791 



Portlandica, Ast., not identified, 

 pulchra, Desk., Cytb. elegans, by error. 

 pulcherrima, Deslt,., Venerup. 15. pi. 165. f. 28. 

 quadrans, Gould, Ast. 14. pi. 167. f. 5. 

 robusta, Sowerby, Pet. 14. pi. 166. f. 16, 17. 

 roccellaria, v. Petricola, sp. 12. 



rotunda, Gmel., takes precedence of Veri. papilionacea, 2. 



rugosa, v. Petricola, sp. 7. 



rugosa, Desk., Venerup. 23. pi. 165. f. 25. 



ruperella, v. Petricola, sp. 12. 



Scotica, Ast. sulcata, sp. 1. 



semilamellata, LamL, Pet. 17. pi. 166. f. 23. 



semisulcata, Leach, Ast. 8. pi. 167. f. 16. 



semisulcata, Ast. sulcata, sp. 1, Ast. elbptica, sp. 2. 



serrata, Desk., Pet. 2. pi. 166. f. 11. 



serrata, v. Venerup., sp. 5. 



solida, Sowb., Pet. 11. pi. 166. f. 9. 



spbasrisulca, Desk., Ven. sp. 111. App. pi. 168. f. 231. 



siliqua, Desk., Venerup. 25. pi. 165. f. 27. 



simplex, Sowb.jun., Cytb. App. sp. 125. pi. 168. f. 217. 



striata, Ast. compressa, 12. 



striata, v. Petricola, sp. 12. 



subcequilatera, Sowb.jun., Ast. 6. pi. 167. f. 13. 



subglobosa, v. Venerup., sp. 28. 



sulcata, Costa, Ast. 1. pi. 167. f. 1, 2, 3. 



sulcata, Gray, by error, Cytb. plebeja. 



tenuis, v. Petricola, sp. 7. 



triangularis, Mont., Ast. 13. pi. 167. f. 9. 



triquetra, Ast. triangularis, 13. 



tumens, Gmel., Cytb. striata, by error. 



tumida, Sowb.jun., Venerup. 27. pi. 165. f. 34, 35. 



typica, Jonas, Pet. 13. pi. 166. f. 21. 



undata, Gould, Ast. 4. pi. 167. f. 12. 



undulata, Bom, takes precedence of Ven. rimosa, 11. 



ventricosa, v. Petricola, sp. 5. 



vulgaris, Cyprina Islandica, 1. 



