344 



BULLETIN OF THE BUREAU OF FISHERIES. 



13. Otobothrium crenacolle Linton. 



L90L— July 15, 1; length 10 mm.; about 5 free segments each 3 mm. in length. July IS, 2. July 

 22, 6, from 4 to 7 mm. in length, posterior segments easily detached; later on same date, 1, small. 

 Aug. 15, 1. 



1902.— July 11, 29. 



14. Tetrarhynchus bisulcatus Linton. 



1901. — July 24, 1, about 20 mm. in length. July 25, 2. The larger of these two specimens 

 appeared to have a longer collar than is usual in this species. The collar was also thin and undulate 

 on the posterior border. The other specimen was smaller than normal for this species. Aug. 5, 12. 

 Aug. 6, 1. Aug. 12, 3. Aug. 15, 2; these two specimens, like those taken on July 25, presented 

 considerable differences from each other. The larger agreed with typical representatives of the 

 species. The smaller, besides the difference in size, also differed in some of its proportions and 

 in having sharper hooks than the larger. In each case the scolex was attached to but a short, piece 

 of the strobile. The following measurements, in millimeters, were made on the scolices after they 

 had lain overnight in sea water to which a little formalin had been added. The dimensions of the 

 smaller specimen are given first in each case: Length 0.35 and 0.7; length of bothria 0.36 and 0.5; 

 diameter of collar 0.25 and 0.42; length of head and neck 0.64 and 0.7; length of bulbs 0.20 and 

 0.21; diameter of bulbs 0.09 and 0.11; diameter of proboscis, excluding hooks, 0.27 and 0.34, including 

 hooks 0.44 and 0.47;'length of longest hooks 0.013 in each. A single specimen collected on the next 

 day. Aug. 16, agreed with the smaller of the two whose dimensions have just been given. Another 

 found later on the same date was typical. 



1902.— Aug. 14, 1. 



15. Synbothrium JUicolle Linton. 



1902. — July 11, 3; encysted in submucous membrane of stomach. There were also numerous cysts 

 in the stomach wall, in which no larvie were found, some of which might have been due to this 

 parasite. One much-elongated specimen was obtained from beneath the serous coat of the liver. 



16. Cysts. 



1902. — July 11, numerous in stomach wall between muscular layer and mucosa. Many of them 

 were tilled with degenerate tissue, but among these two specimens of No. 15 were found. 



Sphyrna tiburo. Bonnet-head Shark. 



The specimen taken on July 25, 1902, was a female with 8 young, each measuring 110 mm. in 

 length. 



NEMATODES. 



1. Filaria galeata, new species. [Figs. 17-19. See also fig. 20.] 



Slender, hair-like, active worms of nearly uniform diameter, maximum diameter near posterior 

 end, whence it tapers very gradually to the anterior end. Head with cushion-like hood (figs. IS, 19), 

 oesophagus equaling about one-eighth the length of the worm, tapering uniformly from base to point 

 just in front of nerve-ring, where there is an offset, thence cylindrical to mouth; diameter of oesophagus 

 at base about twice what it is at the anterior end. 



Posterior end of female conical-pointed; of male provided with lateral outgrowths of cuticle (aire); 

 papill:e not yet completely worked out (fig. 17). Four pairs of post-anal and about the same number 

 of pre-anal papillae were seen. The posterior end of the male has a strong tendency to coil into a spiral 

 when placed in the killing fluid. Some, even, which were killed in a mixture of glacial acetic- acid 



