24 Malformations of Ascophyllum and Dcsmarestia. 



my former investigation ; but, unfortunately, he has not been able to 

 decide the name of the species, through want of a sufficient number of 

 complete specimens, most of those I sent to him being immature. I hope, 

 therefore, when I shall have the opportunity of collecting fresh material, 

 to send more specimens to Dr. Brady, that the question as to the species 

 of copepod may be settled. 



Finally, I must express my gratitude to him for the very kind help and 

 encouragement he always gives me. 



ETHEL S. BARTON. 



EXPLANATION OF PLATE VII. 



Ascophyllum nodosum. 



1. Malformation. Natural size. 



2. ,, Trans, sect. ( x 4). 



3. Mature ( x 66). 



4. Young ( x 66). 



Desmarestia aculeata Lam. 



5. Vertical section of malformation (xi43). 



6. small outgrowth ( x 37). 



