﻿1 152 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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 interior from which the preceding replica was prepared, X 2, paratype, 117274a. 

 Edinburg formation {Cyrtonotella zone), just above the quarry g mile north- 

 east of Strasburg Junction, Strasburg (15') Quadrangle, Va. 



Plate 145 

 hlrnantia, howellites, l-aticrura 



A. Laticrnra latibrachiata Cooper, new species 981 



(1) Brachial interior, X 2, paratype, 117265k; (2) another brachial interior show- 

 ing the long brachiophores, X 2, paratype, 117265a; (3) brachial view, X i, of 

 the holotype, 118041a; (4-8) respectively brachial, anterior, pedicle, posterior, and 

 side views, X 2, of the holotype; (9) brachial view of another complete speci- 

 men, X 2, paratype, 1172659; (10) pedicle interior, X 2, showing form of muscle 

 area, paratype, 117265^ (11) another pedicle interior, X 3, showing apical plate, 

 paratype, 117265b; (12) apical portion of pedicle valve, X 6, showing apical 

 plate, paratype, U7265d; (13) brachial interior showing the long bladelike 

 brachiophores, X 4, paratype, 117265b. 



Arline formation (middle), north side of wagon road in glade, | mile south- 

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



B. Laticrura pionodema Cooper, new species 983 



(14) Brachial exterior of a large specimen, X 3, paratype, 117270b; (15, 16) 

 pedicle and brachial views of a young specimen, X 4, paratype, H727od; (17) 

 brachial interior tilted to the side to show the long, bladelike brachiophore, 

 X 4, paratype, 117270a; (18) same as preceding, X 4, but seen in normal view; 

 (19) posterior part of same specimen as in preceding but enlarged X 6 to show 

 cardinal process, notothyrial cavity, and brachiophores. 



Edinburg formation (base of Liberty Hall facies), 1.8 miles S. 4 W. of 

 Bethel Church, 5.9 miles due east of Harrisonburg, Harrisonburg (15') Quad- 

 rangle, Va. 



C. Laticrura magna Cooper, new species 982 



(20) Plasticine replica of the pedicle exterior, X 2, holotype, 117267a; (21) plasti- 

 cine replica of the brachial interior, X 2, prepared from paratype, 117267b; 

 (22) plasticine replica of the exterior of the brachial valve, X2, holotype, 

 117267a, counterpart of mold from which plasticine replica in fig. 20 was pre- 

 pared; (23) plasticine replica of the brachial valve, X 2, counterpart of mold 

 used to prepare fig. 21. 



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

 Quadrangle, Va. 



D. Hirnantia sagittifera (McCoy) 1005 



(24) Impression of the pedicle interior, X I, showing muscle area, hypotype, 

 23960a; (25) impression of the brachial interior, X 1, hypotype, 2396of; (26) 

 plasticine replica of the cardinalia, X i> prepared from the following; (28) im- 

 pression of the brachial interior from which the preceding replica of the interior 

 was prepared, X I, hypotype, 23960b; (27) plasticine replica of a laterally com- 

 pressed brachial exterior, X 2, showing costellate ornamentation, prepared from 

 hypotype, 2396og. 



Bala, Hirnant Valley, Wales. 



E. Howellites sp 964 



(29, 30) Plasticine replicas of the exterior and interior of a brachial valve, X 2, 

 showing the characteristic cardinalia, prepared from mold, figured specimen, 

 83859a. 



Upper Ordovician (Soudleyan), Allt Fawr, Meifod District, Montgomery- 

 shire, Wales. 



