Cope. ] 284 [Dec. 17, 
angulate extremity which terminates in a thin edge. ‘The form is like 
that of a narrowed radius of ZL. ¢etericus, but it is much too short for the 
ulna, As it was found with the scapula, it is probably a portion of the 
fore limb, and hence may be a metacarpal. A somewhat similar but 
narrower bone may be metatarsal. A piece which is probably the free 
hypopophysis of the atlas, is a transversely elliptic piece with an oblique 
smooth articular face at one end. The posterior face rugose, the inferior 
with a flat truncate process directed downwards and backwards. If cor- 
rectly identified, its great peculiarity consists in its thinness anteropos- 
teriorly, and the large process. 
In comparing this species with the L. proriger, its nearest ally, I have 
already observed the difference in the form of the articular surfaces of 
the cervical vertebre, which is in that species vertically oval; the present, 
transversely so. The comparison is made between posterior cervicals of 
both, which in L. dyspelor are less depressed than the others. As it is 
possible that the form in the type example of L. proriger may be slightly 
affected by pressure, I compare other points. Thus the palatine bones 
are more slender anteriorly, and the outer edge descends lowest in a 
ridge ; in L. proriger inner is produced downwards as a longitudinal rib. 
In this species there are eleven teeth; in that one, nine. The quadrate 
bone of L. proriger presents a longer external angle, and more prominent 
external ridge, with smaller space enclosed by the bases of the greater 
ala. My statement in a published letter to Professor Lesley, that the ends 
of the mandibles were acute, thus differing from LZ. proriger, is an error, 
due to my having mistaken the palatines for the dentaries on a cursory 
examination in the field. The posterior extremity of these bones in ZL. 
proriger is unknown. 
The only species whose dorsal vertebrae are known to resemble in the 
stoutness of their form those of Z. dyspelor, is L. crassartus ; the mani- 
fold differences of the latter will be at once discovered on reading the 
description already given. 
Measurements. 
M. 
Atlas length inner articularface:.isc7vitiis eee deve eee 0.065 
he reo posterior: ** LOA AE atleast Geena ae 054 
“a. depul es ‘4 io Sinese ne ciel a. s eardieys 037 
Amie length at middle of Sida) wwixies. iatiageves sori. t 075 
i QOpul AUteriOrly? sce is eel vid t ae eee artes ak O81 
‘Oselevation NGural Spine ss 68. ci cae ee ec. 075 
“* width & £60: (DIAN) eile de dite Mayan eh 2 045, 
a Acie Ln a IAS 
Cale ee ten ee cane 
pe LOTBOMD ees Pisce cui UN Cnc he CET Reece sea 09 
Rios doug ‘ ’ VOUUICH 6 Oe cds ees ea 065 
nterior dorsal, diameter ball { Horizontal: 7s ees. 3 foe ST 
