PARASITES OF FISHES OF BEAUFORT, NORTH CAROLINA. 347 



July 22, 1, with a few fragments. July '.'4, 16, with many free segments from two rays. July 25, 

 numerous in each of two rays. July 27, 8, with ripe segments. 



1902. — July 29, fragments of strobiles; no scolices. A.ug. 16, 1. Aug. 20, 1. 



4. Rhinebothrium fit i He Linton. 



1902. —Aug. 16, few, small; Bothria not hinged, loculi numerous. 



5. Rhinebothrium sp.; spiral valve. 



1901. — July 12, numerous. These worms agree, in superficial characters at least, with /.'. flexile, 

 except in the number of loculi on the bothria. In this particular they are nearer /■'. minimum. The 

 bothria are distinctly slender and linear, pointed when extended, very versatile, with two rows of 

 loculi, about twelve in eaeh row, with an odd loculus at each l-i\<1; pedicels cylindrical and somewhat 

 elongate. The rows of loculi are interrupted at the middle of the bothrium, where the musculature is 

 such as to give the appearance of a transverse hinge. The bothria thus agree closely with A', longicolle, 

 but, while there is a short neck in this species, it is not separated from the body by a constriction as 

 in the other. A red pigment spot was present in most of the specimens at the junction of the neck 

 with the body. The pedieels and neck were covered with minute bristle-like seines. In some there 

 was a faint indication of a terminal mouth, as in larval forms [Scolei polymorphus). In no case, 

 however, either in living or preserved specimens, was anything seen like the myzorhynchus of the 

 genus Echeneibofhrium. First segments very short, subsequent segments squarish, then longer than 

 broad; last segment usually tapering at the posterior end; margins finely crenulate; genital cloaca 

 about anterior fourth on the margin; some strobiles moniliform; mature segments not seen. July 27, 

 a few small specimens, with numerous detached segments. Two free segments probablj belonging 

 to this species wen- observed to be copulating. 



1902. — July 22, few. Aug. 16, very numerous. Aug. 18, very numerous. Aug. 26, numerous. 

 Bothria hinged at middle; live pairs of loculi and a single terminal loculus to each half, or twenty-two 

 loculi to each bothrium. Found in spiral valve. 



6. Spongiobothrium variabile Linton. Spiral valve. 



1901. — July 22, 5 or more. When first seen, these worms had their bothria elongated so as to 

 produce a very different appearance from the specimens upon which the genus was founded. They 

 appear indeed to be very closely related to Rhinebothrium, the bothria being somewhat narrowly 

 elongated, the loculi very numerous, but confined to the margins, as mentioned in the original 

 description of the genus. 



1902. — Aug. 16, 3, no mature segments. 



7. Paratsenia medusia Linton. Spiral valve. 



1901. — July 0; numerous, small, not exceeding 4 mm. in length. These specimens agree closely with 

 this species and are probably identical. It was observed that the segments projected slightly around the 

 posterior border, a feature not noted before. July 24, several, small. 



1902.— Aug. 16, 5. Aug. IS, few. 



8. Phyllobothrium folialum Linton. Spiral valve. 



1901.— July 9, 1. July 22, 1902; 5. Aug. 26, 1. 



9. Anihocephalum, gracile Linton. Spiral valve. 



1901. — July 22, several. July 27, several. 

 1902.— July 22, few. Aug. 16, 26. 



10. Lecanicephalum pellatum Linton. 

 1901.— July 9, 1. July 24, several. 

 1902.— Aug. 18, 3. 



11. Onchobothrium uncinatum Hiesing. [Fig. 127.] Spiral valve. 



1901. — July s, 2, length 48 mm. in alcohol. Sections were made of the maturing segments in 

 order to learn the meaning of what appeared to he a row of apertures along the median line of one of 

 the flat surfaces of the strobile. It was found that they represented points at which the very 

 voluminous vas deferens protruded some of its convolutions through the wall of the proglottis. This 

 character was observed in others of this species later in the season. The arrangement of the repro- 

 ductive organs and the musculature of the neck present some peculiarities in this species which must 

 tie left for a subsequent paper. 



1901.— July 22, 3. July 27, 1, length 60 mm. 



1902. — July 8, 2 scolices and 10 fragments of strobiles. Specimens not in good condition, probably 

 due to the large number of broken shells in the intestines. July 22, 50 from one ray. July 23, few, the 



