PLAXIPHORA. 333 



Acanthoehites ovatus BUTTON, Man. N. Z. Moll., p. 177 (1880.) 



This species differs from P. egregia in contour, the fourth valve_ 

 being the widest, the sixth much narrower, whilst in the other 

 species the fifth and sixth valves are as wide as the fourth ; more- 

 over the side teeth of ovata do not seem to be thickened at the edges 

 of the slits as they are in egregia. The specimen described and 

 figured was sent by Professor Hutton. 



ERRATA. 



Page 75, dele the word ISCHNOCHITON, in 8th line. 



Page 97, I. CURTISIANUS is not an Ischnochtton but a Liolophura, 



see p. 242. 



Page 110, For " L regulatus" read "I. rugulatus." 

 Page 133, " I. PUSIO" is probably not an Ischnochiton, but a true 



Chiton, and it is likely to prove identical with Chiton 



murrayi Haddon, described on p. 161. 



Page 151, line 11, for " indentification " read "identification." 

 Page 182, last line, remove " C. scytoderma " from the synonymy 



of C. rubicundus. 

 Page 191. The authority for C. SULCATUS shouldbe " Wood," not 



" Sowerby." 



Page 204, line 14, for "indentification" read "identification." 

 Page 206, fifth line from bottom ; the reference to Savigny should 



read " t. 3, f. 6, 1-2," instead of " f. 4." 

 Page 329. " Chiton (Acanthopleura) piceolus" Shuttlew., included 



under Acanthopleura granulata as a doubtful synonym, 



is probably referable to the genus NUTTALLINA, s. g. 



Middendorffia, and it should be compared with N. 



einerea Poli, p. 283. 



NOTE. 



The Index to Chitons will accompany the conclusion of the mono- 

 graph, to be contained in the next part of the MANUAL. 



