NO. 1500. PARASITES OF BERMIDA FISHES— LINTON. 93 



Upeneiia rnacidatns. 



Jul}^ 11, one. This specimen was exceptional in that the diver- 

 ticulum of the esophaous was longer than the esophagus. The 

 diverticulum of the intestine was just as long as the basal bulb of the 

 esophagus. 



IMMATURE NEMATODE. 



Plate. I, fig. ;!. 



A fragment of a small nematode from tlio intestine of Ilarpe rufa 

 is different from the foregoing. The fragment is from the posterior 

 end. The post-anal region tapers gradually and is slightly arcuate. 



Dimensions, in millimeters, alcoholic: Length, 5.25; diameter 0.05, 

 at anal aperture 0.(»3: distance from anal aperture to posterior 

 end 0.06. 



HETERAKIS FOVEOLATA Rudolphi. 

 Plate I, tigs. 5-7; Plate 11, tigs. 8-10. 



A small nematode found sparingly in several Bernuida fishes is 

 referred, with some hesitation, to this species. It agrees ver^^ close!}" 

 with specimens found at Beaufort. North Carolina, and referred to 

 this species." 



In the use of the generic name Ileterllis in the Beaufort report I 

 followed Schneider and Stossich. As a matter of fact these nematodes, 

 while agreeing closely with Schneider's description of If. foreoJata^ 

 are much nearer the type species of tlie geims Dacnltix than they 

 are to the type species of IleUirikia. The species Dacn'ith exariens 

 Dujardin is included by Schneider among the synonyms of H. 

 forcolata. 



It would l)e out of place in this paper to enter into a discussion of 

 nomenclature, and luitil a more detailed study can be made I shall 

 retain the name used in my Beaufort paper. 



Head obtuseh" rounded in front; mouth bilabiate; lips dorsal and 

 ventral, each with about two small papilhv, and armed with numerous 

 minute, simple teeth, of uniform size and shape, which make a crown- 

 like border to the mouth. Neck narrowing behind the head, but 

 enlarging again gradually, the body remaining nearly linear from the 

 base of the esophagus to near the posterior end, where it tapers to an 

 acute point. The anterior part of the body is, in many cases, curved 

 backward. The esophagus narrows behind the conspicuous pharynx, 

 then enlarges to the base. 



The genital papilhe, so far as made out, are as shown in fig. 7, 

 namely, six post-anal papilla?, two pairs of which are near the median line 

 and near together; the other two are situated one on each side of the 

 median pairs. Lateral to the anal aperture and near to it on each side 



« Bulletin, Bureau of Fisheries, XXIV, p. 330, etc. 



