152 Frederick Chapman: Cetacean Tooth. 



In the absence of any further evidence as to the relationship of 

 the Tasmanian fossil tooth with already described forms, it is here 

 provisionally referred to a new genus,^ Scaptodnn. The stained 

 and fossilised appearance of the tooth leaves no doubt that it was 

 derived from a Tertiary deposit of some considerable age. 



Occurre7ice. — " Found washed up at Ulverstone, N.W. Tas- 

 mania, after a heavy gale." — H. H. Scott, Victoria Museum, Laun- 

 ceston, Tasmania. Probably from either Janjukian or Kalimnan 

 beds of the Table Cape series of Tasmania (Miocene or Lower Pli- 

 ocene). 



In writing the above I wish to express my thanks to Mr. J. A. 

 Kershaw, F.E.S., for facilities in examining recent specimens, 

 and to Dr. E. Brooke Nicholls, for useful references and sugges- 

 tions. 



EXPLANATION TO PLATE XXYII. 



Fig. l.-^Scaptodon lodderi, sp. nov. Inner face of tooth. Giro, 

 natural size. 



,, 2. — Ditto. Edge view. 



,, 3. — Ditto. A thin transverse section of the tooth taken from 

 the base, showing the external cement above and the 

 ivory or dentine beneath. The cementum is perforated 

 by the hyphae of a boring fungus, x 144. 



