vm 



697, 698, 699. For Icht. & Iclithy, read Ichnology. 



699, next to last line. Read Mytilarca, 



700, 2. Read Plethoriiytilus. — 20. Read stiletto. 



703, J.. Figure 1 represents a species of P<5t/o?2tw5, Cope. (Orton.) 



705, 12. Add, Abundant also near Cincinnati. CE. W. C.) — 18. Read 

 Raphistoma. (Whitfield.) — 25. The middle figure is a /S'caZt^e^, (Whit- 

 field.) 



706, 6. Erase 3 and 42. —1. Read 118-25. —8. Read township. 



707, Figure under P. d:ocews, is a /S'caZi^es. (Whitfield.) — Line 10. Read 

 primum. (E. W. C.) 



711. Figure of P. laurentina (d) is a Raphistoma. The same is true of 

 P. progne, p. 714; and P. rotiiloideSy p. 715 ; also of P. subtilistriata (fig. 

 12) p. 717 ; and Emmons' figure 1, on p. 721. (Whitfield.) — Line 19. Read 

 leavenw^orthanum. — 21. Read lenticulare. 



715. 12. Read solarioides. (E. W. C.) 



718, 38. Read White & Whitfield's P. mississipiensiSj which it certainly is. 

 (Whitfield.) 



719,7. 'ReeidleaveQiivorthanum, (E. W. C.) 



720, 13. Figure 9, a Holopea, (Whitfield.) H. D. Rogers assigns it to 

 the Auroral^ and therefore Calciferous. (E. W. C.) — 28. Read Holopea. 

 — 31. "Wrongly identified. P. unisulcata is a Platystoma and comes 

 from Z7. Held, limestone Villa. (Whitfield.) 



722, 1. Read PleurMomarias. — 11. Read miser a. (E. W. C.) — 40. 

 Erase 13. (E. W. C.) 



723, bottom line. Insert: "and in strata of Cincinnati [Hudson Biver] 

 age on Little Magusketa river, Iowa. Fragments referred to this genus are 

 noted by Walcott in Geology of the Eureka District, Nevada. Should not 

 the genus be rather TurrilepasV (J.F.James.) — 19. l^G2^d. gracilimus. 

 (E. W. C.) 



724, 3. For Trilobites read Crustaceans. 



727, 17. Read cestrensis. (E. W. C.) 



728, 16. Read varsovensis. (E. W. C.) 



730,6. Read Iciinology of New England. — 8. Read hind foot. 



731, 7. Read/tfcsi/orme. (E. W. C.) — 16. Read nitidulum. 



732, 2. For '* two orders " read rather " two sub-classes. The families are 

 more numerous than those given in the text. Monticuliporidce is an im- 

 portant family of sub-class Alcyonari a. The Graptolitidce are considered 

 as Hydrozoa by most naturalists, this being a class of equal rank with 

 Anthozoa, the two with Ctenophora forming the Coelenterata. (See 

 Encycl. Brittan. 9th Ed. Vol. VI.) (Jos. F. James.) 



634, 1. Read piasensis. — 7. Read Piasa creek. (E. W. C.) 



735. 13. Insert : foraminiferous organism. 



736, 7. For Porites read Astrocerium venustum. Hall. And for Porites 

 on p. 737 read Stromatopora concentrica, Goldf. (Whitfield.) 

 739, 6. Read casei. (J. F. James.) — 22. Read Palceocrinus. 



742, 1. This species has been since referred to Cope's genus Lagomys. 

 (Upton). — Bottom. Read gnawed. 



743. P. cristatay P. gregaria^ and P. seelyi, (p. 744) are called Isochilina 

 byT. R. Jones. 



747, 24. Read Chemungense. 



748, 14. Read exanthema. (E. W. C). 



749, 23. Erase -3.-24. Erase 6 -8. —25. Erase 4. —26. Read Losh. —29. 

 Read 80-1, 80-6. —31. Read 80-6. (E. W. C). 



