XX 11 



217, 6. Read tenuitextum. 



217, 13. Read Balleyi, and haileyi. 



217, 18. ReadPalgeon. 



218, 14. For coralline read cystid. (J. C.) 



218, 30. Read 68-7.— On line 31, erase 4.— On line 32, erase 11, 12, 14, 15, 25. 



(E. W. C.) 



219, 2. Eopteris morieri was considered a vegetable organism, by one of 



the highest authorities. Count Saporta, of France. But other fos- 

 sil botanists of eminence dispute it. Sir J. W. Dawson writes to 

 me (Feb. 13, 1889), "I have examined the original specimen of 

 E. morieri^ and know that it is not a plant, but merely a plumose 

 crystallization of pyrite." "So I was told by tlie botanists in 

 Europe." (J. S. Newberry.) 

 219,38. 'RQ2id. Enaliosaiirian. 



220, 1. Add : Geol. Sur. 111., Vol. 3, 186S, p. 560. 



220, 12. Stevenson objects to my use of the popular name 'lobsters ; " but 



this dictionary is not written for men of science, nor even for 

 students of PahBontology as such, but for the people of Pennsyl- 

 vania, whose convenience in using it I consult first. 



221, 14. Erase so-called. (J. W. D.) 



221, 15. For Truro read " Grenviile and elsewhere in." (J. W. D. ) 



221, 26. Read Quaternary. 



223, 1. Read crithmifoUa. (L. L.; R. D. L.) 



223, 37. Read word. 



224, 18. Read veriieuilianuiii. 



225, 15. Read Arcliseoscyphia minganeiisis (EthmophylluTn oninganense). 



This change of name has been made by Walcott after Dr. G. J. 

 Hinde's recent revision of Walcott's Ethmophyllum group. Hinde 

 proposes Archmoscyphius minganensis, in his "Note on the 

 spicules described by Billings in connection with the structure of 

 Archmocyathiis wiiiiganensis^ Geol. Mag. Dec. Ill, Vol. V. No. 5, 

 p. 226, 1888; and paper read before the Geol. Soc, London, Dec. 

 19, 1888. He makes it a silicious sponge. The other species he 

 makes corals of the new family of Archceocyathince, the type 

 species of which is ArchcEocyathus profu7idus. For A . atlanticus. 

 Hinde establishes a new genus, Spirocyathu^, a coral of the 

 family of Archwocyathince. Ethmophyllum he retains as the 

 name of another genus of this same family. (J. D. D.) "I do 

 not agree with Walcott's new arrangement of Archceocyathus of 

 Billings. See Hinde's recent papers, &c." (J. W. D. ] 



225, 40. For Lower Cambrian read Lower Silurian ( Calciferous sandstone^ ) 



II a. (C. D. W.) 



226, 1. Read Arcliseocyatlius profundus. {Ethmophyllum prof andum.) 



(C. D. W.) 



227, 1. Read Arclite:>cyatliiis prof aiidtts. {Ethmophyllum prof undum..) 



(C. D. W., who says (Ms. Corr., Feb., 1889) that after Hinde's re- 

 searches he restores Billings' name for this fossil, but lets Eth- 

 mophylluTYi rarum and r en ss el mi cum. stand with a query mark to 

 each, for the present.) 



227, 25. Read Ethinophyllum ? rariim. (C. D. W.) 



228, 1. Read Ethmophyllum ? rensseltericuni. (C. D. W.) 



223, 22. Etoblattlna halteata, Scudder, Gerablattina balteata. Scud, 



