XXX 



331, 3. Erase the 1. 



27. Read page 447, fig. 13, 



332, 7. Read paralelum, new species. 



12. An error. Pisgah hill is Hamilton. L. potens was not found in Perry 

 Co., Pa. The fossil here referred to is probably Actinodesina 

 subrectum. 59-9 of the Cat. is a brachiopod. (E. W. C.) 



335, 1. Liesleya grandis, Lesq. has been omitted. See Geol. Sur. Pa., 



Coal Flora, page 143, plate 25, figs. 1, 2, 3. (L. Lesq.) 

 5. All the figures given under Liclias tooltoni belong to Lichas 



breviceps, on page 337 further on. To their place here on page 



335 must be transferred all the figs, on page 337, except fig. 12 



which is of an unknown species. (R. P. W.) 

 9. For chin-piece read lip. (Matthew.) 



336, 1. Read : probably an arachnid of the genus Anthracomartis^ &c, 



(Scudder.) 



4. Read 736, for 236. 



5, Read Platynotus.—l^ ote, that the printer has shaved off both sides 



of the figure to fit the page. 



337, 1. All the figures here j)laced under L. brevicens belong to L. boltoni, 



except fig. 12, which Hall says is of an unknown species. (R. 

 P. W.) 

 3. Read plate 36. — The text here relates to the figures on p. 335. (Mat- 

 thew. ) 



339, 6 to 13. Figures omitted. 



340, 35. Read Millerstown. 



36. Erase 46-5. (E. W. C.) 



37. Read Delville. 



341, 1. Read obsoletus. (E. W. C.) 

 2. Read rugistriata. (E. W. C.) 



20. Liimiia^a humilis should be transferred hither from page 351, 



where it has been mispelled Liiniisea. 

 26. A blunder in proof reading Report T2. It should be Dalmania 



limulurus. (J. J. S. ) 

 30. Read Linguella acuininata, and transfer the figures and text to 

 that name on page 350. ( Walcott ; Matthew. ) 



Read Lingulella antiqua. (Matthew.) 



Vanuxem. Fig. upside down. 



Read Lingiilella dawsoiii, Matthew. I follow Walcott in making it 

 Middle Cambrian. Matthew would correct it to Lower Cam- 

 brian ; and so other cases on page 345, 351. 



Read Bedford. 



Read 60-8. 



Read concentric. 



Read papillae. 



Read acutirostra. (E. W. C.) 



Note. — This may be a rule, but there are more exceptions than 

 otherwise. (R. P. W.) 



Read Triarthrus. 



Read Monog. Scot. Carl Bracli. ; Ohio, &c. 



Insert Lingula spathata. Hall, Pal. N. Y. Vol. 3, 1S39, Loiv ?r Hel- 

 derberg ; three specimens of which were gathered by Clay pole 

 at station 40, at Shipping Rocks, west of Mexico P. O., Perry 



342, 



20. 



343, 



2. 



344, 



]. 



345, 



4. 



346, 



13. 





24. 





28. 





36. 





40. 



347, 



17. 





22. 





31. 



