Blancan Carnivore Trigonictis 
5 
and associated incomplete right ramus with Pj and Pj, and 
incomplete P^ and Mj-; all teeth on both sides heavily worn, 
collected by Larry Roberts. 
Smith Mill Run, near Goldsboro, Wayne Co., North Carolina 
USNM 306507, left mandibular ramus lacking anterior extremity 
and part of coronoid process, with Pj - Mj well preserved and 
with part of canine alveolus, collected spring 1980 by Donnie 
Bailey. 
Type locality. — “collected by James T. Thomas near his residence in 
Charles County, Maryland, not far from the Patuxent River” (Cope 
1868b: 138). Cope described several taxa of fossil vertebrates, mostly 
cetaceans, from the same source, but never published precise field data. 
Efforts made through the years to determine the exact locality and 
horizon in Charles County, and the identity of James T. Thomas, have 
been inconclusive thus far (see Dryden and Overbeck 1948:57, 90; Kel- 
logg 1955: 143, 1965:48, 1968: 105). Cope ( 1868a, b) referred to the deposit 
as postpliocene in age based on the fauna, a “common peccary” (later 
identified as Cynorca proterva Cope, a Miocene species; see Woodburne 
1969), a “Manatus” (specimen has not been relocated, but sirenian 
remains are fairly common in the Calvert Formation but have not been 
substantiated from later beds in the area; see Kellogg 1966), and the 
Galera. Beds of the marine Miocene Chesapeake Series are overlain in 
the area by the Brandywine Formation, also termed “upland deposits,” a 
thin (10-30 feet, 3-9 m) mantle of gravel, sand and loam, mostly fluviatile 
in origin, deposited by the southwestwardly migrating channel of the 
Potomac River, and variously regarded as late Miocene, Pliocene and/or 
early Pleistocene in age, although lacking diagnostic fossils (Clark 1915; 
Hack 1955; Schlee 1957; Glaser 1968; Owens and Denny 1979). Although 
Cope’s other “postpliocene” fossils probably came from the Miocene 
Calvert Formation, his Galera macrodon more likely came from the 
overlying “upland deposits,” judging from its taxonomic affinities. 
It should be noted in passing, especially in view of the more recent 
recovery of referred material in Florida, that Reig (1957:44-45) mistak- 
enly ascribed the original material of Trigonictis macrodon to Florida 
rather than Maryland. 
Distribution. — In addition to the type locality (Fig. 1, loc. 7) in 
eastern Charles County, near the Patuxent River, Maryland, the material 
here referred to Trigonictis macrodon is known from the following 
localities: 
White Bluffs, east side of Columbia River, Franklin Co., southcen- 
tral Washington, some 10-30 mi. (16. 1-48.3 km) N of Richland (Fig. 1, 
loc. 1). UW locality A3027. Ringold Formation; age very early Blan- 
