﻿28 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



an oval area on the left side. The anterior end is folded over in the 

 only specimen collected but is represented extended in figure 6, d. 



Host. — Archosargus probatocephalus (Walbaum). 



Type.—V. S. N. M. Helm. Coll. No. 36960. 



Occurrence. — A single specimen was taken from the gill of one of 

 two hosts on July 10. It is named for Dr. E. W. Price. 



Remarks. — This species differs from Monocotyle ijimae Goto in that 

 it has a shorter body and a relatively larger haptor; the vitellaria 

 extend across the body posteriorly; and the body tapers from near 

 the anterior toward the posterior end; the chief difference is in the 

 large pseudohaptor with its 20 head organs on the present species. It 

 differs from Taschenberg's (1878) 31. mylobatis in its smaller size, the 

 presence of fewer lateral head organs, the shape of the haptoral hooks, 

 the shape of the chitinoid bodies on the haptor, the smaller size of the 

 pharynx, the larger size of the haptor, and in the well-defined central 

 disc of the haptor. 



HETEROCOTYLE FLORIDANA (Pratt) 



On the gills of a single spotted whip ray, Aetohatus narinari 

 (Euphrasen) , 66 of these trematodes were collected in July 18. 



Suborder Polyopisthocotylea : Superfamily 



DiCLIDOPHOROROIDEA 

 Family DISCOCOTYLIDAE 



TAGIA MICROPOGONI, new species 

 Figure 6, g-i 



Body slender; length 1.0 mm., width 0.11 mm. Anterior end 

 slightly bilobate (fig. 6, i). The four pairs of haptoral clamps are 

 attached to the posterior three-tenths of the body. They increase 

 slightly in size posteriorly; length of posterior one 0.66 mm., width 

 0.34 mm. All haptoral clamps are oval in form, truncate at the 

 proximal end; each is supported by a central rod and a thickened 

 margin, which bears a strong spine at about the middle of the median 

 margin and a smaller spine proximal to it (fig. 6, h). The posterior 

 tip of the haptoral clamp is in the form of a delicate lobe bearing a 

 pair of minute hooks. The mouth is terminal and behind it a small 

 pharynx is visible, but behind that vitelline glands fill the body and 

 obscure other organs. The 10 spines around the genital aperture are 

 radially arranged. 



Host. — Micropogon undulatus (Linnaeus). 



Typc—V. S. N. M. Helm. Coll. No. 36961. 



Occv/rrence. — Three specimens were taken from the gills of two of 

 three hosts on July 10. 



Remarks. — This species differs from Tagia ecuadori (Meserve) 

 (syn., Heterohothrium, ecuadori Meserve) in the character and larger 



