18 REPORT OF THE 



The extensive series ofTertiary Fossils, which has long formed 

 one of the most instructive features in the general collection, 

 has been increased by the donation of some choice fossils of 

 the Coralline Crag from Mr. Start, of Mettingham, 



Amongst the fossils obtained by purchase, and deserving of 

 particular notice, is a large ammonite from the Calcareous Grit 

 of the Yorkshire Coast, in which a fortunate blow near the 

 base of the outer chamber has beautifully displayed an included 

 Aptychus or Trigonellite, a fossil body, the natural relations 

 of which have proved a most fruitful subject of speculation 

 among naturalists. It is believed that no similar example is 

 to be found in any other collection of Yorkshire fossils. A 

 small specimen of the Crocodile (Teleosaurus) from the Lias 

 of Whitby, in which the under surface of the lower jaw is 

 beautifully shown, and some fine examples of fishes from the 

 same formation, including the genera Pachycormis, Ptyclio- 

 lepis, and Lepidotus, have likewise been added to the collection. 

 A purchase has also been made of a few very choice fossils 

 from the neighbourhood of Lyme-Regis, and various mamma- 

 lian remains and miscellaneous fossils from Bacton in Norfolk. 



During the first six months of the year, an experienced 

 bird-stuffer was employed upon the premises in setting up 

 a selection from the numerous skins of foreign birds which 

 had long been accumulating in the Society's stores ; so that 

 more than 800 additional specimens are now exhibited in the 

 room appropriated to the ornithological collection. A recent 

 donation of 80 skins of birds from Van Dieman's Land, presen- 

 ted by Sir John Franklin, and another from Mr. Gould of 100 

 Australian Species, have rendered it desirable to re-engage the 

 services of the same person. The Council having determined 

 upon adding to the Library a copy of the splendid work 

 on the Birds of Australia, now in course of publication by Mr. 

 Gould, this gentleman has undertaken to furnish free of cost to 

 the Society, a complete scientific catalogue of the entire ornitho- 



