ERRATA. 



Page 398— 10th line from top, for "three more or less imbricated" read "three, more or less, 



imbricated." 

 Page 401 — 19th line from bottom, omit comma between "angle" and "about." 

 Page 40-1 — 10th line from top, for "polish" read "polished." 

 Page 408 — 13th line from bottom, for "lightly" read "slightly." 

 Page 4U — 18th line from bottom, for "which" read "while." 

 Page 413 — 1st line from top, for "greatly" read "gently."' 

 Page 415 — 3d line from top, for "concave" read "clavate." 

 Page 416 — 15th line from top, for "Petolodus'' read "PeUodus." 

 Page 417— 9th line from bottom, for "PL XIV" read "PL XIII." 

 Page 426 — 16th line from top, semi-colon after "position." 

 Page 426 — 6th line from bottom, for "border" read "borders/"' 

 Page 427 — 2d line from top, for "faces" read "face." 

 Page 428 — 13th line frcm bottom, for "LeGrande" read "LaG-range." 

 Page 430 — 11th line from top, for "fragments" read "fragment." 

 Page 432 — 1st line from top, for ll a7igulari$ ,i read "angulalus." 

 Page 435 — Sth line from bottom, for "narrower ' read "narrow." 

 Page 444 — 12th and 11th lines from bottom, for ''Astracanthus" read ''Asteracantkus" and 



" Aster •acanthi."' 

 Page 44S — 6th line from bottom, for "form" read "from," 

 Page 455 — Sth line from bottom, for "external" read "internal." 

 Page 456— 17th line from top, for "forms" read "form." 

 Page 459 — 13th line from bottom, for "differ" read "differs." 

 Page 462 — 13th line from top, for "1 a" read "4 a." 

 Page 464— 15th line from bottom, for "truncated" read "interrupted." 

 Page 465— 3d line from top, for "bifurcates" read "bifurcate." 

 Page 465— 6th line from bottom, for "face" read "faces." 

 Page 468— 2d line from bottom, for "tnnrvis" read "trouves " 

 Page 471— 18tb line from top, for "PI. XXH" read "PL XXI." 

 Page 473 — 18th line from top, for "small" read "smooth." 

 Page 474 — 7th line from top, for "beneath" read "between." 

 Page 479 — 4th line from top, for "transvere" read "transverse." 

 Page 479 — 1th line from bottom, for "thin" read "three." 

 Page 484 — 9th line from top, for "plicatilus" Tead "plicatilix ." 

 Page 495— 12th line from top, fur "tho" read "the." 



