British Association, 



135 



Tribes. 

 Carpophaga. 

 Anterior incisors large 

 and long in both jaws ; 

 canines inconstant ; a 

 simple stomach; a very 

 long intestinum ccBcum. 



POEPHAGA. 



Anterior incisors large 

 and long in both jaws ; 

 canines present in the 

 upper jaw only, or 

 wanting. A complex 

 stomach; alongiw^es- 

 tinum ceecum. 

 Rhizophaga. 



Two scalpriform incisors 

 in both jaws ; no ca- 

 nines. Stomach with 

 aspecialgland ; caecum 

 short, wide, with a ver- 

 miform appendage. 



Families. 

 Phalangistidae. . 



PhascolarctidcB. . 

 Macropodidce. 



Genera. 



f Phalangista. . 

 \ Petaurus. 



Subgenera. 



{Cuscus. 

 Pseudocheirus. 

 Tapoa. 

 Acrobata. 



{ 



Phascolarctus. 



Hypsiprymnus. 

 Macropus. 



f Halmaturus. 

 \ Macropus. 



Di, 7 -J r Phascolomys. 1 



FhascolomyidtB . < t\- ^ j r 



^ \ Diprotodon. J 



Fossil. 



BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE, NINTH 



MEETING, HELD AT BIRMINGHAM.* 



Section of Zoology and Botany. 



August 27 J. E. Gray, Esq., V.P., in the Chair. 



Secretaries ; — Mr. E. Forbes and Mr. Patterson. 



Mr. Goodsir read a paper, * On the Follicular Stage of Dentition 

 in the Ruminants, with some remarks on that process in the other 

 orders of Mammalia.' The paper concluded with a recapitulation of 

 the principal facts contained in it. 1. In all the mammalia examined 

 (pig, rab-bit, cow, and sheep, &c.), the follicular stage of dentition 

 was observed. 2. The pulps and sacs of all the permanent teeth of 

 the cow and sheep, with the exception of the fourth molar, are formed 

 from the minor surfaces of cavities of reserve. 3. The depending 

 folds of the sacs of composite teeth, are formed by the folding in of 

 the edges of the follicle towards the base of the contained pulp, the 

 granular body assisting in the formation of these folds. 4. The 

 cow and sheep (and probably all the other ruminants,) possess the 

 germs of canines and superior incisives, at an early period of their 

 embryonic existence. — * On the preparation of Fish,' by Mr. Wilde. 

 — * On the Ciliograda of the British Seas,' by Edward Forbes and 

 John Goodsir. — * On some new Species of Entozoa, discovered by 

 Dr. Bellingham,' by Mr. Wilde. — *0n the Acceleration of the Growth 

 of Wheat,' by G. Webb Hall. 



Aug. 28. — * On an Experiment in the Growth of Silk at Notting- 

 ham, made this year,* by Mr. Felkin. — The Secretary read a paper 

 * Monday's proceedings will be found at p. 46. 



