﻿Il68 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I2J 



Plate 162 



Dalmanella, Paurorthis, Pionodema 



Page 



A. Pionodema conradi (N. H. Winchell) 988 



(1) Brachial view of a complete specimen, X I, hypotype, 117325a; (2-6) respec- 

 tively anterior, pedicle, side, brachial, and posterior views of the same specimen, 

 X 2, showing details of the ornamentation. 



Platteville formation (McGregor member), on U. S. Highway 52, 2 to 3 miles 

 north of Fountain, Goodhue County, Minn. 



B. Pionodema tenncsseensis Cooper, new species 995 



(7-1 1 ) Respectively anterior, posterior, side, brachial, and pedicle views of a com- 

 plete specimen, X i> holotype, 117340a; (12) brachial view of a somewhat im- 

 perfect specimen, X 2, showing ornamentation, paratype, 117340c. 



Hermitage formation (base), on the east side of U. S. Highway 70S and 41 

 near its junction with Spence Lane, 4.3 miles southeast of Nashville, Hermitage 

 (15') Quadrangle, Tenn. 



C. Dalmanella rara Cooper, new species 949 



(13) Brachial view of a young, complete specimen, X 1, paratype, 117362b; 

 (14-18) respectively anterior, side, posterior, brachial, and pedicle views, X 2, 

 of the same specimen. 



Curdsville formation, on Tennessee Highway 33, $\ miles northeast of May- 

 nardville, Maynardville (T.V.A. 145-SE) Quadrangle, Tenn. 



D. Paurorthis catawbensis Butts 964 



(19, 20) Side and brachial views of a large complete specimen, X l, hypotype, 

 117278a; (21) same, X 2, to show ornamentation; (22) interior of the brachial 

 valve showing the cardinalia and median ridge, X 2, hypotype, 117278b; (23) 

 impressions of the interior of two pedicle valves showing the muscle scars, X 2, 

 hypotype, 117275. 



Blockhouse formation, 1.6 miles south-southwest of Toqua School, Vonore 

 (T.V.A. 139-SW) Quadrangle, Tenn. 



E. Pionodema camerata Cooper, new species 986 



(24) Plasticine replica of the exterior of an imperfect brachial valve, X 2, para- 

 type, 117343b; (25) plasticine replica of the exterior of a small pedicle valve, 

 X 2, paratype, 1173431; (26) impression of the interior of a large pedicle valve 

 showing the muscle scars and pallial impressions, X 2, paratype, 117343a; (27) 

 impression of the brachial interior, X 2, showing notothyrial chamber and long 

 shaft of cardinal process, paratype, 117343m; (28) plasticine replica of the 

 brachial interior showing median ridge, and notothyrial chamber, X 2, taken 

 from paratype, 117343c; (29) side view of the brachial interior impression, X 2, 

 paratype, H7343J ; (30) impression of a young brachial valve interior, X 2, 

 showing notothyrial chamber, paratype, 117343-0; (31) plasticine replica of the 

 brachial interior, X 2, prepared from mold, holotype, 117343k, showing elongated 

 notothyrial chamber; (32) small slab showing impressions of pedicle and brachial 

 valves, X I, paratype, 117343a. 



Sevier formation (Bacon Bend member, top, just under Bays red beds), 

 i mile northeast of Fourmile Church, Tallassee (T.V.A. 139-SE) Quadrangle, 

 Tenn. 



Plate 163 

 Aporthophyla, Eichwaldia, Ingria 



A. Eichwaldia subtrigonalis Billings 947 



(1-3) Brachial, pedicle, and side views of a complete specimen, X I, hypotype, 

 92369d; (4, 5) exterior and interior of the posterior part of a pedicle valve, X 2, 



