PHYSETEROIDEA. 57 



2. SWINHOIA. 



Swinhoia, Grayj I. c. p. 382 ; Synops. Whales ^ Dolph. p. 3. 

 The lower lateral processes of the third to the sixth cervical verte- 

 brae slender, regularly curved, without any prominent angle on the 

 lower edge. 



1. Swinhoia cMnensis. B.M. 



Balsenoptera Swinhoei, Gray, I. c. p. 382, figs. 88-93. 

 Swinhoia chinensis, Gray, Synops, Whales 8f Dolph. p. 3. 



Inhab. Formosa. 



Section II. DENTICETE (cf, p. 35). 



Denticete, Gray, I. c. pp. 0)2, 194 ; Synops. Whales 8f Dolph. p. 3. 

 Odontoceti or. Delphinoidea, Flower, /. c. p. 111. 



Teeth well developed in one or both jaws, sometimes deciduous. 

 Palate without baleen. Head large or moderate, compressed. Tym- 

 panic bones two, dissimilar, separate, becoming united, sunk in a 

 cavity in the base of the skull. Gullet large. 



The suborders in this section have certain relations to each other 

 by which they may be arranged in two parallel series : — 



Teeth only in the lower jaw. Cer- 

 vical vertebra} often united 



Teeth well developed in both jaws. 

 Jaws beaked 



A. Nostrils separate, 

 elongated. 



Physeteroidea. 

 Susuoidea. 



B. Nostrils united, 

 transverse. 



Ziphioidea. 

 Delphinoidea. 



Division I. Nostrils longitudinal, parallel or diverging ; each covered 

 ivith a valve (cf. p. 62). 



Suborder III. PHYSETEROIDEA. 



Physeteroidea, Gray, I. c. p. 195 j Synops. Whales Sf Dolph. p. 3. 

 Physeteridse (Physeterinse), Flower, Tr. Zool. Soc. vol. vi. p. 113. 



Head blunt. Nostrils longitudinal, parallel, or diverging, each 

 covered with a valve, the right often obliterated. Teeth many in 

 the lower jaw, fitting into holes in the gums of the upper one. 

 Lachrymal bone none distinct. " Costal cartilages not ossified. The 

 hinder ribs losing their tubercular and retaining their capitular ar- 

 ticulation with the vertebrae. The greater number of the cervical 

 vertebrae ankylosed together. Pterygoid bones thick, produced 

 backwards, meeting in the middle line, and not involuted to form 



