XV 



140, 3P. The same of this species. It should be L. C. (G. F. M.) 



141, 1, 2. Read chippeivensis. (E. W. C.) 



141, 5. Ptychoparia should be Solenopleura rol>t>ii. (G. F. M.) 



141, 6. Conocoryphe mattliewi should be Ctenocephalus and L. C. (G. 



F. M.) 

 141, 10. Ptychoparia orestes should be Solenopleura. (G. F. M.) 

 141, 11. Conocoryphe should be Ctenocephalus. This genus difters from 

 Conocoryphe in the tubercle in front of the glabella, in having a 

 smaller pygidium, &c. (G. F. M.) 

 141, 13, 14. Readmisera, tenera. (E. W. C.) 

 141,14. Ptychoparia should be Llostracus. (G. F. M.) 

 141, 20. Probably not a Ptychoparia. (G. F. M.) 



141, 24. {Salteria) is preoccupied. Therefore read (Bailiella.) (G. F. M.) 

 141, 25. Described by Hartt. 



Salteria was used by F. Wj^ville Thomson in Mem. Geol. Survey 

 (G. B.) Dec. 11, 1864, for a different genus of Palaeozoic Crustacea 

 (See pi. 11, Salteria primceva. Walcott has changed it to bail- 

 iella. in copy of Bull, sent me. (A. W. V.) 

 141, 30. Some heads nearly as this drawing have been found. (G. F. M.) 

 141,32. Does not give the attitude of the spine, which points outward. 

 Same remark applies to the thorax. (G. F. M.) 



141, 37. This and others on this page should all be marked L. C. (G. F. M.) 



142, 1. Lower Cambrian. If you speak of the aS'/^. J'o/m formation, or series, 



it is both Lower & Middle. But the fauna of it which is best known 

 is Lower. All your species from it are no doubt Lower, That the 

 St. John fauna here described is Lower Cambrian, 1. because it 

 contains Paradoxides ; 2. because it belongs to the lower half of 

 the Paradoxides beds. There are three other faunas in the St. 

 John Group which I haveonly cursorily referred to in my jDaper. 

 Two of these are Middle Cambrian. The Upper one may be Up- 

 per Cambrian. (G. F. M., Jan. 18, 1889.) 



142, 4. Described by Hartt. Fig. 2, has been inverted ; it is not a pygy- 

 dium, but a glabella ; like fig. 2b. 



142, 5. This species occurs larger than figure 2 a. (G. F. M.) 



142, 14. Read Ctenocephalus. (G. F. M.) 



142, 16, 18. Read Lower ; Z. (G. F. M.) 



142, 18. Described by Hartt. 



142, 29. Examples larger than figure 1 b, have been found. (G. F. M.) 



142, 30, 31, 33. Read in all three cases L. C. (G. F. M.) 



142, after 31, insert, Conocoryi>he trilineata, (species Emmons) Walcott, 

 Fauna of Upper Taconic of Emmons, in Amer. Jour. Sci. Vol. 

 34, Sep. 1887, Art 22, p. 197.- See Appendix. 



142, 38. Conodonts are abundant also at Cincinnati. (J. F. J.) 



143, 1. Read Conosticlius. (E. W. C.) 



143, 39. Read crebristriata. (O. B. Harden.) 



144, 11. For septune read septum. 



144, 40. Insert C. magniflca, and other species described by Spencer, in 

 Bull. Miss. University, in 1884. (J. W. D.) 



144, 40. Insert Conularia micronema. Meek ; and C. newberryi, Meek. 

 Pal. Ohio, Vol. 2, p. 316, pi. 18, figs. 1, 2 ; among the most charac- 

 teristic fossils of the Cuyahoga shale in Ohio. (J. S. N.) 



