ROLL CALL ,,- 



Class IV — Mammalia — Mammals. 



Characteristics: Members of this class are readily distiiiKuisl)0(l by a 

 covering of hair at some time in their existence; the females pos.seKs 

 mammary glands which secret(> milk for nourishment of young. 



Subclass A — Prototheria — Monotremes {Echidna and Ornithorhynchus). 

 Characteristics: Egg-laying mammals; in case of Ecliidim the egg is 

 placed in a temporary pouch and incubated until hatched. 



Subclass B — Metatheria — Marsupials {Didelphys, Petrogale, Macropus). 

 Characteristics : Carry young in marsupium or pouch ; allantoic placenta 

 typically absent. 



Subclass C — Eutheria — Viviparous mammals. 



Characteristics : Bring forth their young alive ; young never carried in 

 pouch ; nourished before birth by placenta. 

 section a — unguiculata — Clawed mammals. 

 Order 1 — Insectivora — Insect-eaters, moles, and European hedgehogs. 



Characteristics : Small terrestrial clawed mammals with typically planti- 

 grade feet ; molar teeth enameled, rooted, and tuberculate. 

 Order 2 — Dermaptera — Flying lemurs. 



Characteristics: Members of this group resemble the insectivores in the 

 structure of the skull and the canine teeth ; only two genera are known, 

 which inhabit the forests of Malaysia and the Philippines. 

 Order S — Chiroptera — Insectivorous bats, fruit-bats, and blood-sucking vam- 

 pires. 

 Characteristics : Mammals with claws whose fore limbs are modified for 

 flight. 

 Order 4 — Carnivora — Flesh-eating mammals, hyenas, raccoons, dogs, cats, 

 weasels, bears, sea-lions, seals, and walruses. « 



Characteristics : Carnivorous mammals with claws and large projecting 

 canine teeth; incisors small; premolars adapted for flesh-cutting. 

 Order 5 — Rodentia — Gnawing animals, hares, rats, mice, squirrels, beavers, 

 porcupines, guinea pigs. 

 Characteristics : Members of this group are usually separated into two 

 suborders depending upon the possession of one or two pairs of incisors 

 in upper jaw. 

 Order 6 — Edentata — So-called toothless mammals, three-toed sloth, armadillo, 

 and pangolin. 

 Characteristics: Clawed mammals; teeth entirely absent or mi.-^sing 

 from anterior part of jaw ; teeth usually without enamel ; tongue often 

 long and protractile. 

 section b — primates. 



Order 7 — Primates — M&mmaAs with nails; tarsiers, lemurs, monkeys, apes, 

 man. 

 Characteristics: Toe or thumb usually is opposable to other digits; 

 dentition rather primitive ; eye orbits directed forward ; posture usujilly 

 semierect. 



