NO. 1560. PARASITES OF BERMUDA FISHES— LINTON. 103 



Order TREMATODA. 



Trematodes were found in 29 of the 51 species of tish examined. 

 In many cases only one, and often but veiy few, of a kind were found. 

 In other cases the material was in poor condition, so that identitication 

 was not possible. 



I have employed the old generic name Dtstomum^ but in those cases 

 where the form couUl ])e identified hy the use of Pratt's Synopsis I 

 have added the new generic name. Since manj' of the forms which can 

 not be referred to any genus in Pratt's Synopsis were represented by a 

 single example, or at best by few, and they in poor conditicni, it has 

 seemed l>est not to burden the nomenclature of helminthology with 

 any new generic names at present. 



ENCOTYLLABE, species. 

 Plate VII, tig8. 49-53. 



A single specimen from the gills of Cahiiinix eahainoi, 'l^uly 1<). is 

 referred to this genus. 



Body elliptical, flattened; posterior sucking disk joined to the l>ody 

 by a stalk, provided with two hooks but without radial ridges; two 

 anterior suckers, which were circular in the living but elliptical in the 

 preserved specimen. The anterior end is provided with numerous 

 small lobes, wiiich probably represent two lobate antero-lateral pro- 

 longations of the body with lobulate borders. The genital aperture 

 is on the left side of the median line a short distance ])ehind the 

 left sucker. The specimen was rolled up when first seen and was too 

 fragile to allow of satisfactory manipulation. 



Dimensions, in millimeters, l)alsam: Length 8; length of body 2.25; 

 breadth, anterior 0.6, maximum 1; diameter of stalk 0.1; posterior 

 sucking disk, length 0.45, breadth 0.42: transverse diameter of ante- 

 rior sucker 0.13; length of hooks 0.8. 



MICROCOTYLE, species. 

 Plate VII, tig. 54. 



Body lanceolate, tapering both anteriorly and posteriorly from 

 about the middle. Vitellaria conspicuous along each margin, and 

 leaving only a narrow median line, extending the entire length of the 

 body proper from a point just behind the cirrus. 



Dimensions, in millimeters, life: Length of body proper 4. of pos- 

 terior suctorial part 8.2; breadth, anterior 0.16, maximum 0.6; each 

 anterior sucker, length 0.09, breadth 0.04; about fifty pairs of poste- 

 rior suckers, each, length O.OT, breadth, 0.03. An ovum in oviduct 

 of specimen mounted in balsam measured 0.69 l)v 0.19. 



