EBB AT A. 
Page xxviii, fifth line from the top, for “ Eusiphonia ” read “ Neosiphonia.” 
Page XXX, fourth line from the bottom, for “Agiardiella schulzii” read “ Tethyopsis radiata.” 
Page Ixxiv, in table of phylogeny, after “dichotriasne” insert “of the family Thrombidae.” The 
dichotriaene of the Astrophora is undoubtedly derived from the pro-, plagio-, or orthotriaene 
within the suborder. 
Page xcii, sixteenth line from bottom, insert “Vosmaer” lefore “Heider.” 
Page 38, eighth line from bottom, Craniella schmidtii, in the measurement of the chord of the 
anatriaene, read “O'l mm.” for “O'Ol mm.” 
Page 54, bottom line, Craniella tethyoides, in the measurement of the chord of the anatriaene, read 
“O'll mm.” for “O'Oll mm.” 
Page 55, fifteenth line, Craniella zetlandica, the length of the chord should read “013 mm.” instead 
of “ 0-013 mm.” 
Page 88, second line, read “ Calthropella simplex, page 107,” for “ Calthropella geodides, page 110.” 
Page 140, eighth line, read “orthotriaene ” for “protriaene.” 
Page 147, thirteenth line, Anthastra pyriformis, in the measurements of the cladome of the anatriaene, 
read “sagitta 0'048 mm., chord 0-1114 mm.” 
Page 206, Stellettinopsis annulata, here doubtfully referred to Asteropus, is probably a Sphinctrella. 
Page 277, fourteenth line, /or “so many ” read “ some.” 
Pages 278— 280, where the words “hypomere and spongomere” occur, read “ hypophare and 
spongophare.” 
