NO. 16 manter: distribution of digenetic trematodes 



533 



fish trematodes of Tortugas, Florida, are better known, as are those of 

 Japanese and European waters. However, it is believed that the trema- 

 todes considered in this paper constitute a representative sample of the 

 region explored, and one should expect the similarity to the Atlantic 

 fauna to be maintained by the discovery of additional representatives. 

 ' Actually, more game fishes and relatively fewer shore fishes were exam- 

 ined by the author in the Pacific than at Tortugas, so that more closely 

 comparative studies might even reveal increased similarity in the two 

 regions. 



Another qualification to be noted is that the validity of conclusions 

 from such data presumes the correct identification of both parasite and 

 host. 



In spite of these handicaps, some rather distinct tendencies appear 

 in the tables below, and these tendencies seem to be consistent with other 

 known conditions. The trematodes are grouped according to the distribu- 

 tion indicated for each table. Some comments regarding the data follow 

 each table. Authors of scientific names are included in the earlier paper 

 (Manter, 1940) but omitted in this paper. 



The numbers of fishes examined in the different localities are as 

 follows: from Mexican waters, 147; from the Galapagos Islands, 110; 

 from South American coast, 110; from Panama and Central America, 60. 



TABLE 1 



Digenetic Trematodes Occurring in Both the Tropical Pacific and the Tropi- 

 cal Atlantic; Their Hosts and Distribution 



(Species marked with an asterisk (*) are endemic amphi-American as far as 



known) 



Trematode and 

 Pacific hosts 



Atlantic hosts 



Extra- American 

 distribution 



1. Bucephalus various 

 Caranx species 



Caranx ruber 



C. latus 



C. bartholomaei 



Red Sea 



2. Derogenes various 



Cratinus agassizii 

 Paralabrax humcralis 



Dibranchus atlanticus 

 Helicolenus dactylopteriis 

 Merluccius bilinearis 

 Scorpaena cristulata 

 Urophycis regius 



World-wide, at least 

 in cool waters 



Dinurus barbatus 



Coryphaena hippurus 



Coryphaena hippurus European Atlantic 



4. Dinurus longisinus 

 Coryphaena hippurus 



Coryphaena hippurus Red Sea 



