loo Kansas university quarterly. 



Diameter of last molar, transverse, anterior end of third 



crescent 64 mm 



Diameter of last molar, transverse, anterior end of fourth 



cresent 60 " 



A portion of a right ramus presented to the museum by Mr. 

 , and collected in the — '- beds of South Dakota, is some- 

 what larger than the foregoing, but agrees with it very well other- 

 wise, except that the elevation in front is less pronounced. There 

 are two teeth, too much worn for exact comparison, the posterior 

 one badly broken. The mental foramen is located in the same 

 position as in the foregoing, but there is another foramen about 45 

 mm behind and 20 mm below the first. This specimen is certainly 

 a Tetracaulodon (^Trtrabclodoii) identical with or very closely allied 

 to shepardii. 



Measurements: 



Depth of ramus, anterior end of posterior tooth 140 mm 



Depth of ramus, at elevation 155 " 



Through the kindness of Prof. Grimsley of Washburn college, 

 Tppeka, I have had the privilege of studying several specimens 

 from the museum of that institution, coming from the same bed as 

 the jaw first mentioned. These specimens agree in almost every 

 respect with those in this museum, and must be considered as be- 

 ing conspecific with them. 



I. Parts of two maxillaries, connected with small portions of 

 th palatines, and containing the two first molars on each side. The 

 teeth on the right side are more worn than those on the left. The 

 front tooth is two-crested, the second three-crested with a slight 

 indication of a fourth crest. The inner half of each crest is worn 

 to a trefoil, the outer half is oval 'with slight buttresses, cingulum 

 distinct. Outer halves of crestsslightly inadvance. (See Plate XXV.) 



Measurements: 



Diameter of first molar at base, antero-posterior 55 mm 



Diameter of first molar at base, transverse 45 " 



Diameter of second molar at base, antero-posterior 105 " 



Diameter of second molar at base, transverse 70 " 



The suture between the two halves of the palate is straight and 

 distinct. The palatines extend slightly forward of the base of the 

 second molar. The upper portions of the maxillaries are much 

 honeycombed; a small portion of the nasal passage is shown. 



Measurements: 

 Diameter of palate to edge, anterior ends of second molars.. 185 mm 

 Combined width of palatines 26 " 



