552 A DESCRIPTION OF THE ENTOZOA COLLECTED BY DR WILLEY 



One of my specimens head the lappets folded one on another so that the head 

 appeared spherical and resembled the Fh. lactuca of van Beneden, the other fortunately 

 had its lappets spread oiit as shown in the figure. 



Zschokke' has given an excellent account of the anatomy of a proglottis of this 

 genus and I have little to add to what he has written. I did not observe any 

 transverse vessels uniting the longitudinal canals of the water-vascular system, but 

 the latter give off numerous fine branches. The uterus as it first appears is a rod- 

 like body, its walls then increase laterally b)' numerous pockets. These pockets are 

 separated from one another by dissepiments which end in a trifid or quadrifid edge. 



In the oldest proglottides which were at my disposal the uterus has ruptured 

 about the centre of the dorsal surfice and I am inclined to think that this normally 

 takes place, for even in the segments in which the uterus is not full of ova there 

 is a marked thinning of the wall of the uterus and body at this spot. 



The following are the characters of the species : — 

 Phyllobothrium dipsadomorphi, n. sp. 



Head with four flattened heart-shaped lappets, which bear no sucker (?). A well- 

 marked raised rim which gives off a few radial ridges surrounds the lappets. These 

 pass a little way towards the apex of the lappet. Breadth of body very uniform. 

 Genital pores unilateral and irregular, two or three to the left and then two or three 

 to the right. 



Habitat. Intestine of Dipsadomorphus irregularis, Blanche Bay, New Britain. 



VI. COELODELA KUVARIA, n. gen. et sp. 



The following is an account of a Tape-worm taken from the intestine of a fi-uit- 

 eating Pigeon, Carpophaga van-ivycki, shot near Karavia in the Gazelle Peninsula, 

 New Britain. It will be seen from the sequel that I have been obliged to pro- 

 visionally propose a new genus for this species. It is always a somewhat risky thing 

 to establish a genus on a single specimen, and it is especially so when that genus 

 has to be characterised by structural peculiarities, the very discovery of which has 

 entailed the destruction of the specimen as a whole. The differences between this 

 specimen and others with double sexual organs and pores will, I think, justify the 

 establishment of a new genus for which I suggest the name of Goelodela. The generic 

 name has reference to the extraordinary development of the spaces of the water- 

 vascular system. The specific name Kuvaria is derived from the native word Kuvar, 

 which denotes a pigeon. From the fact that this animal inhabits the pigeon, a bird 

 extremely liable to be shot, it is to be hoped that it will not be long before moi-e 

 examples of this parasite are available for research. 



The length of the worm is some .50 mm., its greatest breadth .5 mm., the breadth 

 of its head 1 mm. The ventral surface of the proglottides is slightly hollowed and 



' Mem. Inst. Geiiev. xvii. 1886—1889, p. 317. 



