550 DISCOVERY REPORTS 



four sharp, forwardly-directed teeth mentioned in the earlier descriptions. These are 

 not, however, arranged in two widely separated pairs, as in Molin's figures, nor is there 

 a blunt, median projection between the two pairs of teeth, as indicated by Orley. 



The tail is rapidly tapering and conical, with a minute terminal button. It is about 

 0'3 mm. long, and has a pair of small, sessile papillae at about its middle. The anus is 

 conspicuous, but its lips are not very prominent. The vulva is situated at about lo mm. 

 from the anterior end. The vagina is stout and muscular, and runs posteriorly from the 

 vulva. There are two uterine branches, which run parallel in a posterior direction. One 

 of the ovarian tubes ends posteriorly, the other turning forward to end in the anterior 

 region. No eggs are present in this specimen. 



Family HETERAKIDAE Sub-family Heterakinae 



Heterakis dispar (Schrank, 1790) 



A few specimens of this species were collected from the rectum of an upland goose 

 {Chloephaga magellanica) at Teal Inlet, Falklands, March 5, 1927. 



Order STRONGYLOIDEA 



Family TRICHOSTRONGYLIDAE Sub-family Trichostrongylinae 



Nematodirus spathiger (Railliet, 1896) 



Numerous specimens of this species occurred in the small intestine of a sheep at 

 Port Stanley, Falklands, March 9, 1927. 



Order FILARIOIDEA 



Family PHILOMETRIDAE 



Philometra globiceps (Rud., 1819) 



A single female worm, about 170 mm. long, found in the gonad of a Percoid fish at 

 Station 274, off St Paul de Loanda, Angola, W. Africa, August 4, 1927, is doubtfully 

 referred to this species. The characteristic swelling of the anterior end of the oesophagus 

 is present, though not very pronounced. The oesophagus is almost exactly i mm. long. 

 The colour of the worm, when fresh, was "red, with black centre". 



Family SPIRURIDAE Sub-family ACUARIINAE (?) 



Crassicauda crassicauda (Creplin, 1829) 



A number of specimens of this species were collected from the penis of fin whale 

 No. 796 (Balaefioptera physaliis) at Saldanha Bay, South Africa, June 26, 1926. 



