PHYSETEHOIDEA. Ot 



2. SWINHOIA. 



Swinhoia, Gray, I. c. p. 382 ; Synops. Whales 8f Dolph. p. 3. 

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

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

 lower edge. 



1. Swinhoia chinensis. B.H. 



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

 Swinhoia chinensis, Gray, Synojis. Whales c)- Dolph. p. 3. 



Inhab. Formosa. 



Section II. DENTICETE (c/. p. 35). 



Denticete, Gray, I. c. pp. 62, 194 ; Synops. Tlliales # Dolph. p. 3. 

 Odontoceti or Delphinoidea, Flower, I. 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 

 with a valve (cf. p. 62). 



Suborder III. PHYSETEROIDEA. 



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

 Physeteridas (Physeterinae) , 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 vertebras. The greater number of the cervical 

 vertebras ankylosed together. Pterygoid bones thick, produced 

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



