some Parasitic Xematocles. 



r>03 



eqiLnl or exceed the vciitilculiis in leiigtli, as it does in 

 P. semiteres (H<^. 5, r.). 



As regards the iiomeiiclatiue of these two species, that for 

 which tlie name ensicaudatum lias been used may or may not 

 be identical with that named Ascaris sturni by Gmelin, 

 1790. The only indication of Gmclin's species is the mention 

 of the host, but he regarded the form from the starling and 



F\s. 7. 



Porrocaicum semitercs. Tail of lunle; ventral view, showing 

 po tanal papillae. 



that from thruslies as distinct, giving them tlie names sturni 

 ajid turdi respectively. If it could be definitely shown that 

 the species ensicandata and sturni are identical, then sturni 

 would apparently have to be taken as the name of the 

 species'^. In view of the unsatisfactory definition of 



* Ascaris teres, Goeze, 1782, is a collectivo species, aud therefore 

 inadmissible. 



