NO. 1123. 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



815 



The specimen was quite active when first removed: Length, 7 mm.; 

 diameter in front, 2; diameter middle, 2.5; diameter posterior end, 1.5; 

 diameter of posterior appendage, beginning of strobile, 0.."). 



In the alcoholic specimen a little more than the middle third was 

 dark brown, the two ends were yellowish white. Length of jiroboscis, 

 1 mm.; diameter of proboscis, exclnsive of hooks, at base, 0.11; apex, 

 0,05; length of contractile bnlbs, 1; length of longest hooks, 0.03. For 

 character of hooks see figs. 5, 0. 



I have no color notes on the specimens from the tiger shark, and infer 

 that they were the usual yellowish white of most entozoa. The arrange- 

 ment and character of the hooks agree with those figured for specimens 

 from dusky shark. Dimensions of alcoholic specimen : Length, 5 mm.; 

 maximum diameter, 1.4; length of jm^boscis, 1; diameter at base, 0.10; 

 near middle, O.OS, including- hooks; length of ordinary hooks, (►.020. 



18. SYNBOTHRIUM FILICOLLE, Linton. 

 (Plate VIII, tig.s. 7-12.) 



Siinde.smoboihriiiin jUlcoUc, Lintox, U. S. Fish Com. Rept., 1S87, pp. 861-8ti2, pi. 



XV, figs. 2-4. ' 

 Tetrarhijuehoholhriinn (larva), Amer. Xat., Feb., 1887, p. 199, lA. x, figs. 7-11. 



SynhotliriiDit scole.r, Hill, Proc. T.,inn. Sori. New 8onth Wales (1891), IX, pp. 



75-82, pi. V, ligs. 11-19. 



I have found this parasite in its larval condition — i. e., embryo and 

 blastocyst encysted — frequently and in a variety of hosts, the most 

 usual host being the blueflsh {I'omntomus saltatrix). 



Following is a list of hosts in which I have found this worm. The 

 list also comprises most of the finds of the parasite that I have made; 

 all collections except Xo. 9 made in the vicinity of Woods Holl, Mas- 

 sachusetts: 



Si/nhothrium JiUcollc. 



No. 



tr.S.N.M. 

 number. 



Host. 



5495 

 4824 



'4809' 



'4831 

 5490 

 5486 

 5485 



5992 

 5496 



5491 

 5493 

 5489 



isio' 



4813 



5488 

 4792 



5487 

 4808 



Aug.— ,1884 



do 



do 



do 



do 



July 2t, 1886 

 Aug. 5, 1886 

 Aug. 12, 1886 

 Oct. —,1886 



July 27, 1887 

 July 29, 1887 



July 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Sept. 

 July 

 July 

 July 

 July 

 Aug. 

 Aug. 



30, 1887 

 1, 1887 

 6, 1887 

 8, 1887 

 10, 1887 

 2, 1887 

 9, 1889 

 15, 1889 

 27, 1889 

 29, 1889 

 19, 1889 

 20, 1889 

 — , 1883 



Bliiefish(Poma<om?/s«aJto<Wa!),serouscoveringof stomach, etc. 

 Squeteague {Cynoscion regnlis), out.side of ovary. 

 Squeteague {Ci/noscion regalis), serous covering of viscera. 

 Bluetish (romiitoiniis saltatrix), on stomach and intestine. 

 Blueflsh (I'diiiatoiiins saltatrix), on viscera. 

 Dogfish {Miii^tehis- fiinU), muscular coat of stomach. 

 Blueflsh {Vomatom its saltatrix), serous covering of vi.scera. 

 Cero {Scomberonionm rff/alis), on stomach, liver, etc. 

 Bluetish (Pontatotiiiis saltatrix), mesentery, etc., collected hv 



S. E. Meek, Fulton Market, New York. 

 Pomolobug inediocrin, serous covering of viscera. 

 Blueflsh (I'limaton} us saltatrix), serous covering of vi.scera, and 



between mucous and submucous coats of stomach. 

 Cero (Scomberomorvs regalis), on viscera. 

 Sting Ray {Trygon centritra), stomach wall. 

 Lohotes svrina'tncnsis, serous covering of viscera. 

 Dogflsb {Miisteliis canis), stomach wall. 

 Trygon centnira, stomach wall and si)leen. 

 Common Flounder {Faralichthys il< ntatits), stomach wall. 

 Blueflsh (Pomatomiis saltatrix), serous covering of viscera. 

 Blueflsh (Pomatomvs saltatrix), on liver, .spleen, etc. 

 r.lueti.sh (Pnmatomns saltatrix), serous covering of viscera. 

 Caballe {Scomheromorits caualla), serous covering of viscera. 

 Cero (Scombcromorus regalis), serous covering of viscera. 

 Scowberomoriis macvlatus, seroua covering of viscera. 

 Squeteague (Cynoscion regalis), on viscera (No. 898 U.S.N.M.), 



collected by R. S. I'arr. 



