544 DISCOVERY REPORTS 



Anisakis catodontis, sp. n. 



(Fig. i) 



Among specimens of A. physeteris in the stomach of a sperm whale (No. 932) at 

 Saldanha Bay, South Africa (August 10, 1926), there were a single mature male and 

 several immature forms of a different species. 



The male is about 80 mm. in length and i -3 mm. in thickness. The cuticular striations 

 are coarse in the oesophageal region, where the interval between them is about 0-05 mm. 

 In the middle region of the body, however, they 

 are much finer, the interval being about 00075 

 mm. Each lip has a broad base and a narrow 

 anterior lobe, deeply indented in the middle and 

 provided with a prominent dentigerous ridge 

 composed of coarse and irregular teeth. The 

 oesophagus (measured from the extremity of the 



lips and excluding the ventriculus) is 45 mm. ^__ 



long. Its greatest thickness (near the posterior 01 MM. 



end) is 0-39 mm. The ventriculus is straight. Fig. i. Anisakis catodontis. Dorsal lip of 



and measures about 17 mm. in length and male, external aspect. 



0-4 mm. in greatest width (at its posterior end). The nerve-ring is situated at 0-6 mm., 



and the cervical papillae at 0-75 mm., from the anterior end. 



The tail is bluntly conical and measures 0-25 mm. in length. It has only been possible 

 to examine it in lateral view, and only a single pair of postanal papillae was observed; 

 This was situated near the posterior end. There are numerous preanal papillae, arranged 

 irregularly and extending forward for a considerable distance. The spicules are tubular 

 and without alae. The left spicule measures 2-25 mm., the right 1-45 mm. in length. 

 Their dorso-ventral diameter is about 0-03 mm. 



The immature specimens measure up to about 47 mm. in length and 0-9 mm. in 

 maximum thickness, and show the same oesophageal structure as the adult male. 



Anisakis sp. 



Several immature specimens of a species of Anisakis occurred in [the stomach of ?] 

 a humpback (Megaptera fiodosa) at Durban, July 29, 1926. 



Porrocaecum falklandicum, sp. n. 

 (Fig. 2) 

 A pair of specimens, male and female, collected from a dotterel {Eiidromias (Zonibyx) 

 modestiis) at Port Stanley, Falklands, March 28, 1927. This species is very closely related 

 to P. ensicaudatum (Zeder, 1800) and P. semiteres (Zeder, 1800) from European birds. 

 The male is 13-7 mm. long and 0-7 mm. thick, the female 23-5 mm. and 1-2 mm. 

 respectively. The cuticular striations (in the female) are at intervals of about 0-017 mm. 



