N. B.—The additional Plates which should have appeared 
in the present Fasciculus will be given in another Num- 
ber, shortly to be issued. Great disappointment has been 
occasioned to the Editing Committee by the long-continued 
delay in the execution of these Plates by the Heliotype 
Printing Company of Boston. 
The Illustration to Prof. Wright’s paper on Demodex 
will also be supplied hereafter, in cases where it may not 
be included in the present Number. 
