LONDON: EDWARD ARNOLD, 41 & 43 MADDOX ST., W.
Transcriber's Notes:
Figures repeated from Volume I have been included in the Table of Illustrations.
On page 246 (Fig. 125, B and C) has been corrected to Fig. 124, B and C).
On page 216 Fig. 118, D, has been corrected to Fig. 122,D.
In the index, Reproductive cells, development of, in Diptera, has been corrected from 471 to 411.
In the index, Spontaneous generation, ii. has been corrected to Spontaneous generation, and thus refers to volume I.
Illustrations have been moved out of mid-paragraph.
Variations in spelling and hyphenation are retained.
Punctuation has been retained as published.