440 BULLETIX OK THK UNITED STATKS FISH COJOIISSION. 



Alosa sapidissima, Shinl. 



NKMATODFS. 



1. .IxraW-ssp. [PI. xii, fig^. i;},s, 13!!.] 



Immature; IxHly sleiuler, jaws prominent, apparently four teetli on upper lip; posterior end 

 terminates in an acute conieal point, rouuheneil in most eases with minute sjiines; length, 12 nun. 

 These spii-imens, from V. 8. National Museum <-olleetion, were in a hail state of j preservation when 

 exaniini'il )iy me; ilate of collection and locality not given. 



Brevoortia tyrannus, Mfiihnileii. 



Fool). 



See Peck's valuable contribution, The Sourcis of Marine Foful, Bulletin T'. S. Fish Commi.ssion 

 for 1895, page.- li'il-SfiS. 



Thirty-two inenhailen wen- examined in .Inly anil .Viigust,1899, on eight different ocoa-xions. 

 The character of food could l)e determined only by the use of the microscope, and was invariably 

 vegetable material, especially diatoms. Large nund)ers of diatoms of many kinds weiv found in the 

 intestines of some young specimens, 36 mm. in length, on July 28, 18tt9; al.so in an adult s]>eeimen 

 on August 25, 1899. 



CES-TODtS. 



1. Cysts and blastocysts (Sj/nbothriiim) on viscera. 7, p. 277. 



2. lAiriul <i.'<to<lix {Sfiiltj: pi/li/)iior]ihu>i DajaTiVwi). Small. Free in intestine. 7. p. 277. July 17, 24, 



27, and A\ig. 3, 1899. For account of similar fonns, see 4, pp. 789-792. 



TKE.M.\TOI)t2<. 



3. TUslomum appendlcuUilum Rndnlphi. 7, p. 289, pi. .vx.wi, ligs. 25, 2(5. Aug. 3, 1899; a few in 



intestine. 



4. Dlxlomum rilellosnm Linton. See 7, ]). 290, pi. xx.wii, figs. 38, ;W. One specimen fnunil J\dy 27, 



1.S99. See under Clnpen hat-enijn.i, Xo. (>. 



Stolephorus brownii, Slrijnil AncliDnj. 



FOOD. 



Fifty-two anchovies examineil on seven occasions in 1899, from July 26 to Aug. 15. Intestines 

 usually filled with co]>epods, but in a few cases immense numliers of univalve mollusks wen- found 

 along with co]iepods. 



NEM.\TOI)ES. 



1. liiimatKrr nemalMi: July 2(i, 1899; 1. .\ug. 15, 1899; 1. 



CESTODES. 



2. T/irral trsloth'K (Si-ole.r pob/marpltun Dujardin). Small. Free in intestine. July 26, 1899, ami .\ug. 



3, 1899; several. For account of similar forms, see I, pp. 789-792. 



3. lihunvhobothrhim. Cyst on viscera. Aug. 15, 1899; 1. 



TRKM.V Tonus. 



4. Iiixlomiiiii itppeiuliriitiiliim Kndoliilii. July 31,1899; 12. .\ug. 3.1899; few. 7, p. 289, pi. xxxvi, 



figs. 25, 26. 



5. l>iM<iiiitnii sp. [I'l. XXIX, ligs. 319, 320.] .\ug. 12, 1899. Slender; minutely spinose. 



The life dimensions in millimeters are: Length, 1.71; diameter, anterior 0.09, greatest diameter 

 (one-third of length from head) 0.26, at middle 0.21, near posterior end 0.11; diameter of anterior 

 sucker, 0.07; acetabnltnn, length 0. 10, breadth 0. 13; ova, 0.021 and 0.01 1 in the two principal diameters. 



Amounted specimen is decidedly fusiform, with greatest diameter near. the middle, at the 

 acetabulum. The neck is conical; the anterior sucker somewhat elongated; the pharynx globo.se, 

 remote from oral sucker, and followed by a slender tesophagus, which is longer than the pharynx. 

 The median and posterior jiarts of the body are tilled with ova. Dimensions of mounted specimen 

 in millimeters: Ix-ngth, l.Ui; oral sucker, length 0.07, thickness 0.045; diameter of acctabulmu 0.09; 

 jiharynx, length 0.0.54, thickness 0.041; diameter iti body, anterior 0.065 at ai'etabulum 0.345, near 



