96 SPOLIA ZBYLANICA. 



proportion of 70 : 23 ; the eggs are small, thick-shelled, and 

 cylindrical, measuring in length and breadth 0*039 and U-Oll mm. 

 respectively. 



10. — Spiroptera triangulum, n.sp. 

 PL I., fig. 8. 



From body cavity of Oalotes ophioinachus (" katussa," Sinh.), 

 Colombo. 



One male specimen, 4'1 mm. long, 0*51 mm. broad ; cuticula 

 annulate ; at the junction of cjesophagus and intestine there is a 

 deep circular constriction of the body wall. 



The head is rounded, and presents on each side a triangular mark 

 with a small papilla at the apex ; the mouth leads into a small 

 vestibule ; the spicula (cirri) are sub-equal and measure 0*41 mm.; 

 they are attenuated and j)ointed at the end, and show externally a 

 reticulate design ; the oesophagus is equal to 7-7, the tail to j-53 of 

 the entire length ; the tail is flattened dorsally ; on each side of 

 it are four prge-anal and two post-anal papillae ; the former 

 increase in size from before backwards, and the first post-anal 

 papillae are finger-shaped. 



11. — Spiroptera obtusa, Rud. 



From stomach of Mus decunianus, Pallas, Colombo. 

 See Von Linstow, Arch. f. microsc. Anat., Bd. 56 ; Bonn, 1900, 

 pp. 363-366, tab. XV., figs. 3-4. 



12. — Spiruptera, spec? 



From peritoneam of Bafo inelanostictas, Schneider, Colombo. 



A larva of 35 mm. by 1'18 mm.; head not distinct ; reproduc- 

 tive organs not developed. 



Stossich* describes under the name Spiroptera bufonis a larva 

 from the peritoneam of the common toad {Bufo vulgaris), with a 

 length of 44 mm. and breadth of 1 mm., which closely resembles 

 the present example. 



Hetbrakis. 



Mouth generally surrounded by three lips ; the musculature 

 is of the type of Schneider's Polymyaria ; the genus belongs 

 to the Secernentes ; caudal extremity of the male provided 

 with a bursa, and in front of the cloacal aperture with a circular 

 sucker, into which radial muscles are inserted ; two unequal 

 spicnla. 



* Boll. soc. Adriat.. vol. XX.. Trieste, 1900, p. .">, lab. II.. figs. U 18. 



