NO. 1560. 



PARASITES OF BERMUDA FISHES— LINTON. 



Ill 



mounted in balsam, had the following- dimensions, in millimeters: 

 Length 1.8, breadth 0.83; diameter" of oral sucker 0.08, of ventral 

 sucker 0.08; pharynx, length 0.05, breadth 0.08; ova 0.018 by 0.021. 

 The specimens in the second lot present considerable variation in 

 size and proportions. Three of them agree fairly well, the fourth is 

 larger. It was somewhat macerated and consequently was flattened 

 more than the otiiers when placed under th(^ cover glass. 



jyniiein^'iotix of liiiiKj sj)ecimcih'^. 



The principal difference between this lot and the former is in tlie 

 size of the ova. 

 EpiU(])h(Au>i xtridtux. 



July 11, twent}-; July 11, four; Jul}^ 18, twenty-three. 



Most of the distomes in the first lot were broken. They were faint 

 flesh color l)y rcHccted, yellowish-white by transmittetl light. 



Dimensions of a perfect specimen, in millimeters, life: Length 2.78; 

 breadth, anterior 0.36, at ventral sucker 0.G8; oral and ventral suckers 

 each 0.21 in diameter, with circular aperture; ova 0.015 by 0.022. In 

 the other lots theie was great variety in size and proportions but they 

 are all apparently the same species. 



DISTOMUM FENESTRATUM, new species. 



Plate XII, figs. 86-91. 



Distomum, specie^, Bull. Bureau of Fisheries I'or 1904, XXIV, p. 373, 374, figs. 

 2\3, 214. 



Tt/jw.~C'cit. No. 5801, U.S.N.M. 



This species will eventually have to be referred to a new genus, but, 

 in view of the fact that the individuals thus far found are immature, 

 it seems to me to be best not to give a generic name at present. On 

 account of the ease with which they may ])e recognized, however, a 

 specific designation appears desirable. 



The reproductive organs not heing in evidence, it is not possible to 

 identify it with Pratt's Synopsis. The absence of a pharynx suggests 

 the subfamily GorgodeTinse. 



So far as the anatomy of these distomes was worked out, their char- 

 acterization is as follows: Body subcylindrical, tapering at each end; 

 ventral sucker much larger than oral and situated at about the anterior 

 fifth; pharynx none; esophagus slender, comnumicating' with the 

 capacious intestine a short distance in front of the ventral sucker. 



