CLASS I. MAMMALIA. 



THE Scandinavian mammalia may be divided into the follow- 

 ing orders : 



I. Extremities armed with claws. 



a. With three kinds of teeth incisors, molars, and 

 canines. 



1. With extremities formed for flying. Cheiroptera. 



2. With extremities formed for walking nose elongated 



to a pointed snont ; molars all alike, with several 

 points . Fossores . 



3. With extremities formed for walking molars of three 



kinds. Ferce. 



4. With extremities formed for swimmingmolars of 



one kind. Phocacece. 



b. With only two kinds of tedth, canines wanting. 



5. Incisors -f, long, curved, and sharp-edgedmolars all 



alike. Rodentia. 



II. Extremities furnished with hoofs. 



6. Non-ruminants. Pachydermata. 



7. Euminants. Ruminantia. 



III. Extremities furnished with fins. 



8. Body naked, formed with horizontal tail-fin,- Cetacea. 



