96 THE BRITISH MAMMALS PAST AND PRESENT. 



Balasna balaenopsis (Red Crag). 



Balasna insignis (Red Crag). 



Balaena rr^sticetus (Prehistoric and Existent in 



Arctic Ocean), Greenland Whale. 

 Balaena primigenia (Red Crag). 

 Palaeocetus sedgwicki (Boulder Clay). 

 Megaptera affinis (Coralline Crag and Red Crag). 

 Megaptera minuta (Coralline Crag). 

 Megaptera similis (Red Crag). 



54. Megaptera boops (Pleistocene and Existent), Hump- 



back Whale. 

 Balasnoptera borealina (Red Crag). 



55. Balaenoptera sibbaldii (Existent), Sibbald's Rorqual. 



56. Balsenoptera musculus (Pleistocene and Existent), 



Common Rorqual. 



57. Balaenoptera borealis (Pleistocene and Existent), 



Northern Rorqual. 



58. Balaenoptera rostrata (Existent), Lesser Rorqual. 

 Balaenoptera definita (Red Crag). 

 Balasnoptera emarginata (Red Crag). 

 Balaenoptera garopi (Red Crag). 

 Balaenoptera juddi (Middle Eocene). 

 Eschrichtius robustus (Pleistocene). 

 Cetotherium brevifrons (Red Crag). 

 Cetotherium brialmonti (Red Crag). 

 Cetotherium dubium (Red Crag). 

 Cetotherium hupschi (Red Crag). 

 Herpetocetus scaldiensis (Red Crag). 



ZEUGLODONTID&. 



Zeuglodon wanklyni (Upper Eocene). 



PHYSETERIDJS. 



59. Physeter macrocephalus (Forest Bed, Pleistocene, 



and Existent), Sperm Whale. 

 Kogia breviceps (Red Crag and Existent in Atlantic 



and Pacific), Lesser Sperm Whale. 

 Physeterula dubusi (Red Crag). 

 Eucetus amblyodon (Red Crag). 

 Balaenodon physaloides (Red Crag). 

 Physodon fusiformis (Red Crag). 

 Physodon grandis (Red Crag). 

 Hoplocetus borgerhoutensis (Red Crag). 

 Hoplocetus crassidens (Red Crag). 

 Ioplocetus curvi4ens (Red Crag). 



