PHASCOLOTHERIUM. 63 
just been found and forms the subject of the following 
sketch.— 
“The ten teeth, represented in the figure accompanying 
M. Prevost’s memoir,* are evidently grinders, and some- 
what resemble the molar teeth of my specimen, which has, 
however, only seven grinders; and, when it was lent to 
Dr. Buckland, they were the only teeth apparent. He, 
however, caused the stone to be carefully scraped away, 
and there appear, in addition, a canine tooth” (cut 20, /) 
“and three incisors” (7b. 7). ‘‘'There is room also for a 
fourth: the end of the jaw is fractured, and there are 
traces of what may be the alveolus of a fourth incisor. 
With this addition, the specimen would give the exact 
number of teeth in the half of a lower jaw of a Didelphis, 
viz., four incisors, one canine, seven grinders. The fossil, 
which is in high preservation, is imbedded in a slab of 
Stonesfield slate, together with Trigoniw and other marine 
exuvie ; the whole mass exhibiting the Oolitic structure in 
the most satisfactory manner.” 
“‘ My specimen consists of the right half of a lower jaw, 
the inside of which is presented to view. To say nothing 
of the difference of form in the jaw-bone, M. Prevost’s 
figure gives us the representation of a portion of a lower 
jaw with ten grinders therein: my fossil has only seven, 
and appears to have been part of an animal generically 
different. The teeth are distinctly separated, and those 
who are best qualified to judge, are of opinion that the jaw 
did not belong to a young individual. The well defined 
ridges and decided features of the bone denote a full-grown 
animal :* the sharpness of the teeth makes it probable that 
it was not an aged one.”—“ As the history of this animal,” 
* © Pl, 18. fig. 1, 2.” See ante, fig. 16. 
