102 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
near the middle of the formation in the vicinity of Readyville. The following 
brachiopods have been identified: 
Acanthocrania sp. 1 
Ancistrorhyncha australis (Foerste) 
Bellimurina parviplicata Cooper 
Camarotoechia orientalis = Rostricellula compressa Cooper 
Didymelasma longicrurum Cooper 
Dinorthis deflecta = Chaulistomella lebanonensis Cooper 
Doleroides tennesseensis Cooper 
Hallina saffordi (Hall) 
Hebertella bellarugosa = Glypthorthis irregularis Cooper 
*H. borealis (Billings) = probably a misidentification 
Opikina eximia Cooper 
O. septata Salmon 
Orthis tricenaria = Hesperorthis quadrata Cooper 
Pianodema subaequata = Pionodema minuscula Willard 
Plectorthis lebanonensis Cooper 
Protozyga rotunda Cooper 
Rostricellula compressa Cooper 
R. truncata Cooper 
Skenidioides halli (Hall and Clarke) 
Sowerbyella lebanonensis Bassler 
Strophomena filitexta = S. grandimusculosa Cooper 
Triplesia subcarinata Cooper 
Zygospira circularis Cooper 
Z. elongata Cooper 
Z. lebanonensis Cooper 
Z. saffordi Winchell and Schuchert = Hallina saffordi Winchell and Schuchert 
Correlation of Lebanon formation.—The Lebanon limestone is correlated with 
the Witten limestone of the Appalachian Valley. These two formations have 
Pionodema minuscula, Doleroides, Rostricellula compressa, and abundant Zgyo- 
spira in common. The presence of Triplesia subcarinata, which is quite similar 
to T. extans, is a link to the Rockland of New York and Ontario. In addi- 
tion to the brachiopods the Lebanon and Witten share Cryptophragmus and 
Camarocladia. 
Carters formation (originally Carters Creek).—C. W. Wilson (1949, pp. 
50, 58) divides this formation into lower and upper members and drops the 
name Tyrone, from the Central Basin of Tennessee, hitherto used for the upper 
member. The lower member is generally heavy-bedded and abounds in coral- 
line animals: Foerstephyllum, Stromatocerium, Solenopora, Dystactospongia, 
and Streptelasma. The rock is calcarenite with some fine-grained layers. The 
average thickness is about 50 feet, but the range of thickness is from 27 to 95 
feet. The contact between the Lebanon and the lower Carters is disconformable. 
No brachiopods are recorded from the lower Carters. 
The upper member of the Carters formation is composed mostly of thin-bedded 
limestone, dove colored, and with the layers often separated by thin shale part- 
ings. The rock contains Tetradium cellulosum in abundance. This is the part 
referred to the Lowville of New York by Ulrich and was the basis for identify- 
