170 SPOLIA ZEYLANTCA. 



oesophagus very long, 2^6 ; tail ^f, terminating in a small finger- 

 shaped point ; the nuchal pleats run 0*80 mm. backwards, rather 

 beyond the first section of the oesophagus ; immediately before 

 their termination there is on each side a cone-shaped nuchal 

 papilla ; eggs very numerous, with a double shell, 0"0H1 x O'Oll. 



Sclerostomum. 



Head with buccal orifice set with one or several rows of teeth ; 

 male with two equal cirri and trilobate costif erous bursa ; female 

 genital orifice posterior ; Secernentes-Meromyaria ; in mammals 

 and birds. 



19. — Sclerostomum equimwi, Miiller. 



Intestine of horse ; Colombo. 



Cf. A. Looss, The Sclerostoniidae, Records Egyptian Government 

 School of Medicine, 1901, pp. 76-77, pi. I., figs. 1-5. 



Ankylostomum.. 



Head with chitinous buccal capsule, bent and open towards the 

 dorsal side ; often with teeth in its fundus ; male with trilobate 

 bursa and two equal cirri; bursal lobes supported by ribs; 

 female genital orifice behind the middle ; Secernentes-Mero- 

 myaria ; in the intestine of mammals. 



20. — AnlnjJostomum. minimum, n.sp. 

 PI. I., figs. 11-12. 



Stomach of Felis rubiginosa, Geoffr.; Kandy. 



Cuticle thick and annulate ; buccal capsule dorsally inclined 

 with four ventral longitudinal "ribs" and a tooth at the bottom. 



Male, 2-38 x 0-21 ; oesophagus ^ ; cirri brown and very short, 

 0-062 ; lateral lobes of bursa rounded, supported by six ribs, of 

 which ihe two anterior lie close together, the third, fourth, and 

 fifth form a group, and the sixth lies isolated. 



Female, 4-46 x 0-20; oesophagus ^g ; tail ^V ? genital organs 

 almost confined to hinder half of body ; genital orifice posterior, 

 dividing the body as 31 : 12 ; eggs not numerous, 0*088 x 0-053 ; 

 one branch of the uterus runs forwards, the other backwards. 



21. — Ankylostomum trigonocephalum, Rud. 



Intestine of dog ; Colombo. 



Cf. A. Railliet Traite de Zoologie Medicale, Paris, 1895, pp. 

 470-473, figs, 327-3:50. 



