ERR^T^. 



Page 1, under Spirifbk, add Plates xxvii and xlvi. 



Page 43, under Cyktina, add Plate xxv ; change xxvii to xxviii. 



Page 47, under Striugothyris, add Plates xxv and xxxix. 



Page 51, under Spiriferixa, add Plate xxix. 



Page 54, under Amboocelia, add Plate xxix. 



Page 5S, under Whitfieldella, change Plate xlviii to xl. 



Page 61, under Hyattella, change Plate xlviii to xl. 



Page 63, under Hindella, adil Plate xlix. 



Page 65, under Meristina, change Plate xlvii to xli. 



Page 70, under Merista, change Plate xlvi to xlii. 



Page 73, under Meristella, change Plates xliv and xlv to xliii and xliv. 



Page" 8*?, under Camarospira, change Plate xlii to 1. 



Page S3, under Atuyris, add Plate Ixxxiii. 



Page 108, under Ruyncuospira, add Plate xlix. 



Page 112, under Ptychospira, add Plate Ixxxiii. 



Page 115, under Edmetria, add Plate Ixxxiii. 



Page 124, under Trem.vtospira, add Plate Ixxxiii. 



Page 134, under Ccelospira, add Plates lii and Ixxxii. 



Page 138, under Vitdlixa, change Supplementary Plate to Plate Ixxxii. 



Page 141, under Anabai.a, insei-t Plate Ixxxii. 



Page 142, under Nucleospira, add Plate Ixxxiv. 



Page 152, under Glassia, insert Plate Ixxxiii. 



Page 154, under Zygospira, change Plate Iv to liv, and add Plate Ixxxiii. 



Page 157, under Catazyga, change Plate Ivi to Iv. 



Page 161. undei- Atry'pixa, add Plate Ixxxii. 



Page 163, under Atrypa, change Plate liv to Iv. 



Page 182, under Rhynchotrema, add Plate Ixxxiii. 



Page 189, under CAMAROTOiCHTA, add Plate Ivi. 



Page 202, under Pugnax, add Plate Ixii. 



Page 230, under Lycopiioria, change Plate Ixiii to Ixii. 



Page 249, under Stricklandinia, add Plate Ixxxiii. 



Page 252, under Ampiiigesia, add Plate Ixxvi. 



Page 286, under Cryptonella, add Plates Ixxix and Ixxxi. 



Page 293, under Dielasma, add Plate Ixxx. 



