546 
ing perhaps no fossil remains which will ever 
be detected.’ 
T. D. A. CockrreLt 
UNIVERSITY OF COLORADO 
SPECIAL ARTICLES 
NOTE ON THE UPPER EOCENE TITANOTHEROID 
TELMATHERIUM (7?) INCISIVUM DOUG- 
LASS FROM THE UINTA BASIN 
In describing the type of this species (a 
skull, No. 2,898 Carnegie Museum Catalogue 
of Vertebrate Fossils) Mr. Douglass' said: 
I think that this skull represents a different 
genus from Telmatherium, but I prefer to place it 
provisionally here rather than establish another 
genus. 
Through the courtesy of Mr. Douglass, 
Director Holland and Professor Osborn, the 
present writer has been enabled to compare 
this type with the extensive Eocene Titano- 
there material in the American Museum of 
Natural History. With the approval of these 
gentlemen the species Telmatherium (2) in- 
cisivum Douglass is hereby made the type of 
a new genus or subgenus Sthenodectes. This 
genus is distinguished from Telmatherium 
ultimum Osborn by the following assemblage 
of characters: (1) The incisors are far larger 
and more advanced in evolution, i being 
closely appressed to its fellow in the median 
line, with anterior face elongate, anteroin- 
ternal tip blunt, median basin large, posterior 
wall or cingulum very massive; i’, i? extremely 
large with low recurved tips and very heavy 
posterior cingula. (2) The posteanine dias- 
tema is reduced or absent. (8) Superior pre- 
molars 2, 3, 4 are much more advanced than 
in T. ultimum, having very heavy internal 
cingula, pronounced external cingula, high 
slender internal cusps (deuterocones) ; p’ espe- 
cially is in a relatively advanced stage, as 
compared with T. ultimum. (4) The least 
* The Cichlids, with a very similar distribution, 
have left us beautifully preserved fossils of Eocene 
age in Wyoming, but not elsewhere. 
*Ann. Carnegie Mus., Vol. VI., No. 2, 1909, 
p. 305. 
* ggévos, strength, s,xr7s, a biter, in allusion to 
the great power and development of the incisors 
and canines. 
SCIENCE 
[N.S. Von. XXXV. No. 901 
transverse diameters of p* and of the anterior 
lobe of m’, are greater, that of m? much less, 
than in T. ultimum. (5) The basicranial re- 
gion differs in many details, such as the ap- 
parent junction of the post-glenoid and post- 
tympanic processes below the auditory meatus. 
(6) The occiput is low with a sharp, long, 
sagittal crest. (7) The forehead is relatively 
wide. (8) The nasals taper distally. 
From Manteoceras (especially M. wintensis) 
the genus under consideration is distinguished 
by: (1) The form and size of the incisors and 
canines, (2) the much more advanced stage of 
evolution of the premolars, (8) the shorter 
anteroposterior diameter of m’, (4) the reduc- 
tion of the post-canine diastema, (5) the 
arched and spreading zygomata; ete. 
From Dolichorhinus and Mesatirhinus it is 
separated by the shortness and relative breadth 
of the skull, the great size of the incisors, the 
relatively heavy zygomata and many other 
details. 
The genus or subgenus Sthenodectes is ap- 
parently allied to Metarhinus and may well be 
related to Metarhinus earlei Osborn from the 
Upper Washakie, which it resembles in im- 
portant characters of the premolars and 
molars, form of the basis cranii and occiput, 
marked constriction of the face in front of the 
orbits as seen from above. The narrow taper- 
ing nasals and other characters also suggest 
affinity with Metarhinus diploconus. The 
type skull of Sthenodectes incisivum differs 
from all known Metarhinus material in the 
form and in the very large size of the incisors 
and canines, in the much stronger internal 
cingula on the premolars, stout zygomata, 
junction of the post-glenoid and post-tympanic 
processes below the auditory meatus. The 
forms of the premaxillary and of the subnasal 
incisure also differ from those of Metarhinus, 
The supposed vacuities in the lachrymal re- 
gion, although indicated on both sides, may 
be artifact. Witiram K. Grecory 
OIL CONCENTRATION ABOUT SALT DOMES 
In several national, state and private publi- 
cations the writer has called attention to the 
remarkable concretionary growth and bodily 
