1886.] NATtJRAL SCIENCES OP tHltADELPHIA. 225 



On p. 245 (Ex. Ed., p. 23), 3d line from top, for "Paleeocrinidse " read 

 ' ' Palmocrinoidea. ' ' 



On p. 249 (Ex. Ed., p. 27), 6th line from bottom of text, for "PI. 2 " 

 read " PI. 5." 



On p. 253 (Ex. Ed., p. 31), 8tli line from top, for "stellatus" read 

 " stellaris.^^ 



On p. 254 (Ex. Ed., p. 32), ISth line from top, before "alone" insert 

 "^er7ia;?s," 



On p. 255 (Ex, Ed., p. 33), 14th line from bottom, for " multiradiatus " 

 read "multibracMatus,''' and for "fig. 2" read "fig. G ;" also 11th line from 

 bottom for "Norwordi" read '^ Norwoodii;"' also 5th line from bottom, for 

 "to each plate" read ''or more.'^ 



On p. 263 (Ex. Ed., p. 41), 5th line from bottom, for "radials" read 

 "interradials.''^ 



On p. 277 (Ex. Ed., p. 55), 14th line from bottom, for "PI. 8" read 

 "PL 9." 



On p. 285 (Ex. Ed., p. 63), 9th line from top, for "PI. 1 " read "Pi. 4." 



On p. 287 (Ex. Ed., p. 65), 5th line from bottom, for "lovensis" read 

 "wwe?i8is." 



On p. 291 (Ex. Ed., p. 69), 12th line from top, for "anal" read "oraZ." 



On p. 292 (Ex. Ed., p. 70), 14th line from top, read "PakBocri7ioidea."' 



On. p. 294 (Ex. Ed., p. 72), last line, for "as a rale" read "always 



On p. 295 (Ex. Ed., p. 73), top line, for "Palseozic" read " Palmzoic 



On p. 300 (Ex. Ed., p. 78), at top, for " Stellerites " read " Stellerids." 



On p. 303 (Ex. Ed., p. 81), 16th line from bottom, for " Palseocrinoidse " 

 read " Pal(eocrinoidea.'^ 



On p. 307 (Ed. Ed., p. 85), 15th line from top, for " Beteocrinus " read 

 "Betcocrinus.''^ 



On p. 812 (Ex. Ed., p. 90), 6th line from bottom, for " Platynicridse " 

 read ' ' Pla tycrinidce. ' ' 



On p. 331 (Ex. Ed., p. 99), under Thylacocrinus, for "Vanuiosti" read 

 " VanniotV 



On p. 327 (Ex. Ed., p. 105), top line, for " mespiliformes " read "mespili- 

 formis.''^ 



On p. 336 (Ex. Ed., p. 114), 12th line from bottom, for "simple" read 

 "singled 



On p. 349 (Ex. Ed., p. 127), 18th line from bottom, for " Nebergangs- 

 geb.," read " Uebergangsgeb.f^ and on the 11th line, for "Dupe" read 

 "Huper 



On p. 359 (Ex. Ed., p. 137), 9th line from top, for "peristjmeal" read 

 "peristomial;'^ and 12th line, for "were" read " loas.^^ 



Mr. W. R. Billings discovered underbasals in Olyptocrinus priscus, and 

 we therefore refer the species to "Ptychocrinug.''' He also did send a dia- 

 gram of Rhodocrinus (f) asperatus, which leaves but little doubt that it is 

 a somewhat aberrant form of " AreJiwocrinus.^^ 



5 



