viii TEMPORARY PREFACE. 



Carnegie Trust has granted a sum of £100 for 1907-8, and this, together with a balance, 

 will be utilized for the heavy expenses of the coloured plates. By this liberality the 

 Ray Society will be the more able to take in hand the next part (similar in size and in 

 the number of plates), which lies ready for printer and lithographer. 



To Mr. Kappel, Librarian of the Linnean Society, and Mr. White, Librarian of the 

 Royal Society, my best thanks are due for their valued aid with books. 



Lastly, I have to thank Mr. Hopkinson, the Secretary of the Ray Society, for the 

 great pains he has taken in the arrangement of the figures in the coloured plates, the 

 verification of certain references, for general interest and advice in the course of the 

 work, and especially for his careful revision of the proofs. 



W. C. M. 



Gatty Marine Laboratory, 

 St. Andrews; 

 October 10th, 1907. 



