ZOOLOGY. 643 



roots and grains Spalax, Rat, Common and Field-mouse, 

 Beaver ; mostly only three molars. 



Fam. 2. Polypary Thricozoa Klettermause. 



Eyes, ears, and tail large, the latter being stiff and 

 hairy, claws pointed ; live mostly upon trees, eating nut- 

 kernels and fruit ; usually four molars Squirrels. 



Fam. 3. Acalephan Thricozoa Lcuifmause. 



Eyes and ears large, tail hairy, hind feet longest, 

 claws obtuse, lamellar or plicated teeth ; live upon the 

 surface of the earth and eat grass Hares and Guinea- 

 pigs ; mostly more than four molar teeth. 



Order 2. Ader-, Geschlechts, Schalthier-Haarthiere 

 Kaumduse. 



3568. Teeth and toes deviating completely from those 

 of every other order ; nor in a less degree the method of 

 propagation. 



In some instances all the teeth are wanting, in some 

 they exceed the ordinary number, and are quite uniform ; 

 sometimes the lateral teeth only are similar, but in this 

 case there are no canines and incisors ; or else there are 

 canines with more than six incisors, or also with rodent 

 teeth. 



In like manner the toes are irregular ; the one kind 

 being disproportionately large and the other absurdly 

 small; some are for the most part wholly connate; in 

 many cases there are hands posteriorly. The claws also 

 are in some instances obtuse, in others sharp for climbing, 

 or else asymmetrically large and unciform. Hands 

 adapted for swimming or flight also occur. 



Finally, the sexual parts are quite aberrant, being 

 mostly very large and singularly formed ; the mamma3 

 frequently lodged in a pouch, or at least furnished with 

 marsupial bones. The young are born as naked and im- 

 moveable embryos, and suckled for a very long time. 



Ah 1 this reminds us of the Conchozoa or Shell-animals 

 as doth also their unusual covering of belts, scales, spines 

 and long hairs. 



Fam. 4. Mussel-like Thricozoa, Sloths. 



Lateral and canine teeth equal in size and obtuse, in- 



