674 DAVID HILT TENNENT. 
was not of the number. The same was true of the crus- 
tacea and annelids examined. During the winter of 1902, 
at my request, Mr. Coker kindly procured and examined the 
viscera of birds and terrapins which live in the marshes in 
the vicinity of the oyster-beds, but without result. I also 
examined various water plants in the hope of finding encysted 
forms of Bucephalus. 
In June, 1903, I continued the examination of the viscera 
and gills of fishes. On June 25th I procured two gars 
(Tylosurus marinus), and found in the lower part of the 
intestine of each Gasterostoma in abundance. 
Here, then, was a fish which might furnish a clue to the 
solution of the problem. 
At this time other work made it necessary for me to leave 
Beaufort for a few weeks, so the further study was delayed 
for atime. At Woods Hole, in discussing the matter with 
Dr. Edwin Linton, whose work on fish parasites is so well 
known, he informed me that during the earlier part of the 
previous summer, in his work on the ‘Fish Parasites of 
Beaufort,’ he had found Gasterostomum in abundance in the 
gar (Tylosurus marinus), and also in Menidia menidia 
and Stolephorus Brownil, which I had not yet examined. 
On my return to Beaufort in August I took up the work 
where I had dropped it six weeks previously. On this occa- 
sion I devoted my attention for a time exclusively to the gar, 
making special note of the stomach contents. The food for a 
time consisted chiefly of shrimp, although the almost com- 
pletely digested remains of small fish were sometimes present. 
Shrimp being abundant at the time I obtained a large 
quantity, which Iexamined carefully for parasites. Although 
these were abundant none could be found which bore any re- 
semblance to Bucephalus or to Gasterostomum, most of the 
parasites observed being larval cestodes. 
Finally I succeeded in obtaining gars in which recently 
captured fish were found. These proved almost in every in- 
stance to be Silversides (Menidia menidia). 
My attention was then turned to thisfish. Upon examining 
