Reports and Proceedings — Geological Society of London. 573 



carnivores and Galesaurus. A similar character and disposition of 

 destructive canines is shown by the fossil jaws of the Oolitic great 

 extinct carnivorous Saurians, e.g. Ifegalosaurus. In the Triassic 

 Labyrinthodonts the destructive and prehensile laniaries would De- 

 position rank as incisors rather than canines. In existing Lizards the 

 dental series has more uniformity, and the cement-clad roots contract 

 bony union with the jaw-bone. In Galesaurus the teeth, besides being 

 distinguished, as in Mammals, by their differential characters, are 

 implanted freely in sockets, the cold-blooded character being chiefly 

 manifested in the greater number of teeth following the canines, and in 

 their want of distinction. 



Lastly, the author remarked on the earlier reptilian character shown 

 by the Oolitic Mammal Amphitherium, and also by the existing Australian 

 Myrmecobius. He speculates on the degree of resemblance manifested 

 by the teeth of the old Triassic Reptile of South Africa with the excep- 

 tional characters of some of the low Australian forms of Mammals. 



2. " The Cetacea of the Suffolk Crag." By E. Lydekker, Esq., 

 B.A., E.G.S., etc. 



This paper commenced with notices of previous contributions to 

 the subject by Sir R. Owen, Prof. Bay Lankester, Prof. Huxley, and 

 Prof. Flower. In the preparation of a catalogue of the specimens 

 in the British Museum, the author had had occasion to examine the 

 collection of Cetacea from the Crag, not only in that Museum, but 

 also in the Museum of Practical Geology, that of the Royal College 

 of Surgeons, and in the Ipswich Museum, besides visiting the collec- 

 tions at Brussels. In consequence several additions to the fauna and 

 also numerous emendations of specific names were noticed in the paper 

 now laid before the Society. Prof. Bay Lankester's views as to the 

 Diestian affinities of the English-Crag Cetacea were confirmed by this 

 comparison. 



Detailed notes on the specimens examined and the species identified 

 were given. The following list of the species believed to be repre- 

 sented in the various collections mentioned was given at the conclusion 

 of the paper : — 



Balcena ajfinis, Owen. 



„ primigrenia, van Beneden. 



„ insignis (van Beneden). 



,, balcenopsis (van Beneden). 

 Megaptera affinis, van Beneden. 



similis (van Beneden). 

 ,, minutus (van Beneden). 

 Balcenoptera definita (Owen). 



,, Goropi, van Beneden. 



Balcenoptera borealina, van Beneden. 



,, emarginata (Owen). 



Cetotherium Brialmonti (van. 

 Beneden) . 



dubiuin (van Beneden). 

 ,, Hupschi (van Beneden). 



,, brevifrons (van Beneden) . 



Serpetocetus scaldiensis (van 

 Beneden). 



Physeterid^:. 



Eucetus amblyodon, du Bus. | Choneziphhis planus (Owen). 



Homocetus Villersi, du Bus. ,, Pnckardi, Lankester. 



Balcenodon physa/oides, Owen. 

 Bhysodon grandis (du Bus). 



„ fusiformis ? (du Bus). 

 Hoplocetus crassidens, Gervais. 



,, borgehoutensis, Gervais. 



,, crassidens ? Gervais. 

 Hyperoodon, sp. 

 Choneziphius planiroslris (Cuvier). 



Mesoplodon longirostris (Cuvier). 



„ tenuirostris (Owen). 



„ gibbus (Owen). 



,, angustas (Owen). 



,, angtdatus (Owen). 



,, compresms (Huxley). 



Floweri, Canliam MS. 



