﻿1 178 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



Page 

 showing the muscle scars, pallial impressions, and slots produced by dental 

 plates, holotype, 117300c, counterpart of preceding. 



Oranda formation, 0.6 mile northwest of Linville Station, Broadway (15') 

 Quadrangle, Va. 



Plate 176 



Glyptambonites, Palaeostrophomena 



A. Glyptambonites musculosus Cooper, new species 715 



(1) Impression of the pedicle interior, X i ( the mold from which the plasticine 

 replica on pi. 171, B, fig. 15, was prepared, paratype, 117390a; (2) posterior of 

 the preceding, X 2, showing the impression of the muscle area with its long 

 diductor scars; (3) posterior of an incomplete specimen, X 2, showing interareas 

 of both valves, chilidium, simple cardinal process, and pseudodeltidium, para- 

 type, U7388d; (4) impression of part of the posterior of the brachial valve 

 showing genital markings and muscle scars, X 2, paratype, 117388c; (5) plasti- 

 cine replica of the cardinalia of the brachial valve, X 2, prepared from the 

 preceding mold, showing septa, cardinal process, and brachiophores. 



Oranda formation, 0.6 mile northwest of Linville Station, Broadway (15') 

 Quadrangle, Va. 



B. Palaeostrophomena ? rugosa Cooper, new species 705 



(6, 7) Respectively X 1 and X 2 enlargements of a brachial valve, paratype, 

 117379a; (8) exterior of pedicle valve, X 2, holotype, 117379c; (9) brachial 

 view, X 2, paratype, 117379c; (10) fragment of pedicle valve showing muscle 

 area, X 2, paratype, H7379f; (11) impression of the brachial interior, X 3, 

 paratype, H7379g; (12) plasticine replica of the brachial interior, X 3, prepared 

 from the preceding. 



Botetourt formation, south side of U. S. Highway 60, 1 mile northwest of 

 Lexington, Lexington (15') Quadrangle, Va. 



Plate 177 



TlTANAMBONITES 



A. Titanambonites amplus (Raymond) 7 T 8 



(1-5) Respectively posterior, side, anterior, exterior, and interior views of the 

 pedicle valve, X 1, hypotype, 11 7422; (6, 7) two views of the pedicle interior, 

 one tilted to show the anterior ends of the pallial trunk distributaries, the other 

 tilted to show the delthyrial cavity and the muscle area, X T i, same hypotype; 

 (8) interior of the same hypotype, X 2, showing the pallial marks. 



Arline formation (near top), south side of wagon road in glade, \ mile south- 

 east of Friendsville, Concord (T.V.A. 138-SW) Quadrangle, Tenn. 



(9, 10) Respectively X 1 and X 2 enlargements of a brachial interior showing the 

 pallial trunks and adductor field, hypotype, 117418. 



Arline formation, \ mile south of McMullens, Meadow (T.V.A. 139-NW) 

 Quadrangle, Tenn. 



B. Titanambonites sp. 1 723 



(n) Exterior of a large brachial valve, X 1, figured specimen, 1 17432. 



"Lenoir" formation = Little Oak (20 feet under the Pratt Ferry formation), 

 0.2 mile southeast of Pratt Ferry, Blocton (15') Quadrangle, Ala. 



Plate 178 



Titanambonites 



A. Titanambonites convexus Cooper, new species 719 



(1-4) Respectively posterior, pedicle, brachial, and side views of a nearly complete 



