NO. 1560. PAJLLSITES OF BERMUDA FISHES— LINTON. 95 



HETERAKIS, species. 



Plate II, Hgs. 11 to 14; Plate III, tigs. 15 to 20. 



This agrees very closely with a form from the liounder." 



The body is rather plump, truncate anteriorly, tapering- posteriorl3^ 

 Mouth bilabiate, but in some cases appearing to be obscurel}' trilobed 

 in dorsal or ventral view. Lips armed with very numerous small 

 teeth of nearly uniform size and shape, and each provided with about 

 three papilhe. Diameter of neck but little less than that of the bod}^ 

 but narrowing ^slightly very near the anterior end. The esophagus is 

 much narrower than the neck. It is largest at the anterior end, where 

 it expands into the phaiynx. Its smallest diameter is a little in front 

 of its middle point, whence it enlarges posteriorly, the posterior third 

 being nearl}' cylindrical. The reproductive aperture of the female is 

 a little back of the middle. The uterus is voluminous, the eggs being 

 retained in it until segmentation has begun. Behind the anal aperture 

 of the female there are two papilla?. The postanal region is some- 

 what variable in length and is mucronate at the tip. 



Transverse sections show that the cuticle is unusually thick, espe- 

 ciall}' toward the anterior end. The character of the esophagus, as 

 revealed in sections, is much like that of the preceding species. 



These worms have been found thus far widely distributed, but only 

 in very small numbers. 



In Fundulus heteroclitu>< at Woods Hole, Massachusetts, males of this 

 or a closely allied species were found.* The genital papilla in these 

 males are arranged as follows: In the postanal region, lateral view, 

 there are three larger papilhv with three smaller papilhe lateral to 

 them, the most anterior of the larger papilhe being very close to the 

 anal aperture and lateral to it. In the preanal region, lateral view, 

 there are two large papilhe near together a little anterior to the anal 

 aperture and lateral, two others between these and. the bursa, and two 

 in front of the bursa, thus making in all twelve postanal and twelve 

 preanal papillae. 



NOTES ON HABITATS. 



Haemulori carhonarlum. 



July 31, one. Dimensions in millimeters, life, slightly compressed: 

 Length ■!; diameter, anterior 0.16, middle 0.40, at genital aperture 

 (2.25 from posterior end) 0.36, at anal aperture 0.09; distance from 

 anal aperture to posterior end 0.15; esophagus, length 0.53, diameter, 

 anterior (pharynx) t>.12, middle 0.05, base 0.08. 



«Bull. U. S. Fish Com. for 1899, p. 481, pi. vii, figs. 57-61. See also Bull. Bureau 

 of Fisheries, XXIV, pp. 325, 390, 392, 412, 414, figs. 24, 25. 



&Bull. U. S. Fish Com. for 1899, p. 441, pi. xvii, figs. 207, 208. 



