﻿IO78 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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 paratype, 110380b; (19) brachial interior, X 2, showing adductor field and car- 

 dinalia with a slight development of accessory cardinal process ridges, paratype, 

 110385c. 



Bromide formation (Mountain Lake member — zone 5 of Decker), Rock 

 Crossing of Hickory Creek, about center sec. 35, T. 5 S., R. I E., Criner Hills, 

 Carter County, Okla. 



Plate 61 

 Chaulistomella, Dinorthis, Multicostella 



A. Multicostella convexa, Cooper, new species 418 



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

 preserved individual, X 1, paratype, 116986a; (6) brachial interior, X 1, para- 

 type, 116986b. 



Bromide formation (Mountain Lake member), top of green shale sequence, 

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



B. Multicostella rectangulata Cooper, new species 425 



(7, 10) Respectively pedicle and brachial views of a medium-sized specimen, X 1, 

 paratype, 1 16990; (8, 9) respectively brachial and pedicle views of a small 

 specimen, X i, paratype, 123456. 



Yellow limestone on 25-foot sandstone at base of Eureka group, ridge 2 miles 

 north of Martin Ranch, Roberts Mountains (1°) Quadrangle, Nev. 



C. Multicostella parallela Cooper, new species 420 



(11-15) Respectively side, pedicle, posterior, anterior, and brachial views of a 

 fully grown specimen, X I, holotype, 116989b. 

 Same horizon and locality as preceding. 



D. Chaulistomella mira Cooper, new species 439 



(16-20) Respectively anterior, posterior, side, pedicle, and brachial views of a per- 

 fect specimen, X I, holotype, 117001a; (21) pedicle interior, X I, paratype, 

 1 17001c; (22) brachial interior, Xi, paratype, H700id. 



Bromide formation (Mountain Lake member — cystid bed), first dam on Spring- 

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



E. Dinorthis transversoides Cooper, new species 400 



(23, 24) Respectively X 1 and X 2 enlargements of a brachial exterior, paratype, 

 110341c; (25, 26) respectively X 1 and X 2 enlargements of the pedicle exterior, 

 holotype, 110341b; (27) another pedicle exterior, X 1, paratype, 110341a; (28) 

 another brachial exterior, X i, paratype, H034id. 



Dryden formation, 1 mile west of Lone Mountain, Tazewell (T.V.A. 154-NE) 

 Quadrangle, Term. 



Plate 62 

 Multicostella 



A. Multicostella planosulcata Cooper, new species 421 



(1, 2, 4, 5) Respectively brachial, side, anterior, and pedicle views of a complete 

 specimen, X I, holotype, 110423a. 



Arline formation, 1 mile east-northeast of Friendsville, Louisville (T.VA. 

 138-SE) Quadrangle, Term. 

 (3) Pedicle interior, X I, paratype, 110412a. 



Arline formation (middle part), north side of wagon road in glade, \ mile 

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



B. Multicostella plena Cooper, new species 422 



(6-10) Respectively brachial, pedicle, posterior, side, and anterior views, X h of 



