VERTEBRATA (CHORD ATA). 109 



atomische Untersuchung des Orycteropus Capensis, Stuttgart, 1837 ; Owen, 

 Memoir on the Megatherium, 1860 ; Murie, On the Habits, Structure, and 

 Relations of the Three-banded Armadillo, Trans. Linn. Soc., 1872 ; Owen, 

 On the, Anatomy of the Great Ant-Eater, Trans. Zool. Soc., 1856-57.) 



ORDER II. SIRENIA. 



Fam. Manatidee (Sea-cows). Manatus (Manatee), Hali- 

 core (Dugoug), Rliytina (extinct within the histori- 

 cal period), *Halitherium. 



(Murie, Form and Structure of the Manatee, Trans. Zool. Soc., 1872 ; 

 Owen, Anatomy of the Dugong, Proc. Zool. Soc., 1838.) 



Fig. 97. Sirenia. Skeleton of the Manatee (Manatus American-its). 



ORDER III. CETACEA. 



Sub-ord. 1. Mysticeti. 



Fam. Balsenidte. Balcena (Eight Whale), Balce r aoptera 

 (Eorqual). 



Sub-ord. 2. Odontoceti. 



Fam. a. Catodontidse. Physeter (Sperm-whale). 



Fam. &. Delphinidse. Delphinus (Dolphin), Phoceena 



(Porpoise), Platanista. 



Fam. c. Monodontidse. Monodon (Narwhal). 

 Fam. d. Ehynchoceti. Ziphius, Hyperoodon. 

 Fam. e. ^'"Zeuglodontidse. Zeuglodon, Sgualodon. 



(F. Cuvier, Histoire naturelle des Cetace's, Paris, 1836 ; Eschricht, Unter- 

 suchungen iiber die nordischen Walthiere, Leipzig, 1849 ; Gray, Synopsis of 

 the Species of Whales and. Dolphins in the British Museum, 1868 ; Flower, 

 Notes on the Skeletons of TVhales, Proc. Zool. Soc., 1864.) 



