ERRATA AND ADDENDA. 



Page 7, Bibliography , for '1738' read '' I737-I73 8 -' 



Page 17, line 8, for 'hypoblast behind' read 'hypoblast behind the blasto- 



pore.' 



Page 1 8, line 2 from bottom and footnote, for ' Faivre' read ' Fabre.' 



Page 30, line 12 from bottom, for ' Hypoboscida? ' read' Hippoboscid;e.' 



Page ^3, last line, for 'xvi.' read ' xiv.' 



Page 35, paragraph 3. Newport's Segment. The further discussion of 

 Newport's segment has been omitted ; the questions involved have, however, 

 been discussed in relation to the genital segments. I regard Newport's 

 segment as of post-embryonic origin, and, like the cephalic post-oral somites, 

 as unrepresented in the embryo. On the post-embryonic somites, consult 



p. 729. 



Page 38, line 6, ' (see Sensory organs)' the portion of the work referred 

 to will be found on p. 71. 



Page 65, in footnote, for ' K. I.. C.' read ' C. L. C.' 

 Page 77, in footnote, for ' Chironomus ' read ' Corethra.' 

 Pa-e 210, line i, 'seventh segment of the male,' see note to p. 744. 

 Page 262, Bibliography, '127' is printed a second time in error before 

 ' Viallanes,' and should be omitted. 



Page 292, Bibliography, 'See also Zool. Anzeig., Bd. viii.,' etc., should be 

 included in 145, and 146 should he : '146. KOWALEVSKI, A., " Zurn Yer- 

 halten des Riickengefasses, und des guirlandenformigen Zellenstriinges der 

 Musciden wiihrend der Metamorphose." Biol. Centralblatt, Bd. vi., p. 74, 



1886.' 



Page 332, line 14 from bottom,/^ ' PI. VIII.' read'PL XVIII.' 

 Page 466. The pyramidal ganglia are perhaps the representatives of the 



ganglia of the habenulae ; the connections with the ocelli and the posterior 



commissure and crura are very suggestive of this view. 

 I ' '.ge 478, for ' Y ung ' read ' Yung.' 



