EXPLANATION OF PLATE XXIV. 



Figs. 1-8. CAMAROTCECHIA ELEGANTULA Rowley p. 177 



Pedicle, brachial, lateral and anterior views of two nearly perfect 

 specimens. Metatypes. (R. R. R.) 



Burlington white chert, Louisiana, Missouri. 



Figs. 9-28. CAMAROTCECHIA TUTA (Miller) p. 179 



9-16. Pedicle, brachial, lateral and anterior views of two nearly 

 perfect specimens. (D. K. G., No. 804.) 



Chouteau limestone, Scdalia, Missouri. 



17-20. Pedicle, brachial, lateral and anterior views of a nearly 

 perfect specimen. (D. K. G., No. 1002.) 



Lake Valley Beds, Sierra County, New Mexico. 

 21-24. Pedicle, brachial, lateral and anterior views of a nearly 

 complete specimen. (D. K. G., No. 902.) 25-28. Similar 

 views of another, larger specimen probably representing the 

 same species. (R. R. R.) 



Burlington white chert, Louisiana, Missouri. 



Figs. 29-33. CAMAROTCECHIA SUBGLOBOSA n. sp p. 180 



Pedicle, brachial, lateral, posterior and anterior views of a very 

 perfect internal cast. Holotypes. (D. K. G., No. 702.) 

 Burlington chert, Newark, Knox County, Missouri. 



Figs. 34-40. CAMAROTCECHIA CHOUTEAUENSIS (Weller) p. 176 



34-37. Pedicle, brachial, lateral and anterior views of a very per- 

 fect specimen. Cotypes. (W. M., No. 9704.) 



Chautcau limestone, Scdalia, Missouri. 



38-40. Pedicle, lateral and anterior views of a smaller example. 

 Cotype. (W. M., No. 6709.) 



Chouteau limestone, Chouteau Springs, Missouri. 



Figs. 41-60. CAMAROTCECHIA MUTATA (Hall) p. 181 



41-48. Pedicle, brachial, anterior and lateral views of two very 

 large individuals. (W. M., No. 7735.) 



Salem limestone, Spcrgcn Hill, Indiana. 



53-60. Pedicle, brachial, lateral and anterior views of three nearly 

 complete specimens. (W. M., No. 13931.) 



Salem limestone, Hull's Hollow, near Alton, Illinois. 



Figs. 61-72. CAMAROTCECHIA GROSVENORI (Hall) p. 183 



61-62. Pedicle and brachial views of a small specimen. 63. An- 

 terior view of a larger example. 64. The same enlarged 

 (x4). (W. M., No. 13932.) 



Salem limestone, Stincsville, Indiana. 



65-68. Pedicle, brachial, lateral and anterior views of a large 

 specimen. 69-72. Similar views of another specimen. (W. 

 M., No. 13935.) 



Salem limestone, Bloomington, Indiana. 



Figs. 73-81. ALLORHYNCHUS HETEROPSIS (Winchell) p. 197 



73-76. Brachial, pedicle, lateral and anterior views of a nearly com- 

 plete specimen. 77-79. Pedicle, brachial and lateral views of a 

 very perfect specimen. 80-81. Pedicle and brachial views of a 

 third specimen. (Wl M., No. 4756.) 



Kinderhook, Bed No. 4, Burlington, Iowa. 



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