824 WINTERTON C. CURTIS 
of Calliobothrium leucartii and Calliobothrium verticillatum 
there is no trace of such a structure. 
In a later paper on the parasites from the fishes of Beaufort, 
North Carolina, Linton (’04) finds the Scolex polymorphus in 
many of the fish examined and speaks of the larvae as follows 
(p. 326): 
The larval cestodes, doubtless representing several genera, recorded 
in Parasites of the Woods Hole Region under the name of Scolex poly- 
morphus, were found in thirty-four of the fifty-nine Beaufort fishes 
examined. As at Woods Hole these forms are found not only in the 
alimentary canals of their hosts but also in the cystic ducts of several. 
They are almost never absent from the cystic duct of Cynoscion regalis. 
In all cases, where these worms have been obtained from the cystic duct 
and from the intestine of the same fish, those coming from the cystic 
duct are larger, plumper, and more opaque than those from the intes- 
tine. Some of the older larvae suggest the genera Calliobothrium, 
Acanthobothrium and Phoreiobothrium. 
Again, in speaking of the parasites of the sharp-nosed shark, 
Seoliodon terrae-novae, under Phoreiobothrium triloculatum, 
he says (p. 348): 
1 scolex, no segments yet developed; length 2 mm.; hooks small. This 
specimen looks very much like some of the more advanced specimens of 
Scolex polymorphus which have occasionally been found, save that the 
bothria have assumed the characteristics of P. triloculatum. 
On page 359, under the parasites of the pipe fish, Siphostoma 
fuscum, he notes that the specimens of the Scolex polymorphus 
had ‘‘bothria with two costae and rudiment at anterior end, 
suggesting loculi which occur at the anterior end of bothria in 
Echeneibothrium and Acanthobothrium; no red pigment.” 
On page 407 under the parasites of the toad fish, Opsanus tau, 
he speaks of a specimen which was ‘“‘probably a young Callio- 
bothrium,”’ and of another which ‘‘had the characteristic bothria 
of Echeneibothrium and Rhinebothrium. Its prominent muscu- 
lar proboscis, (myzorhynchus), if retained in the adult would 
place it in the former genus.’’ Again, in another lot, “‘ The largest 
had bothria which resembled those of Calliobothrium and Acan- 
