ANISAKINAE 7 



Hab. Intestine of a semi-aquatic Mammal (one species 

 known). 



Genotype : O. [AncyracantMis] cucullus (v. Linstow, 1899). 



V. Linstow, 1899, 3Iitt. Zool. Mus., Berlin, i, 19 ; Railliet, 

 1916, Journ. Parasitol., ii, 103. 



Ancyracanthus cucullus v. Linstow, 1899, for which Railliet 

 proposed the genus Galeiceps, referred by him to the family 

 Thelaziidae, appears to be very closely related to Cloeoascaris. 

 The two dorsal buccal swellings described by v. Linstow 

 appear to be two lobes of a single dorsal lip. No mention is 

 made of spines between the bases of the lips and the cuticular 

 collar. Possibly the re-examination of v. Linstow's species 

 may show that Cloeoascaris is synonymous with Galeiceps. 



7. Paranisakis Bay lis, 1923. 



Lips with dentigerous ridges. Interlabia present. Oesoph- 

 agus with a ventriculus, but no oesophageal or intestinal caeca. 



Hab. Intestine of Fishes. 



Genotype : P. squatinae Baylis, 1923. 



Baylis, 1923, Parasitol., xv, 8. 



The genus Paranisakis resembles Anisakis in having an 

 oesophageal ventriculus, but no caeca. It differs, however, 

 in the presence of interlabia and dentigerous ridges. The 

 characters of the head indicate its very close relationship 

 to Contracaecum. 



8. Dujardinia Gedoelst, 1916. 



Ifips without dentigerous ridges, but with the cuticle of their 

 internal surfaces produced into large tooth-like structures, 

 apparently capable of being interlocked. These structures are 

 carried by three main cuticular lobes on the anterior border 

 of each lip. Interlabia present. Well-marked interlabial 

 grooves run from them to the bases of the lips. Oesophagus 

 with a small spherical bulb. No oesophageal caecum. An 

 intestinal caecum present. Vagina long and slender. Eggs 

 subglobular, with very thin membranous sheU. 



Hab. Alimentary canal of aquatic Vertebrates (Crocodiles, 

 Fishes, Dugong). 



Genotype : D. \Ascaris'\ helicina (Molin, 1860). 



Molin, 1860, Sitz. k. Akad. Wiss., Wien, xl, 337 ; v. Drasche, 

 1883, Verh. k. k. Zool.-bot. Ges., Wien, xxxii, 130 ; Gedoelst, 

 1916, Rev. Zool. Afric, Brussels, v (1), 18, 21 ; Baylis, 1920, 

 Parasitol., xv, 223. 



9. Multicaecum Baylis, 1923. 



Lips with dentigerous ridges. Small interlabia present. 

 Well-marked interlabial grooves run from them to the bases 



