362 



BULLETIN OF THE BUREAU OF FISHERIES. 



PARASITIC COPEPODS. 



1 . /.. rnseoru ma sp. 



Tw i gill cover and 1 in flesh of abdomen near anal opening. 



Body filled with red fluid which circulates by means of somewhat irregular pulsations. It was 

 observed to grow gradually slower and slower, thru pause. After a short time it would resume and 

 go at the rate of from 100 to 108 beats a minute. 



Pulsations were also noted at the arch of the neck next to the antler-like branches of the head. 

 The head was also filled with red fluid; neck ami branches yellowish by transmitted light. Length, 

 head and neck 6 mm.; body <> mm.; egg chains 8.5 mm. Considerable irritation is produced by this 

 parasite. The tissues where the head and neck were buried were e or less congested ami inflamed. 



These together with other copepod parasites collected by me at Beaufort have been turned over to 

 Prof. 0. I!. Wilson. 



Scomberomorus maculatus, Spanish Mackerel. 



Tin- viscera of a fish from the market, reported to me to he a mackerel, probably belong here. 

 Examined on July 8, L901. Fragments of fish in alimentary canal. 



CESTODES. 



1 , Rhynchobothriurn sp. 



One. Tlie larva has some points of resemblance in essentials with the specimens from Elops 

 Squrus, hut is smaller, and the part behind the contractile bulbs is slender. 



Dimensions of living specimens in millimeters: Length 3.43; length of bothrium 0.63, of contractile 

 bulbs ().:;"), of part behind bulbs 0.63. A comparison of the preserved material shows thai the 

 contractile bulbs have approximately the same length. The probocides in this specimen were only 

 partly evaginated, but so far as could be made out they are in close agreement with the species from 

 Elops (figs, '.in, bill). 



The same specie.- is represented by No. :; under Scomberomorus regalis. 



2. Tetrarhynchus bisulcaius Linton. 



.Inly *; I scolex, on viscera, very active. 

 :;. Synbothrium filicolle Linton. 



July *, lew, on viscera. Aug. 1; 1; similar to No. i; under Scomberomorus regalis. 



TKE.M \ Tonus. 



-I. Gasterostomum baculum sp. nov. [Figs. 233, L'44.] 



llKll. — Aui_'. 30, ii. This is the species recorded from this host before. 



See No. s ( Gasterostomum sp. ) under N. maculatus, Bulletin U. S. Fish Commission for 1899, p. -117. 

 Dimensions, in millimeter.*, life: Length 2; maximum diameter 0.4; anterior sucker, length 0.17, 

 breadth 0.19; ventral sucker, length 0.069, breadth 0.065; ovum 0.021 by 0.014. 



Scomberomorus regalis, ( 'ero. 



