1879. | Geology and Paleontology. 197 
GEOLOGY AND PALZONTOLOGY. 
MineraL Wax in Urtan.—Prof. J. E. Clayton of Salt Lake, 
finds it to be ozocerite, and Prof. Wurtz has obtained from the 
same region zietriskisite. 
_ MERYCOPATER AND HopLopHoneus.—Having recently had the 
opportunity of examining the entire dentition of the lower jaw of 
the Hyopotamus guyotianus Cope, I find that it does not belong to 
the genus to which I referred it, but to an allied one, which ap- 
pears to be undescribed. It differs from Hyopotamus, having but 
three premolars and a simple diastema. The premolars are wide, 
and the last has four crescentoid cones, as in the first true molar 
(crowns of first and second lost), Canine well developed, com- 
pressed, anterior. The cones, both internal and external 
have a crescentic section. The inner cones are convex on the 
inner side in Gelocus, which also differs from this form as does 
ee te in the simple compressed form of the premolars. 
e present genus may be called Merycopater. M. guyotianus was 
as large as the white-lipped peccary. 
Fine specimens of the Macherodus brachyops Cope (1. c. p. 10), 
show that it possessed an inferior tubercular tooth. It therefore 
belongs to the genus Hoplophoneus nie It isa very much larger 
species than the Æ. oreodontis Cope.—E£. D. Cope. 
Tue Nature oF E6z06n.—Dr. Ka rl Mobius contributes to 
Paleontographica for 1878, the results of his investigations into 
the structure of Eözoön gm oen He used specimens re- 
ceived from Drs. Dawso d Carpenter. As an expert in the 
study of recent pania tei (Rhisopoda), Dr. Mobius’s opinion 
carries with it much weight. His conclusion is, that the col- 
umns of the Eözoön limestone which Carpenter and Dawson 
supposed to be the casts of a canal system of the “ intermediate 
or supplemental skeletons,” are simply casts of fissures of various 
and unsymmetrical shapes having no resemblance to the tubules 
of any organic being. They are mostly flat, and frequently in- 
terrupted. “The fibrous material found between the serpentine an 
the calcareous masses, supposed to be casts of the canals of the 
walls of the chambers of E6zo6n, such as exist in the Forami- 
nifera, consists of prismatic crystals of chrysotile. Dr. Mobius 
does not believe them to be casts of tubes, since no tube walls or 
interspaces can be seen by high powers either with or without. 
polarized light. 
Tue AGE or THE Laramiz.—Prof. Schimper, of Strasburg, 
PE oita Bulletin, 30, p. 15, Proceed. Amer. Phil. Soc. for November, 
I 7 r) 5 rey Se ae ʻ : eas Fa ie y 4 
