210 VERTEBRATES PROM THE 1GHTHAM PISSURE. [May 1 894, 



Fig. 16. Rangifer tarandus. Part of lower jaw, right ramus, with two milk- 

 teeth in place. 



16 a. ,, ,, The two teeth seen from above. 



17. Mustela robusta, n. sp. Left humerus, front view. 



17 a. „ „ Same bone, outer side. 



18. „ „ Right ulna, inner side. 



19. „ vulgaris, var. minuta. Lower jaw, right ramus. 



20. ,, ,, ,, Left tibia, front view. 



Plate XII. 



. 1. Cants vutyes. 



Eight femur. 



2 m 



,, 



Right humerus. 



3. ,' 





Right mandibular ramus. 



3 a. , 





Teeth of same, seen from above. 



4. 



,, 



Right upper jaw. 



0. , 



lagopus. 



Left femur. 



ba. , 



,, 



Same bone, inner view. 



6. 





Tibia. 



6 a. , 





Same bone, proximal articulation 



Qb. , 





Same bone, distal articulation. 



7. , 



,, 



Right humerus. 



7 a. , 





Same bone, inner side. 



8. 





Left mandibular ramus. 



8 a. , 



,, . 



Teeth of same from above. 



9. , 



,, 



Right upper jaw. 



9 a. , 



,, 



Same, palatal view. 



10. Urs 



us arctos ? 



Left fifth metacarpal. 



11. Hyt 



?na crocuta 



? Canine tooth, much denuded. 



Discussion (on the two preceding Papers). 



The President said it was greatly to be regretted that Mr. Abbott 

 was unable to be present at one of the best-attended meetings of 

 the Session. 



Mr. Toplet compared the fissures filled with loam and gravel, 

 and containing mammalian bones and land-shells, of the Maidstone 

 district with the interesting example now described, and explained 

 that those of the Maidstone Rag country were connected with 

 overlying deposits of drift, the material now filling the fissures 

 having been let down into the rock by solution of the limestone 

 along joints and cracks. He now thought that some of the wider 

 pipes of brick-earth of the Maidstone area may be partly due to 

 slipping of the rock over the Atherfield Clay below, letting down 

 the overlying drifts bodily into the long spaces thus formed. The 

 numerous fissures near Maidstone had been so carefully noted by 

 the late Mr. Bensted and his son during many years, that it seemed 

 unlikely that such interesting deposits of bones as Messrs. Abbott 

 and Newton now described could have been there overlooked. 

 The Boughton 'fissure' or 'cave,' described by Bnckland and 

 referred to by Murchison, was not near any important deposit 

 of drift, and this fissure more resembled that at Ightham; the 

 latter probably somewhere had communication with the surface. 



Mr. Topley referred to a diagram exhibited by the Author 

 illustrating his views as to a reversal of drainage in the Shode 

 Valley area : the higher gravels having been formed by a stream 

 which flowed northward towards the Darent from the Lower 

 Greensand escarpment, which then stretched far to the south over 



