1 1^ 



18(!9.] ^ '«-' [Cope. 



and outer lateral margins in each are about equal. In profile the first is 

 slightly the more elevated of the two. 



Measurements. 



Lines. 



Length of ramus from maxillary foramen to incisive al- 

 veolus above 5.35 



Length of bases of two anterior molars 1.39 



" from base of m. 1 to do. of incisor 1.7 



" " mental foramen to base of incisor 1.55 



Least depth ramus (near mental foramen) 3. 



Depth ramus at first tooth 2.6 



" " third " 2.4 



Width " second" 1.2 



These indicate a much stouter form than in the Tamias striatus.* 

 The foramen mentale is lower in position; the series of molars is much 

 less oblique to the axis of the ramus than in the chipmunk, and the inci- 

 sor tooth is stouter. As compared with the S. hudsonius tlie measure- 

 ments are absolutely one third greater, indicating a diflference in size of 

 nearly two to one. Viewed from above the thickness of the ramus at the 

 middle in Sc. panolius is proportionately very much less, while at the 

 incisive margin there is less difference; the two measurements being 

 equal in S. panolius, the incisive miich narrower in Sc. hudsonius. 

 The first molar in the existing species is narrower outside than inside and 

 simple; in Sc. panolius, equal and emarginate. 



This little species has not furnished sufficient materials to indicate its 

 relationships fully; but it is smaller than any true squirrel now inhabiting 

 the United States. 



Lepus sylvaticus, Bachm. 



Numerous molar and incisor teeth from both jaws, and two partially 

 broken rami of the mandible. One of these is broken off behind the third 

 molar; another complete only as far as the usual line of the coronoid 

 process, and containing the second, third and fourth molars. These por- 

 tions are similar to those of the common species now found throughout 

 the eastern district of North America. Also from Galena; see Leidy 1. c. 

 XI, p. 100. 



Anomodon snyderi, Leeonte. Amer. Jovirn. Sci., 1848, 103. Journ. 

 Ac. Nat. Sci., Phil., Ill, 171, Tab. 



A large and remarkable insectivore known only as yet from an incisor 

 tooth from Galena. 



Blaeina, sp. 



A nearly complete ramus with dentition perfect, of about the size of 

 that of the common B. talpoides was found, but unfortunately 

 mislaid. 



* See Baird. U. S Pac R. E. Expl. VIII, Tab. XLVI, 2 and 1. 

 A. P. S. — VOL. XI — W 



