﻿part ii chazyan and related brachiopods — cooper 1201 



Plate 205 



sowerbyella 



Page 



A. Sowerbyella socialis Cooper, new species 794 



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

 plete specimen, X 2, paratype, 117526a; (6) enlargement of the ornamentation 

 of a brachial valve, X 6, paratype, 117526b. 



Wardell formation (Hesperorthis zone), Lloyd Carter's barn, 0.8 mile by 

 road northeast of Rye Cove School, Clinchport (T.V.A. 188-NW) Quadrangle, 

 Va. 



B. Sowerbyella eximia Cooper, new species 781 



(7, 8) Impression of the pedicle interior and a wax replica prepared from the 

 impression, showing muscle scars, X 2, paratype, H7492g. 



Martinsburg formation (part with Brongniartella and referable to the Salona 

 formation), on Virginia County Highway 617 = 900, 0.15 mile north of Green 

 Mount Church, Broadway (15') Quadrangle, Va. 



C. Sowerbyella punctostriata ( Mather) 792 



(9-13) Respectively anterior, posterior, brachial, pedicle, and side views of a com- 

 plete specimen, X 2, hypotype, 117514a; (23) brachial interior, X 3, showing 

 cardinalia, septa, and pallial marks, hypotype, 117514b. 



Barnhart formation, Koch Valley School, on U. S. Highway 61, NE. corner 

 SW^SWi sec. 6, T. 41 N., R. 6 E., 2 miles south of Barnhart, Kimmswick 

 (15') Quadrangle, Mo. 

 (14) Brachial view of a complete specimen, X I, hypotype, 117513a; (15-19) re- 

 spectively brachial, anterior, side, pedicle, and posterior views of the preceding 

 specimen, X 2, showing ornamentation ; (22, 24) respectively X 2 and X I 

 enlargements of the brachial interior, showing cardinalia, hypotype, 117513b. 



Barnhart formation, 0.1 mile south of Salt River on U. S. Highway 61, north 

 of New London, Ralls County, Mo. 

 (20, 25) Exterior and interior views of a pedicle valve, X 1, hypotype, 117515a; 

 (21) exterior of a brachial valve, X I, hypotype, 117515b. 



Barnhart formation (upper), old road about 1 mile northwest of Chicago Sum- 

 mer School Camp, NW|SWi sec. 32, T. 37 N., R. 9 E., Weingarten (15') 

 Quadrangle, Mo. 



Plate 206 

 Sowerbyella, Titanambonites 



A. Sowerbyella angulata Cooper, new species 776 



(1-5) Respectively pedicle, posterior, anterior, brachial, and side views X 1. of the 

 holotype, 71538a ; (6) the same, X 2, to show the ornamentation ; (7) interior of 

 the brachial valve, X 2, paratype, 117479b. 



Hermitage formation, Cliff Avenue section, Clifton Terrace, Birmingham, 

 Birmingham Special (15') Quadrangle, Ala. 



B. Sowerbyella vulgata Cooper, new species 801 



(8) Brachial view, X 1, of a wide paratype, 117541a; (9-12) respectively side, 

 brachial, anterior, and pedicle views, X 2, of the preceding. 



Bromide formation (Mountain Lake member — upper 10 feet), on Spring 

 Creek, sec. 17, T. 2 S., R. 1 W., Murray County, Okla. 



C. Titanambonites ampins ( Raymond) 718 



(13) Impression of the interior of a pedicle valve showing long diductor scars and 

 the pallial trunks at their anterior ends, X I, hypotype, 117423b. 



Fetzer tongue, at the bend of the road 0.6 mile south-southeast of Harrison- 

 Chilhowee Academy, Walden Creek (T.V.A. 156-SW) Quadrangle, Tenn. 



