152 G- A- ^^^ W. G. MacCallum, 



It is lodged in cysts embedded deep in the muscles and not, as 

 in most other cases in relation with the gills. It is definitely 

 hermaphrodite both male and female organs being well developed. 

 Whether two worms or only one live in each cyst we cannot state 

 with absolute certainty since all were turned out of the cysts by 

 the fisherman who could give no precise information about it. From 

 measuremeuts it would seera, however, that two of the worms might 

 have been accomodated in each cyst. 



The neck is remarkably short and practically no trace of 

 suckers nor of digestive tract remains. The peculiar invasion of all 

 the interlobular crevices by a vascular film from the host is similar 

 to that Seen in the form of Nematobothrium to be described and in 

 another form of KoeUikeria. It probably occurs generally although 

 it is rarely mentioned. Similarly the reniform or bean shaped body 

 so commonly found might prove to show lobulations such as are 

 Seen here, if carefully studied. From the arrangement of the uterus, 

 ovary, vitellarium etc. it seems probable that this curious form is 

 in this case at least not due to the mere swelling of the posterior 

 end of the body but rather to the complicated coiling into a compact 

 mass of what was originally a greatly elongated body with secon- 

 dary fusions such as to consolidate the whole into a compact mass 

 and even weld together the outlying parts into a smooth surface, 

 The form next to be described from Haemulon presents a similar 

 process in a simpler stage. 



How the eggs escape from these cysts to the outer world is a 

 Problem which we cannot solve with the facts at our disposal. From 

 somewhere near the branchial cavity a cord-like band was traced 

 through the muscles to each cyst and this cord was found on section 

 to contain a large artery and several veins which supply blood to 

 the film described as penetrating the crevices of the worm. The 

 Suggestion has beeu made that some Channel might exist along this 

 cord through which the neck of the worm could extend to discharge 

 eggs or through which the eggs themselves might pass into the 

 branchial cavity, but no such canal was demonstrated. One specimen 

 was found dried up into a mummified mass in which eggs were 

 recognisable and this has also been observed in another form. It 

 seems possible, therefore, that sometimes the eggs may never escape 

 unless the host dies and disintegrates, when they may pass into 

 some intermediate host. 



D i a g n s i s : KoeUikeria xiphiados. Large worms found encysted 



