230 CHARLES STEWART. 
as far as the origin of the fangs. In front of the teeth was a 
small oval soft papilliform elevation, which apparently corre- 
sponded with the most anterior of the three pairs of teeth 
found by Mr. Poulton in the upper jaw. These in his speci- 
men were most developed, and would probably be the first to 
be shed. Inold specimens the site of this elevation is occupied 
by a small triangular epithelial cup, continuous with the two 
main ones situated immediately behind. 
The crowns of the teeth in the upper jaw were of an 
irregular rhombic outline, with crenulate margin; cusps of 
varied size roughened their free surface, each tooth bearing 
two of larger dimensions near its inner border. 
The teeth in the lower jaw were three in number on either 
side; they presented much the same genera! features as those 
in the upper jaw, but the hindermost tooth was of small size, 
and had a single large cusp in the middle of its free surface, 
with a single fang corresponding to it. The two large teeth 
in front had their two chief cusps situated one in front of the 
other, and rather nearer the external than the internal border 
of the crown. 
The complete dental formula would, as far as at present 
— as surmised by Mr. Poulton. 
The specimen now described and figured in Pl. VIII shows 
the teeth in a more complete condition than has yet been 
described. Mr. Hollick having prepared for me a very careful 
enlarged drawing of the crowns of the molars, Professor 
Lankester expressed the wish to publish the drawing in 
the ‘Quart. Journ. Micr. Sci.,’ so that an accurate repre- 
sentation of the very remarkable and definite character of 
these multituberculate teeth might be in the hands of zoologists 
and paleontologists. I complied the more readily with my 
friend’s wish, since Mr. Poulton’s original illustrated account 
of the first discovery of these teeth appeared in this Journal. 
known, be 
