556 A DESCRIPTION OF THE ENTOZOA COLLECTED BY DR WILLEY 



the body of the egg and is in the preserved specimens in all cases crumpled and 

 distorted. 



The above-mentioned facts show that the tape-worm in question differs markedly 

 from the other genera with double genital orifices, which are found in birds. To 

 bring this out more clearly I have prepared the following abstract of the more 

 important anatomical features in which Cotugnia, Amabilia and Diploposthe differ from 

 the one in question. 



Cotugnia. Rostrum rudimentary with a great number of very minute hooks. 

 Suckers large. Uterus full of a parenchymatous mass in which the eggs are found 

 in the mature proglottides. Water-vascular system not particularly large. Habitat, 

 intestine of certain Birds. 



Amabilia. The most important feature of this genus is that the cirrhus is double 

 but the female generative organs are single and in the median line. The male organs 

 are lateral and those of one side are distinct from those of the other (Cohn). The 

 vagina is median. Habitat, intestine of Phaenicopterus roseus (antiquorum). 



Diploposthe. The ovary is paired but lies in the middle line, a vagina passes 

 off from each and opens laterally close to the cirrhus. The testes are aggregated near 

 the centre of each segment. The lumen of the uterus in the ripe proglottis is spacious 

 and not at all occluded by parenchyma. Habitat, small intestine of Fuligida ferina 

 and other ducks. 



I should put together the following as the features upon which, provisionally, 

 this genus is founded : — 



Coelodela Kuvaria n. gen. et sp. 



Rostrum rudimentary bearing no hooks. The male and female organs are double 

 vnth the single exception of the uterus. The vas deferens and the vagina open on 

 each side of each proglottis. In mature specimens the uterus is spacious -with practically 

 smooth walls and the lumen is not divided up by dissepiments. The water-vascular 

 spaces attain very large dimensions and this is especiall)' true of the transverse 

 canals. The dorsal vessel does not reach beyond in the neck. 



The species has the characters of the genus. 



Habitat. The intestine of a fruit-eating Pigeon. Carpophaga van wycki shot at 

 Karavia, Gazelle Peninsula, New Guinea. 



It is worthy of notice that the only other tape-worm recorded from this genus 

 of fruit eating Pigeons is the Taenia insignis of F. Steudener', who found the parasite 

 in the alimentary canal of Carpophaga oceanica Lesson, a bird which is recorded in 

 the British Museum Catalogue under the name Globicera pacifica. The anatomy of 

 Steudener's T. insignis shows little or no resemblance to that of the form described 

 above. 



' Abh. Ges. Halle, xiii. 1877, p. 277. 



