300 



in strata of corresponding age in North America and New 

 Zealand. A few isolated teeth occur in the cave-deposits of 

 Italy. The Natural History Museum contains an excellent 

 reproduction of the skull of Squalodon. 



The researches of Dr. C. W. Andrews (see his catalogue 

 referred to on p. 266) and Dr. E. Fraas in Egypt have revealed 

 several earlier ancestors of the whales. Of these Protocetus 

 appears to be derived from the Creodonts (early ancestors of the 

 Carnivora). This is followed by Prozeuglodon. 



Eemains of the gigantic Sperm Whale or Cachalot (Physeter 

 rnacrocephalus) are found in the Forest-bed of Cromer, and also 



FIG. 111. Skull of thick-toothed Grampus, Pseudorca crassidens. (Owen.) 

 Fen, Lincolnshire. 



in a later deposit in South America. A number of Miocene and 

 Pliocene forms allied to the Cachalot have been described under 

 various names, Eemains of the curious Narwhal, with its long 

 spear-like tusk, have been found in the Norfolk forest-bed. 

 Owen has described the skull of a thick-toothed Grampus 

 that was found beneath the turf in the great fen of Lincoln- 

 shire, in the year 1843 (see Fig. 111). It belongs to the existing 

 Pseudorca crassidens, but Owen thought it differed from the 

 present dolphins of our own coasts. Extinct genera of dolphins 

 are known to occur in some of the later Tertiary deposits of 

 Europe and America. 



