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EXPLANATION OF PLATES. 



PLATE XXX. 



FIG. 



1. Ortliuccras f/ainkaenais nfi.nox. (iso. m). Nat. size. Gamka Poort. 

 1«. Ditto. Transverse section. 



2. Ovthoceras hokkeveMenais sp. nov. (No. 173). Nat. size. Gamka Poort. 



3. Plenrotoinaria aff. kayseri Ulrich (No. 70/"). Nat. size. Hottentot's Kloof. 



4. Bellcrophon cf. morganianus Hartt and Eathbun. Side view (No. 110), x li. 



Gamka Poort. 

 Aa. Ditto. Back view (No. 110), x IJ. 



5. Bellerophon {Ducaniella) aff. trilobatuit Sowerby. Side view of distorted 



specimen (No. 213). Nat. size. Gydo Pass. 

 G. BcUerojihon (Bucaniella) et rcissi Clavke. Side view (No. 107), x IJ. lioad- 

 cutting, north of Whupperthal. 

 6rt. Ditto. Back view (No. 107), x IJ. 



7. BelleToi)Jiou {Plectonotiif<)iif(. salteri Gm-'ke. Side view (No. 108), x 2. Road- 



cutting, north of Whupperthal. 

 7«. Ditto. Back view (No. 108), x 2. 



8. I.oxonema sp. (No. 164), x 2. Gydo Pass, Ceres. 



9. Tentaculites baini sp. nov. (No. 181), x IJ. Gydo Pass, Ceres. 



10. Conularia qiiichua Steinmann-Doderlein (No. 72). Nat. size. Gydo Pass,. 



Ceres. 

 10(1. Portion of surface of ditto (No. 72), showing ornamentation, x 10. 



11. Cointhirid cf. acutu Ecemer. Portion of surface showing ornamentation 



No. 7-5), x 10. Gamka Poort. 



