Jl "TKliltA NOVA" EXPEDITION. 



In the female tlic genitalia .-ire verv simple. The genilal aperture lies ',) 8 mm. 

 behind tin- head. There is ,-i triangular cavity representing the vagina ; the apex of 

 this is the vulva, and from each luisal angle there proceeds along the body a, straight 

 genital tube. The one which proceeds cephalad terminates in a bluntly rounded end 

 at 3'5 mm. from the oesophageal valves, while the caudad tube ends similarly. 



[Mention must be made of the pair of beautiful ocelli (PI. I, tig. 3, <') which 

 are present on either side of the oesophagus at 0'4(imni. from the head. Each 

 is composed of a number of globules of a deep crimson colour. 



PARASITIC NEIil ATXU >ES. 



FAM. ASCARIDAE. 

 Kttf/i/i'ciitt* Leip. and Atk. 



KiitMeena, Leiper and Atkinson, Proc. Zool. Sor., 1914, p. 226. Genotype, Am-m-ix nucnlntn. Kurl. 



An Ascarid with three large fleshy lips .and three interlahia. The oesophagus lias a solid appendage 

 and the intestine has an anterior eaecal prolongation. 



In this genus may be placed K. scotti, Ascaris railintn. and .1. i-fi-tiiiii/iiiii. 



2. Katlili'i'iia xcotti, Leip. and Atk. (PI. I, figs. -2, 5, 8. Text-fig. 1.) 

 Katli/i'i'na x/'iilli, Leiper and Atkinson, Pr/n: Z<ml. SHI:, 1914, p. l'L';>. 



Whitish firm round worms. Male 15xO"9 mm. Female the same size or slightly larger. Interlahia 

 very large, pentagonal. Short curved oesophageal appendage 0'2 mm. Intestinal caecum 1 -8 mm. 

 Oesophagus 2/53 X 0'4 mm. Spicules 3 X 2-7 mm. The tail of the male terminates in a blunt digitate 

 process. 



Host. Several whitish round worms varying from half to three-quarters of an inch 

 in length were obtained from the intestine of a single specimen of the Mollymauk 

 (Diomedea melanophrys) killed off the Campbell Islands, Lat. 5'2 20' S., Long. 

 167 30' E. (Stat. 1(35). 



These worms are typical Ascaridea and show several features in common with 

 Asc<(rif< oxritlata Rud., J. n/iliiitu v. Linst., and J. rectangula v. Liust. of Weddell's 

 Seal. They are accordingly grouped with them in a separate genus, of which A. oscitlntii 

 Rud. has been designated the type. 



Ptirnxitt'. A mature and fairly typical male measures 15 '3 mm. in length, bv 

 0'9 mm. in greatest breadth. The posterior extremity curves vent-rally and tapers to 

 end in a finger-like process. The anterior end is bluntly truncated owing to the 

 presence of three particularly stout interlabia (PI. I, fig. 8. A) in addition to the usual 

 three large fleshy lips (n, n', "} found in all Ascaridae. The female is straight and 

 its posterior end is also digitate. The skin is transversely striated. The iiiterlabia 

 are very large and of pentagonal outline, measuring from base to apex 0'08 mm., and 



* The diagnoses of the new forms collected by the Expedition have been reprinted from the 

 Proceedings of the Zoological Society, with a few merely verbal alterations, by kind permission of tlio 

 Committee of Publications of the Society. 



