WM1TEWE6 J APPENDIX. 425 



Page 232. 

 For " Rhynchonella castanea, Meek" — read : 



Hypothyris castanea, Meek. (Sp.) 



And, add to the list of references : 



Liorluinehus castaneus, Hall and Clarke. 1895. Pal. N. York, vol. VIII., pt. 2, pi. 59, 



figs. 28 and 29. 

 St/pothi/ris castanea, Schuohert. 1897. Synops. Amer. Foas. Brachiop,, p. 233. 



Page 234. 



For " Pentamekus galeatus, Dalman. Var." — read : 

 Gypidula galeata (Dalman). Var. 



And, add to the list of references : 



Sieberella tialeatn. Kail and Gluvke. 1893. Pal. N. York, vol. VIII., pt. 2, p. 246, fig. 



175, pi. 72, figs. 7-13. 

 Gypidula ;ialeata, Schuchert. 1897. Synops. Amer. Foss. Brachiop., p. 220. 



Page 235. 



For " Cryptonella Calvini ? Hall and Whitfield " — read : 

 Dielasma Calvini 1 Hall and Whitfield. 



And, add to the synonymy and references : 



Dielasnui Calvini, HaWA^d Clarke. 1893. Pal. N. York, vol. VIII., pt. 2, p. 296, pi. 

 80, figs. 20-22. 



In their remarks upon the genus Dielasma, King (op. cit.) Professors 

 Hall and Clarke say : " the Cryptonella Calvini of Hall and Whit- 

 field, of the middle Devonian of Iowa, is an excellent representative of 

 the early forms of this genus.'' 



PART 4. 

 Page 270. 



Line 13, from the bottom, for "length" read "breadth." 



