20 MR. A. L. ADAMS ON THE OSTEOLOGY OE 



The entire lower molar, no. 44, of which the accompanying woodcut (fig. 3} and its 

 crown view (PI. IV. fig. 3) will give a good idea, contains eleven ridges in 3 inches. 



The talons here are mere apjjendages. The crown, like that of the last milk-molar of 

 E. melitensis (Falc), is long and narrow, the disks are also rhomboidal, with little, even, 

 faint crimping; the central angulations, however, as usual, are apparent. Indeed, 

 in regard to dimensions, this tooth might fairly claim to be the lower molar of PI. I. 

 figs. 10 & 17, and of the upper tooth described by Busk. 



C Series.— The two left lower molars. No. 66 (PI. VI. figs. 5 & 5a) and No. 67 (PI. V. 

 fig. 2), are precisely of the same type. They differ, not only in size but in configura- 

 tion and other characters, from any preceding lower molars. The entire specimen 

 No. 66 (PI. VI. fig. 5) contains eleven ridges in 4-2 inches. Unlike No. 44 (PI. IV. fig. 3), 

 the crown is much arcuated, and instead of being narrow in front is broad and rounded on 

 the internal border and narrows posteriorly. The plates, moreover, are thicker, being 

 0-34 instead of 0-3 inch. Indeed, altogether the tooth has very much the aspect of 

 a true molar. The crown, like the other, is long and narrow ; and the discal pattern 

 (PI. VI. fig. 5«) shows the pronounced expansions and angulations', with very little faint 

 crimping and numerous digitations. The enamel is not thick ; but the plates are large 

 as compared with No. 44 (PI. IV. fig. 3). 



The septum {a, fig. 5) still remains ; but as the crown was just being invaded, we 

 should not expect the next tooth to have made great progress ; however, the slope on 

 the back part shows there was pressure being exerted. 



The enth-e and remarkable upper molar described by Falconer as either the first or 

 the second true molar of his Meplias melitensis'^, holds eleven ridges in three inches. At 

 first sight one would be disposed to place it in the D series, with the molars referred 

 to the last milk-teeth of the largest form, which it and the specimen in my collection, 

 No. 24 (PI. II. fig. 9) closely resemble, but only in the crown-pattern^. 



The latter contains only seven of the anterior ridges, the remainder having been lost. 

 As far as the specimen goes, however, it may be called a.fac simile of the Zebbug tooth. 

 They differ from the last milk-molar above mentioned in the greater breadth of crown 

 and great height of ridges, which, however, are not nearly so thick, there being, for 

 instance, five ridges in 1-4 inch in PI. II. fig. 9, whereas there are only four in the same 

 space in PI. III. fig. 4. 



The profusion of the digitations is noteworthy, as they are especially plentiful on the 

 coUines of all the thin-plated milk- and true molars. Altogether these teeth appear to 



' The central rib or ribs which g^ve this feature to the cro-mi are more pronounced in some specimens than 

 in others, and more especially in those referable to the smallest form. See PI. II. fig. 5, where these ridges 

 are seen side by side in a plate of an analogous tooth to the above. 



' Vol. vi. pi. .53. figs. 9 & Off. 



' Compare my specimen (PI. II. figs. 9 & 9o) and Falconer's figures 9 & 9a with the disks of PI. IV. fig. 2<( 

 and PI. III. fig. 4. 



