vni. 



In addition to these, other Memoirs will be aiiaiig'ed 

 for, on suitable types, such as Sagitta (by Mr. Cole), a 

 Cestode and a Turbellarian (by Mr. Shipley), Careinus. 

 an Amphipod, and a Pycnogonid (probably by Dr. A. H. 

 Jackson). 



As announced in the preface to Ascidia, a donation 

 from Mr. F. H. Grossage of Woolton met the expense 

 of preparing the plates in illustration of llie first feAv 

 Memoirs, and so enabled the Committee to commence 

 the publication of the series sooner than would otherwise 

 have been possible. A second donation received since 

 from Mr. Gossage, and another recently from Mrs. Holt, 

 are regarded by the Committee as a welcome encourage- 

 ment, and will be a great help in carrying on the work. 



W. A. Herumax. 



University College, Liverpool, 

 March, 1901. 



Note. — The present Jlemoir by Mr. Andrew Scott differs from those 

 published and contemplated inasmuch as it deals with two 

 generic types. At one time I thought of issuing Lepeophtheirus 

 and Leen.e A as separate Memoirs ; but, on consideration, it seemed 

 clear that these two diverse types of Epizoa supplemented one 

 another and illustrated well the range in form of the parasitic 

 Copepoda, and that consequently it would be convenient to the 

 student to have them under one cover. — W.A.H. 



