ERRATA AND ADDENDA. 



Page 28, line IS, add (See pp. 362, 378, 414, 415.). 



Page 28, line 31, /or Muerchen (1774) read Meuschen (1787). 



Page 54, line 28, for Oligoporus danac Meek and Worthen read Oligoporus danar (Meek and Worthen). 



Page 105, line 8, /or M agnosia punchdata (Lamarek) read Magnosia punclata (Quenstedt). 



Page 148, line 34, /or Holectypus hemisjihcricus read Hohrfi/pus hcmisphacricm. 



Page ISS, line 5, /or distinct continuous base read discontinuous base. 



Page 208, line 4, for and alone on other read and usually alone on other. 



Page 208, line 6, for Eleven read Twelve. 



Page 230, line 33, /or Oligoporus danac Meek and Worthen read Oligoporus danae (Meek and Worthen). 



Page 232, line 16, for twelve read thirteen. 



Page 233, line 27, for eleven read twelve. 



Page 250, after line 26, add a line reading: Echinoci/stites (pars) Duncan, 1889a, p. 20. 



Page 251, line 28, for sea-urchin, superposed on those of a starfish read starfish, superposed on those of a 



sea-urchin. 

 Page 252, line 19, for Duncan, 18S9a, p. 20, read (pars) Duncan, 1889a, p. 20. 

 Page 253, line 21, for Tesselaii read Tessellati. 

 Page 272, line 3, /or 1880, p. 130, read ISSOa, p. 130. 

 Page 272, line 18, /or Plate 2, fig. u read Plate 2, fig. n. 

 Page 272, line 19, /or Plate 25, figs. 1, la, read Plate 35, figs. 1, la. 

 Page 282, line 7, for Plate 23, fig. 16 read Plate 33, fig. 16. 

 Page 282, line 13, for Lepidocidaris Meek and Worthen, 1873, p. 482; read Lepidocidaris Meek and W'orthen, 



1869, p. 81; 1873, p. 482. 

 Page 287, line 30, for Eight columns read Apparently nine columns. 

 Page 321, line 26, /or Lambert and Thiery, 1900, rend Lamlicrt and Thiery, 1910. 

 Page 356, line 7, for Oligoporus danae read *01igoporus danae. 

 Page 428, line 9, for Plate 78, read Plate 71. 



Description of Plate 7, fig. 2, line 6, /or (K-ulars I and II read oculars I and III. 

 Description of Plate 67, line 1,/or Perischodomus harteiana read Perischocidaris harteiana. 



(491) 



