PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



by the 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 

 Vol. 85 Washington: 1938 No. 3035 



A MIOCENE DOG FROM MARYLAND 



By Charles T. I^erry 



No CANiD remains hitherto have been reported from the Miocene 

 of Maryland, and very few from otlier Tertiary deposits of the 

 Atlantic Coastal Plain. The material herein described consists of 

 two associated lower molars found in the cliff near Plum})oint, Md., 

 on the west side of Chesapeake Bay. 



I have consulted with Dr. C. L. Gazin, and he has been good 

 enonoli to verify the generic allocation and to allow me to examine 

 pertinent specimens in the LTnited States National Museum. 



Genus TOMARCTUS Cope 



TOMARCTUS MARYLANDICA, new species 



FlGLRE 68 



Type.—M^ and M. from the left mandible, U.S.N.M. no. 15561, 

 collected by Charles T. Berry, August '2(S. 1037. from zone 10 of the 

 Calvert formation, V/o miles south of Plumpoint wliarf, Calvert 

 County, Md. 



Descriptio?i. — Mi is incomplete, lacking the paraconid and anterior 

 root. The heel of the tooth is broad and flat, with a rounded posterior 

 margin. The entoconid is slightly higher than the liypoconid, and 

 tlie connecting ridge is straight. The protoconid, the most outstand- 

 ing feature of the tooth, is about twice as high as tlie metaconid. 

 Halfway up the outer posterior side of the protoconid there is a very 

 small tubercle. An obscure ridge runs from the hyi^oconid toward 

 the metaconid. which is observed only in the heel portion of the tooth. 

 The anteroposterior diameter (incomplete) of Mi is 12 mm. The 

 greatest height at the anterior end of the preserved portion is 10.5 mm. 

 The greatest transverse diameter of the heel is 6.5 mm. 



.53904—38 1.59 



