EILARIINAE 201 



Cuticle finely striated transversely, in some species bearing 

 small tubercles. No lateral alae. Mouth surrounded by a 

 raised chitinoid ring, notched laterally and usually also 

 dorsally and ventrally, giving the impression of teeth. Four 

 submedian and two lateral papillae present behind the peri- 

 buccal ring. Oesophagus with a short, narrow, anterior 

 portion and a much longer and stouter posterior portion. 

 Tail of male considerably attenuated and spirally twisted. 

 Four pairs of preanal papillae and a median papilla just in 

 front of the cloaca. Three or four pairs of postanal papillae, 

 and usually a pair of small lateral appendages near the tip of the 

 tail. Spicules very unequal and dissimilar; the left long, 

 consisting of a tubular proximal portion and a membranous 

 distal portion, the right short, stout and irregularly shaped. 

 Tail of female conically tapering, curved dorsally, with a pair 

 of lateral appendages near the tip, which is usually knobbed 

 or spiny. Vulva near anterior end of body. Eggs thin- 

 shelled. Ovoviviparous. 



Hab. Peritoneal cavity of Ungulates and ( ?) Marsupials. 

 Genotype : S. [Gordius] equina (Abildgaard, 1789). 



Abildgaard, in Miiller, 1789, Zool. Dan., iii, 49; Viborg, 

 1795, Samml. v. Abhandl. f. Thierdrzte und Oekonomen, 

 Copenhagen, i; Stiles, 1907, U.S. Pub. Health and Mar.-Hosp. 

 Serv., Hijg. Lab. Bull. 34, 40; Boulenger, 1921, ParasitoL, 

 xii, 342; Seurat, 1921, Bull. Soc. Hist. nat. Afrique du Nord, 

 Alger, xii, 35 ; Romanovitch, 1916, Compt. rend. Soc. Biol., 

 Paris, Ixxix, 745 ; Vevers, 1923, Proc. Zool. Soc, London, 913. 



16. Loa Stiles, 1905. 



Cuticle with numerous irregularly-distributed tubercles or 

 " bosses." Mouth at the summit of a truncate conical 

 process, which is narrower than the succeeding portion of the 

 head. Towards the base of this process are two lateral and 

 four submedian sessile papiUae. Oesophagus short. Tail of 

 male short, bluntly rounded, without alae, slightly curved 

 ventrally. Apparently nine pairs and two unpaired caudal 

 papillae present, the latter on the anterior and posterior lips 

 of the cloaca respectively. Of the former four pairs are large 

 lateral papillae with swoUen peduncles, forming a group, 

 three of which are preanal and one postanal. Two short, 

 unequal spicules. Tail of female short and rounded. Vulva 

 towards the anterior end of the body. Common trunk of 

 uterus long. Uterine branches two, parallel, both recurving 

 anteriorly at different levels. Eggs hatch in utero. 



Hab. Connective tissue, serous membranes and ( ?) lym- 

 phatic system of Man and Primates. 



Genotype : L. [Dracunculus] loa (Guyot, 1778). 



