330 Reports and Proceedings — Geological Society of London. 



The bone clescriberl in tin's communication was found in 1898 by 

 Mr. Anderson on tlie bank of the River Medway, near Tonbridge. 

 It was seen projecting from reconstructed rock which contained 

 fragments of flints among other materials. Traces of matrix at the 

 distal end show that the specimen has been derived from quartz- 

 sand bound together with liinonite, such as might occur in the 

 Hastings Sand, Wealden Clay, or Lower Greensand. Conditions of 

 mineral structure and osteological character incline the author 

 to believe that the bone was originally contained in the Wealden 

 Clay. The fossil is 4 inches long, anil indicates a humerus which, 

 may have been 6 inches in length when perfect, as large as that of 

 a wolf but smaller than that of a bloodhound. The form of the 

 shaft precludes any comparison with the carnivora, and indicates a 

 resemblance to ungulate types. When the bone is held vertically 

 and seen from the front, the condyles are oblique — a character not 

 observed in any other animal. The weight of evidence appears to 

 incline towards reference of the fossil to the Artiodactyla, but it 

 probably indicates a new family type. 



2. " On Evidence of a Bird fi-om the Wealden Beds of Ansty 

 Lane, near Cuckfield." By Prof. H. G. Seeley, F.E.S., F.G.S. 



A fragment of bone found, by Mr. Neville Jones, a member of the 

 London Geological Field Class, embedded in sandstone was identified 

 by the author as probably the distal end of the femur of a bird. 

 The external condyle is not only larger and deeper than the inner, 

 but is more prolonged distally — perhaps the most distinctive avian 

 character of the bone. Colymbns is the only existing bird to which 

 the fossil makes any approximation, but the resemblance is distant 

 and not suggestive of near affinity, and it is interesting that the 

 Cretaceous birds show so marked an affinity with that type. The 

 resemblances of the Dinosaurian and Crocodilian femora with this 

 type are such that almost every individual feature of the bone can 

 be paralleled in some fossil referable to these groups, but there 

 are no British dinosaurs of so small a size or possessing some of 

 the marked features shown by this bone. 



3. " Notes on the Ehyolites of the Hauraki Goldfields (New 

 Zealand)." By James Park, Esq., F.G.S., and Frank Rutley, Esq., 

 F.G.S. ; with Analyses by Philip Holland, Esq., F.I.C., F.C.S. 



Part i of this paper, by Mr. J. Park, gives a description of the 

 rhyolites as seen in the field. After a rest from volcanic action 

 during the Secondary Period, the Tertiary eruptions burst forth 

 and were more widespread than those of recent times. In the 

 Haui'aki Peninsula the basement Palgeozoic rocks are covered by 

 richly fossiliferous marly clays and limestone of Lower Eocene age, 

 and these by a vast accumulation of andesitic lavas and tuffs, 

 in places 3,000 feet thick. These andesites are the gold-bearing 

 rocks of the district, and they are succeeded by rhyolitic lavas and 

 ashes. Both andesites and rhyolites were influenced by solfatarie 

 action, resulting in siliceous deposits rich in gold and silver. The 

 rhyolites rest on rocks probably of Upper Miocene age, and are 



