The first of these species was indicated from two species of 

 Brama (Bramidae) and from Heliastes chromis (L. ) Pomacentridae. 

 Hence, we could not ascertain whence came the indications to the finding 

 of E^ nordmanni on Heliastes which was cited in the work of Price (Price, 

 1938a). In not a single one of the old resumes (Linstow, 1878, 1889; St. 

 Remy, 1891-1892, 1898; Monticelli, 1907) is there mention of these data, 

 and in the work of Price himself they are cited without any reference to 

 the source. Thus, these data seem doubtful to us and is more likely that 

 E. nordmanni inust be considered as occurring only on Bramidae and that 

 the indication to Heliastes is erroneous. 



The second species - -Trochopus tubiporus --is known from two 

 species of Trigla (Triglidae) and indicated from Cantharus lineatus (Mont. ) 

 (Sparidae). The last host arouses certain doubts inasmuch as it is not 

 even mentioned by Palombi in his resum^of Italian Monogenoidea (Palombi, 

 1949); however, one cannot say anything definite on this subject. Both 

 families are related to one order but are very far from each other. 



The third species --Hexostoma thynni is known from two species 

 Thunnus (Thunnidae) and from Sarda sarda (Bloch. ) (Cybiidae) but the close 

 relations between those families has already been indicated (see page 230). 



Thirteen species of monogenetic trematodes are encountered 

 on two species of fishes of different genera related to different families 

 of the same order, specifically: Choricotyle charcoti (DoUfus), Ch. smaris 

 (Ijima), Dactylogyrus inversus Goto and Kikuchi, Diplectanum aequans 

 (Wagener), Encotyllabe pagrosomi MacCallum, Gyrodactylus medius 

 Kathariner, G. fairporti Van Cleave, Microcotyle mouwoi Ishii and 

 Sawada, Tetrancistrum sigani Goto and Kikuchi, Pseudaxine indicana 

 Chauhan, Trochopus brauni Mola, Megalocotyle zschokkei Mola and 

 Capsala martinieri Bosc. 



The question here about hosts of Choricotyle charcoti and Ch. 

 smaris is complicated by the circumstance that these worms parasitize 

 not only fishes themselves but also parasitic isopods (see page 431) which 

 can transfer from one fish to another, carrying with them the Choricotyle 

 which are present on them and by this fact confuse the true picture of the 

 interrelations between the parasites and fishes. However, the existing 

 data do not differ greatly from the majority of those which have already 

 been discussed. Thus, Ch. charcoti is encountered on Meinertia oestroides 

 Risso from Trachurus trachurus (L. ) (Carangidae) and on the same isopod 

 from Box boops (L. ) (Sparidae); according to Berg both families of fishes 

 are related to one superfamily Percoidae. Ch. smaris is encountered on p. 234 

 Cymothoa species from the buccal cavity of Smaris vulgaris Cuv. and Val. 

 (Smaridae) and in addition apparently was discovered on Meinertia oestroides 

 Risso (probably from Box boops) and on Bopyrus squillarum (Latr. ) (host?) 

 (he means the fish host of this isopod is xanknown, nobis). Consanguinous 

 relations between Smaridae and Sparidae are certain. 



259 



