"TERRA NOVA" EXPEDITION. 



The Females generally measure 5 em. and are larger than the males, which they 

 resemble in most of the characters. The vagina is 5 mm. from the head end. The 

 anus is 0'3 mm. from the tail. The eggs measure 0"00 mm. x 0'06 mm. 



Terranova, Leip. and Atk. 



Terranova, Leiper and Atkinson, Proc. Zool. Soc, 1914, p. 226. Genotype, Terranova antarctica, 

 Leiper and Atkinson. 



An Ascarid with three large simple lips. No interlabia. Oesophagus simple. Gut with anterior 

 caecal prolongation. No oesophageal appendage. 



G. Terranova antarctica, Leip. and Atk. (PL I, figs. 1, 4, 7.) 



Terranova antarctica, Leiper and Atkinson, Proc. Zool. Soc, 1914, p. 226. 



Female 32 mm. long. Three squat fleshy lips with paired anterior lobes. No labia intermedia. 

 Oesophagus without appendage. The intestine has a long caecum. The anus lies at the base of a deep 

 sulcus. 



Host. — A single female specimen of this Ascarid was found in the stomach of a 

 shark (Mustelus antarcticus) in the region of the Bay of Islands, New Zealand. 



Parasite. — The specimen measures 32 mm. in length, and is coiled in one and a 

 half spirals. The skin is coarse and striated transversely. 



The worm is very thick and opaque, having a diameter of 3 mm. in the middle third 

 of the body, which tapers gradually to end in a rounded head and a somewhat more 

 pointed tail. The anus lies at the base of a deep sulcus which can be seen with the 

 naked eye (PL I, fig. 4, a). Behind this the tail rapidly tapers with a slight ventral 

 inclination. The chyle-intestine is pigmented with dark brown granules. The 

 characteristic features of the worm are as follows : — 



There are three squat, round, fleshy lips, each having a pair of spheroidal lobes 

 projecting forwards (PL I, fig. 7). The lips are not markedly separated from 

 the neck. 



There are no labia intermedia. 



The oesophagus is a cylindrical muscular organ without oesophageal appendage 



(PL I, fig. 1, a). It enters the chyle -intestine laterally. 

 A large caecal prolongation of the gut extends forwards alongside the oesophagus 



to 1 mm. from the head (PL I, fig. 1, /'). 



The absence of intermediate lips and of an oesophageal appendage necessitates a 

 separation of the species from those which constitute the genus Kathleena. 



The great opacity of the worm, even after clearing in creosote, obscures the 

 arrangement of the ovarian and uterine tubules. The vulva is 14 mm. behind the head ; 

 from it the vagina passes almost directly backwards. The uterine tubules are filled 

 with eggs apparently of small size, but these could not be measured in situ. 



