engmaulern or Plectognathi. 

 Fam. 3. Acalephan Reptilia, Welsartige Chelonia. 



Body thick and coated with scales, maxillae quite 

 edentulous. 



The Chelonia appear certainly to occupy a pretty high 

 rank ; they lay large ova covered with a calcareous shell, 

 but frequently live or dwell in the water, and have, in 

 their mode of living as well as form, a striking resem- 

 blance to the naked Batrachia. Through their want of 

 teeth they range among all the succeeding families. 



Order 2. Conchozooid Eeptilia Opliidia. 



3544. Body cylindriform and scaly, teeth acuminate, 

 tongue longitudinally bifid and inclosed within a sheath ; 

 no feet and eyelids. 



The Serpents stand without doubt below the Lizards ; 

 yet it is difficult to arrange them properly into families. 

 The poison-teeth appear to indicate a lower character, 

 because the cranium is thereby removed or recedes from 

 the usual type of structure, while the superior maxilla 

 becomes very much arrested. But as there are moveable 

 and immoveable poison-teeth, and the latter gradually 



