Notices of Memoirs — Neiv American Fossil Vertebrates. 33 



measuring each twenty-five inches by seventeen inches, and on the 

 scales of four miles to an inch horizontal, and 2000 feet to an inch 

 vertical. They are to be constructed from the published information 

 of the Ordnance, Admiralty, and Geological Surveys, etc., and they 

 tvill clearly indicate by relief the principal physical features of the 

 country, and being coloured geologically, according to the difi'erent 

 rocks exposed at the surface, they will show the relation between 

 geological structure and physical features, and at the same time 

 exhibit in a way unequalled at present, the meaning of our geolo- 

 gical maps. Editions will be issued, showing by colour the river 

 basins, rainfall, registration districts, etc., so that they will prove 

 most useful not only as educational models, but will also be very 

 serviceable to military men, engineers, and even medical men, for 

 the relation between health and geology is occupying a great deal of 

 attention at the present day. Special models of the Wealdeh dis- 

 trict, and of the Thames basin, are to be ready early in January. 



IV. — Silliman's American Journal for November last contains 

 the following interesting palseontological discoveries : — 



1. Discovert of Fossil Quadrumana in the Eocene of Wyoming. 

 By 0. C. Marsh. — An examination of more complete specimens of 

 some of the extinct Mammals already described by the writer from 

 the Eocene deposits of the Eocky Moimtain region clearly indicates 

 that among them are several representatives of the lower Quadru- 

 mana. Although these remains differ widely from all known forms 

 of that, group, their more important characters show that they 

 should be placed with them. The genera lAmnotlierium, TMnolestes, 

 and Telmatolestes, especially, have the principal parts of the skeleton 

 much like some of the Lemurs, the correspondence in many of the 

 larger bones being very close. The anterior part of the lower jaws 

 is similar to that of the Marmosets, but the angle is more produced 

 downward, and much inflected. The teeth are more numerous than 

 in any known Quadrumana. Some of the species have apparently 

 forty teeth, arranged as follows : Incisors ^\ canines -|-, premolars 

 and molars -f. A full description of these interesting remains, the 

 first of the order detected in this country, will be given by the 

 writer at an early day. 



2. Note on a New Genus of Carnivores from the Tertiary of 

 Wyoming. By 0. C. Marsh. — Additional remains of the large 

 Carnivore described by the writer, on p. 203, op. cit., as Limnofelis 

 latidens, show clearly that it represents a genus quite distinct from 

 L.ferox. The canine and premolars of the lower jaw somewhat 

 resemble those in the Hygena, but there were only two incisors in 

 each ramus. One of these is large, and close to the canine. Inside 

 and partially behind this, is a cavity for a second and smaller incisor. 

 The remaining teeth preserved are especially broad and massive. 

 The first lower premolar is separated somewhat from the canine, and 

 is inside the line of the teeth behind it. The remains now known 



