48 W. N. F. WOODLAND 



Part I. 



The Structure and Bionomics of Amphilina 



P ARAGONOPOR A, Sp. 11. 



The new species of Amphilina which forms the subject- 

 matter of this paper constitutes the fifth ^ known to exist 

 and the third to be described in detail. I have supplied 

 a detailed description of the anatomy of this new species 

 because it appears to me that the descriptions of Amphilina 

 supplied by previous authors leave much to be desired in certain 

 respects, because the present species differs in several particulars 

 from A. foliacea and A. liguloidea, and because it 

 is necessary to elucidate the exact nature and mode of function 

 of the proboscis apparatus — the proboscis, the enormous 

 attached proboscis muscle (or bundle of gland-ducts according 

 to one interpretation), and the conspicuous giant cells which 

 Salensky termed ' problematische Zellen ' — an apparatus which 

 has been much misdescribed and misunderstood. I am also 

 able to describe an important phase in the life-history of this 

 form, which has not been mentioned in connexion with any 

 other species of Amphilina or, indeed, Cestodaria, so far as 

 I am aware. 



I may add that A . p a r a g o n o p o r a is the second species of 

 Amphilina discovered in or near India. The first (A. magna) 

 was found by Southwell (8) in the coelom of a marine fish 

 (Di a gramma crassispinum) from the coast of Ceylon, 

 and in general shape and structure is apparently similar to 

 A . p a r a g o n o p o r a , and it is to be regretted that Southwell's 

 sole description of its genitalia is so vague. A. paragono- 



^ The other four are A. foliacea, Rudolphi, 1819 (vide Salensky, 

 7; Cohu, 1; Hein, 2; Pintner, 6; Wagener, 9) and A. neritina, 

 Salensky, 1874 (7), from Europe; A. liguloidea, Diesing, 18.50 (vide 

 Monticelli, 5; Janicki, 3), from Brazil, and A. magna, Southwell, 

 1915 (8), from Ceylon. The anatomy of A. neritina (assuming it to be 

 a distinct species) is apparently very similar on the whole to that of 

 A. foliacea, only differing in small details, and Southwell has only 

 roughly indicated the general disposition of the genitalia in A. magna. 



