890 ZOOLOGY 



movable eyelids : Colubridce (276) ; Elapidce (277) ; Crotalidce (277). 

 CRQCODILINA, large reptiles, with longitudinal vent (279). 



AVES. Feathered Vertebrates. CUKSORES, Aves with keelless 

 sternum (307). NATATORES, swimming birds (305). GRALLATORKS, 

 wading birds (305). GALLINACEI, large ground birds with strong, 

 perching feet and flat nails (304). COLUMBINE, short cloven feet and 

 compressed nails (303). SCANSORES, birds with powerful beak and 

 feet adapted for climbing (299). CYPSELOMOPH^:, cereless birds, with 

 scaleless metatarsus (301). PASSERES, birds whose metatarsus is 

 covered with laminae or scales, usually with singing apparatus : Tyran- 

 nidce (295) ; Alaudidce (295) ; Corvidce (294) ; Icteridce (293) ; Fringil- 

 /iW(284); Tanagridce (292); Hirudinidce (292); Ampelidce (291); 

 Laniidce (289) ; Vireonidce (288) ; Mniotilidce (287) ; Troglodytidce 

 (287); Certhiidce (286); Paridce (286); Sylviidce (285); Turdidce 

 (285). RAPTORES, birds with cere, hooked bill, and strong, hooked 

 claws (298). PSITTACI, birds with cere, high, hooked beak, and 

 fleshy tongue (parrots, 297). 



MAMMALIA. Vertebrates which nourish the young by means of 

 milk, and are usually covered with hair. MONOTREMATA, oviparous 

 mammals (321). MARSUPALIA, provided with a marsupium (322). 

 EDENTATA, teeth either absent, rudimentary, or without enamel (323). 

 CETACEA, marine hairless mammals, hind limbs absent (324). UNGU- 

 LATA, hoofed mammals : even-toed ungulates (326) ; odd-toed ungu- 

 lates (327); elephants (327). RODENTIA, canines absent, incisors 

 grow continuously through life (320). CARNIVORA, canines large 

 (328). INSECTIVORA, small, terrestrial, carnivorous mammals, with 

 small canines (327). CHEIROPTERA, mammals with flying membrane 

 between elongated digits (329). PRIMATES, with hands (329). 



