HBLMINTHES : COLOMBO MUSEUM. 169 



16. — Oxyuris viegaloon, n.sp. 



Intestine of Gecko, Hemidactylus leschenaultii, Dum. et Bibr, 

 Mamadu. 



Females only in the collection, 6*52 x 0*91 ; cuticle deeply 

 annulate ; head with three small lips ; oesophagus -^-ir, narrow, 

 ending behind in a spheroidal bulb ; tail conically pointed, -^^ ; 

 eggs very large, 0*083 x 0*047. 



Oxysuma. 



Head with three or more lips ; oesophagus with a spheroidal bulb 

 behind ; male with two equal cirri and three paired pree-anal 

 papillae ; number of post-anal papilla variable; tail in both sexes 

 finely pointed; Secernentes-Meromyaria ; in reptiles and amphibia. 



17. — Oxysoma falcatum , n.sp. 

 PI, III., figs. 50-51. 



Intestine of the Tortoise, Nicoria trijuga, Schweigg. ; Colombo. 



Cuticle smooth ; head broadly rounded with six stalked 

 papillae ; the stalks are divided giving off an inner branch ; 

 behind the head are four large papillae in the submedian lines ; 

 oesophagus thin, in the male e^, female ~q^ ; the bulb is 

 embraced by the cup-shaped commencement of the intestine ; 

 excretory pore behind the middle of the oesophagus dividing the 

 latter in the ratio 21 : 16. 



Male, 11"6 x 0*55 ; tail ^\y, bent hook-like towards the ventral 

 surface ; cirri equal, falciform, very broad before the middle, 0*44, 

 pointed at the end; three prae-anal and five post-anal papillae 

 (paired). 



Female, 14*1 x 0*56 ; tail y^ ; genital orifice behind the 

 middle dividing the body as 5 : 3 ; the vagina runs forwards ; 

 eggs 0-14 x 0-097. 



'oo^ 



Dispharagus. 



Head with two lips ; in the region of the so-called neck the 

 cuticle shows four longitudinal pleats ; male with two unequal 

 cirri ; on each side of the tail four prae-anal papillae ; it belongs 

 to the Secernentes-Polymyaria ; occurring in the CBSophagus, 

 stomach, and gastric submucosa of birds. 



IS. —Dispharagus macrolainms, n.sp. 



Stomach of the Ddirtev, Plotus melanog aster, L. ; Wirawila. 



Females only in the collection, 7*3-ll*4 x 0'28-0'47 ; cuticle 

 annulate, with elevated lateral lines ; head with two small, 

 conical, rounded lips ; the mouth leads into a long vestibule ; 



