96 Upper Cretaceous Fauna from Tennessee [294 



cies and also from more than one locality, as is shown in the 

 literature by described species which have been questionably 

 assigned generically. The genera Solariella, Liotia, Teinos- 

 toma, and Columbellina have not been previously reported 

 from North American Cretaceous, and Hemifusus and Lit- 

 torina have not been previously reported from the Cretaceous 

 of the Eastern United States. A typical Busycon or Fulgur 2G 

 is for the first time found in Cretaceous sediments. The 

 Volutes are profusely developed, being represented by six 

 genera and eighteen species. 



Among the Cephalopods both the nautiloids and ammonoid 

 orders are present and represented by abundant large well- 

 preserved specimens. It is interesting to find the remains 

 of the most primitive order of Cephalopoda which ranges 

 from the Paleozoic to the Eecent associated with abundant 

 remains of the most highly complex and degenerate cephalo- 

 pods, indicating that both thrived under the same conditions, 

 yet the latter became extinct and the former continues to 

 live. The family Nautilidae is represented by one species 

 of the genus Eutrephocems. The most common cephalopods 

 at Coon Creek are the Baculites and Turrilites of the family 

 Lytoceratidae. Baculites is profusely developed and proba- 

 bly includes three species. The Cosmoceratidae include one 

 species of the genus Scaphites. 



Conditions must have been especially favorable for mollus- 

 can life in the Upper Cretaceous sea in which the members 

 of the Coon Creek assemblage grew. A glance at a tray of 

 specimens impressed the observer- with the fact that the shells 

 are the remains. of once-flourishing animals. Very many of 

 the shells are thick, stout and of imposing dimensions. Evi- 

 dently they belonged to robust, healthy and well-fed organ- 

 isms. The bivalve with the greatest lateral dimensions is a 

 species of Inoceramus which was probably 15 inches in maxi- 

 mum diameter. One species of Cardium is 5 inches in length 



26 Bruce Wade, 1917, Am. Jour. Sci., vol. xliii, no. 256, p. 293, 

 figs. 1 and 2. 



