﻿1228 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 



Page 

 (24, 25) Respectively X 1 and X 2 enlargements of a brachial interior showing 

 septa and cardinalia, hypo type, 1 17830. 



Lebanon formation (Doleroides zone), cut on U. S. Highway 70N, opposite 

 Fairview Service Station, \ mile west of Rome, Smith County, Tenn. 



C. Macrocoelia magna (Butts) 894 



(29) Brachial view of a complete specimen, X I, hypotype, 117778. 



Benbolt formation, £ mile south of Gate City, Gate City (T.V.A. 188-NE) 

 Quadrangle, Va. 



Plate 240 

 Opikina 



A. Opikina varia Cooper, new species 922 



(1) Pedicle exterior, X 1, paratype, 71350a; (7) surface ornamentation of the 

 brachial valve, X 4, paratype, 71350b. 



Carters formation, quarry 0.3 mile northeast of Gate City, Leeds (15') Quad- 

 rangle, Ala. 

 (2, 3) Respectively X 1 and X 2 enlargements of the brachial side of a complete 

 specimen, holotype, 117848a; (5) brachial interior, X 2, showing septa and 

 cardinalia, paratj'pe, 117848b. 



Horizon and locality same as preceding. 

 (4) Pedicle interior showing the form of the muscle scars, X 2, paratype, 117847a ; 

 (6) brachial interior showing pallial marks and cardinalia, X 2, paratype, 

 117847c. 



Dryden formation (30 feet above marble), road along Little Sycamore Creek, 

 \ mile northeast of the west edge of the Howard Quarter (T.V.A. 162-NW) 

 Quadrangle, Tenn. 



B. Opikina eximia Cooper, new species 906 



(8-11) Respectively pedicle, side, posterior, and anterior views of a complete speci- 

 men, X 1, holotype, 117806a; (12) brachial view of another complete specimen, 

 X 1, paratype, 117806b. 



Lebanon formation {Doleroides zone), cut on U. S. Highway 70N, opposite 

 Fairview Service Station, 2 mile west of Rome, Smith County, Tenn. 

 (13) Brachial view of a large individual, X I, paratype, 117803; (14) posterior 

 of the preceding specimen, X 3, showing angular pseudodeltidium. 



Lebanon formation (upper half), cut on U. S. Highway 41, f mile south of 

 Knox Branch, 9 miles southeast of Murfreesboro, Rutherford County, Tenn. 

 (15, 16) Respectively X 1 and X2 enlargements of the pedicle interior showing 

 details of the muscle scars and pallial marks, paratype, 1 17805. 



Lebanon formation (middle), ridge 3 miles east of Murfreesboro, Rutherford 

 County, Tenn. 



(17) Brachial interior showing thickened subperipheral rim, muscle scars, and 

 cardinalia, X I, paratype, 11 7802. 



Lebanon formation {Doleroides zone), east end of the bridge over Round 

 Lick Creek on U. S. Highway 70N at Rome, Smith County, Tenn. 



(18) Pedicle interior showing flabellate muscle area, X I, paratype, 117804a. 

 Lebanon formation (lower), Columbia, Maury County, Tenn. 



Plate 241 

 Opikina 



A. Opikina expatiata Cooper, new species 907 



(1-5) Respectively posterior, anterior, side, pedicle, and brachial views of a large, 



