Vol. 52.] MAMMALIAN REMAINS IN DEBWBNT RIVER-GRAVEL8. 499 



-^ inch in diameter. The portion retained in the sieve (with 

 the exception of some quartzite-pebbles, fragments of flint, and a 

 few very much decomposed pieces of limestone similar to those 

 found in the same gravel-terrace at Alvaston) was sent to Mr. Clement 

 lleid, P.G.S., who kindly examined it for plant-remains. Mr. Keid 

 reports that ' the plants indicate a moist meadow or swampy ground, 

 and a temperate climate. I can say nothing more definite, as the 

 species are all widely distributed. An elytron and thorax of a 

 beetle were found in addition to the following plants : — 



Plants found with Hippopotamus. 



Banunculm aquatilis, Linn. 



„ sceleratus, Liun. 



,, Flammula, Linn. 



,, repens, Linn. 



,, bulbosus ?, Linn. 



,, Sardous, Crantz. 



Viola pahtstris, Linn. 

 Montia fontana, Linn. 

 Bubus Idceus, Linn. 

 Potentilla ? 

 Hydrocotyle vulgaris, Linn. 



Valeriana officinalis, Linn. 



Eupatorium cannabinum, Linn. 



Leonfodon autumn alls, Linn. 



Taraxacum officinale, Web. 



Ajuga reptans, Linn. 



Atriplex ? 



Eleocharis pahtstris, Linn. 



Scirpus paucijlorus, Lightf. 



Carex ? 



Isoetes lacustris, Linn.' 



Part of the sand which had passed through the first sieve was then 

 sifted through others with meshes of -^ inch and -pL- inch, and the 

 various portions were examined under the microscope. It consisted 

 for the greater part of a quartz-sand, the larger grains of which were 

 well rounded, and the smaller subaugular and broken, together with 

 flakes of white mica, some of which showed a negative bisectrix in 

 convergent light. In addition to these a very small proportion of 

 a fine dark-coloured material and fragments (^ inch to ^ inch in 

 diameter) of probably plant or bone occurred, or perhaps both of 

 these substances. 



A sample of the blue sandy clay was similarly examined. It 

 contained a few rootlets, and consisted of broken quartz-grains and 

 a fine amorphous substance. 



A sample of gravelly sand from the same gravel-terrace at 

 Alvaston was also examined. Mr. Reid was unable to find any 

 plant-remains in the sandy clay or in the gravelly sand. 



The 127 bones and fragments obtained belong almost entirely to 

 the Hippopotamus, and probably to one animal. 



List of Hippopotamus-hones. 



Lower jaw (greater portion) with the two back molars and two canines. 

 Five cervical, thirteen dorsal, four lumbar, and four sacral vertebrae. 

 Os innominatum. 

 Hind legs and feet : 



Left femur, 21 inches long. 



„ tibia, 1 5 inches long. 



,, fibula (lower portion). 



,, caloaneum. 



„ cuboid. 



,, metatarsal iv. 



