BY E. B. SANGER, C.M.L.S. N.S.W. 299 



pillar is larger than the pulp-cavity of the other pillar. In a 

 cross section faint lines can be seen radiating from the pulp- 

 cavities. (See fig. B.) 



The antero-posterior diameter at the base of the crown is 9/10 

 of an inch, the median transverse diameter 4/10, and the median 

 height of the crown is f of an inch. The transverse diameter of 

 the larger fang or pillar 3/10, and the smaller •25 of an inch ; 

 the diameter of the connecting isthmus is 1/10 of an inch. The 

 fang has been broken off, though probably it was not much 

 longer. I am inclined to think that possibly the isthmus was 

 wanting in the portion broken off, so that the pillars became two 

 distinct fangs. The pillars are in fact morphologically, fangs. 

 The tooth is possibly from a young animal as the cusps are hardly 

 at all worn. It differs widely from a molar tooth of Zeiiglodo7i 

 cetoides. It is very much smaller and resembles somewhat a 

 molar tooth of a seal. 



The Phocodontia, comprising Zemjlodon and its kindred, in fact 

 are connecting links between the Cetacea and the Pmnipedla. The 

 length of Zeuglodon cetoides has been estimated to be seventy feet. 

 Allowing that this tooth belonged to a j^oung animal, I hardly 

 think that the adult would have been over twelve or fifteen feet 

 in length. It was evidently carnivorous. The beds in which 

 the tooth was found are decidedly Eocene in character, though 

 not identical with any particular division of the Eocene. I have 

 identified from the same beds the following characteristic Eocene 

 fossils viz. : Lamna elegans, Notidanus primigenius, Carcliarodon 

 angustidens, Nautilus (Aturia) %ic-zac, Pecten Poulsoni, Crassatella 

 aUa, and Chjpeaster (Mortonia) Rogersi. Its age corresponds 

 therefore with Z. cetoides, found in the Eocene beds of the' Southern 

 United States. It is to be hoped that more traces of this 

 interesting and aberrant Cetacean will be found. I propose 

 naming this species, which possibly may be a new genus, Zeuglodon 

 Sarivoodii, in honor of James G. Harwood, Esq., formerly of 



