278 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



(4) August 1; one; stomach with nearly digested remains of small fish; no parasites. 



(5) August 5; eight; stomachs empty except in one case, where nearly digested small fish were 

 found, also jaws of small squid and small arthropods, apparently copepods and amphipods. One 

 slender blastocyst liberated from cyst on pyloric cieca, very active. See page 300 for additional 

 details. 



(6) August 8; fourteen; the stomachs of most of them with fragments of nearly digested fish. A 

 few copepod parasites from the mouth of one, other heads not examined. One cyst from viscera, 

 not determined. 



Gasierostomum arcitatum, few, from pyloric cspca at juncture with intestine. See (1) ante. 



(7) August 10; seven; August 11, one; stomachs of several contained partly digested small fish. 

 One larva (Tetrarhynchus), also a few cysts, not determined, from stomach wall. Two of these had 

 become degenerated. Two elongated cysts on pyloric Cieca. 



(8) August 15; two; stomach contents not noted, probably empty. No parasites found. 



18. Scomberomorus regalis, Spanish Mackerel. 



August 16; one; stomach nearly empty, the vertebra of a small fish being all that was distin- 

 guished. Numerous cysts containing blastocysts and larva; (Syribothrium) under serous membrane on 

 pyloric ca^ca and ovaries. (Larval Cestode Parasites of Fishes, p. 815-820, pi. LXVIII, fig. 7-12.) 

 The posterior end of one of the blastocysts was bifurcate. 



19. Xiphias gladius, Sword-fish. 



July 17; two; stomachs with hake, young cod, and beak of -a squid. These fish had a number 

 of trematode parasites on the gills (Tristominn), most of which, however, had been removed before I 

 saw the fish. The following were obtained by me: 



Ascaris incurra, from stomach, 24, large and small together. 



lihynchobothrium alteniiatum (Larval Cestode Parasites of Fishes, pp. 805-806, pi. LXV, figs. 8-11). 

 Three found on serous membrane in vicinity of reproductive organs of one of the fish. One of 

 these larva, while lying in fresh water, extended itself until it was 130 mm. or more in length. 



Dibothrium plicatum (Cestode Parasites of Fishes, pp. 430-431). Two specimens from one host 

 and one from the other. These specimens were all in the rectum of their several hosts and firmly 

 attached. In two cases the heads penetrated simply the mucous and submucous coats. The other 

 specimen had penetrated the intestinal wall and was surrounded by a globular cyst about 12 mm. 

 in diameter which protruded into the body cavity. 



Tristomum coccinenm, from gills; 4 specimens. (Trem. Par. Fishes, pp. 509-510, pi. XL, fig. 9.) 



20. Naucrates ductor, Pilot-fish. 

 August 23; one; stomach empty. No entozoa. 



21. Pomatomus saltatrix, Blue-fish. 



(1) July 20; one; stomach with young herring. Numerous small cestode cysts (Tetrarhynchns) 

 in stomach wall. Elongated cysts (Synbothriwn) on mesentery and serous covering of viscera. 



(2) July 21; two; stomach of one empty, the other with fragment of squid (Loligo). Numerous 

 cysts in stomach wall (Tetrarhynchua); several elongated blastocysts with thin or imperfect cysts on 

 viscera (Syribothriuni). 



(3) July 23; one; stomach contained a small cunner (Tautotjolabrus). The usual large numbers 

 of cysts (Tetrarhynchns) in submucosa of stomach. See page 301 for additional notes. 



(4) July 25 ; one ; stomach contained pieces of squid ( Loligo). Numerous cestode cysts on viscera 

 and in liver. 



(5) July 30; one; stomach empty. Large cysts containing blastocysts, which were active when 

 liberated, three on mesentery and one in stomach-wall between mucosa and submucosa. The larva? 

 proved to be examples of the species Rhynchobothrium speciosum. (Larval Cestode Parasites of Fishes, 

 pp. 801-805, pi. LXIV, figs. 13-14; LXV, figs. 1-7.) 



(6) AugustS; two; stomachs contained partly digested fish. No entozoa found except a small, 

 immature nematode in the stomach. 



