594 



BULLETIN OF THE BUREAU OF FISHERIES. 



iVectonema agile Verrill. 



Yerrill and Smith, 1873, p. 453 (a "slender round 

 worm"); Verrill, 1879, p. 187 (Nectonema 

 agilis, sp. nov.; assigned doubtfully to the 

 Nematoda); Ward, 1892; Bumpus, iSgSb. 



Vineyard Sound. Verrill, F. R. Lillie. Woods 

 Hole. Woodworth, Andrews. Newport. A. 

 Agassiz, Fewkes. 



Swims actively at the surface in the evening in 

 June and July. Ward regards the body 

 structure as indicating that this worm is a para- 

 site during its larval life. 



Pontonema marinum Leidy. 

 Verrill and Smith, 1873, p. 634, 325, etc. 

 Vineyard Sound, "very abundant from above 

 low- water mark to 10 fathoms;" rocky shores, 

 beneath stones, among algas, hydroids, etc.; 

 adults taken in surface tow, in February. 

 Pontonema vacillatum Leidy. 



Verrill and Smith, 1873, p. 634, 326. 

 Occurrence similar to that of P. marinum. 



Spiroptera pectinifer Linton. 



Linton, 1901, p. 411, 427 (sp. nov.). 

 From stomach of Sphyrna zyg<zna. 



Class ACANTHOCEPHALA. 



Echinorhynchus acus Rudolphi. 



Linton, 1889, p. 492; Linton, 1891, p. 525; Lin- 

 ton, 1901, p. 409, etc. 



Hosts: Alosa sapidissima, Carcharias littoralis 

 (spiral valve), Cynoscion regalis, Enchelyopus 

 cimbrius (intestine), Fundulus diaphanus , Fun- 

 dulus heteroclitus , Gadus callarias , Hemitripterus 

 americanus, Hippoglossus hippoglossus, Lepto- 

 cephalus conger (intestine), Limanda ferruginea 

 (intestine), Lophius piscatorius (intestine), 

 Lophopsetta maculata, Macrourus bairdii, Mela- 

 nogrammus ccglefinus, Merluccius bilinearis 

 (intestine), Microgradus tomcod, Mola mola 

 (gills), Myoxoccphalus aneus, Myoxocephalus 

 octodecimo pinosus , Opsanus tau (intestine), 

 Paralichthys dentatus (intestine), Paralichthys 

 oblongus (intestine), Pholis gunnellus, Pol- 

 lachius -virens, Pomolobus ccstivalis, Pomolobus 

 mediocris, Pomolobus pseudoharengus, Porono- 

 tus triacanihus, Prionotus carolinus, Prionotus 

 strigatus, Pseudopleuronectcs americanus (intes- 

 tine), Raja eglanteria, Roccus lineatus, Scomber 

 scombrus, Spheroides maculatus (pharynx), 

 Stenotomus chrysops (viscera), Tautoga onilis, 

 Trichiurus lepturus, Urophycis chuss (intes- 

 tine), Urophycis tenuis. 



Echinorhynchus clavaceps Zeder. 



Linton, 1889, p. 490 (Echinorhynchus agilis); 

 Linton, 1891, p. 534 (E. agilis); Linton, 1901, 

 p. 409, etc. (E. agilis). 



Hosts: Anguilla chrysypa (intestine), Carcha- 

 rhinus obscurus (spiral valve), Fundulus hetero- 

 clitus, Morone americana (intestine), Opsanus 

 tau, Tylosurus marinus (intestine). 



Echinorhynchus attenuatus Linton. 



Linton, 1891, p. 529 (sp. nov.). Linton, 1900, 



p. 409, 435. 

 Host: Acipenser breuirostrum (=sturio). 



Echinorhynchus carcharice Linton. 



Linton, 1891, p. 536 (sp. nov.), Linton, 1901, p. 



409, 428. 

 Host: Carcharias littoralis. 



Echinorhynchus fusiformis Zeder. 

 Linton, 1901, p. 409, 468. 

 Host: Opsanus tau (intestine). 



Echinorhynchus globulosus Rudolphi. 

 Linton, 1901, p. 409, 435. 

 Hosts: Acipenser rubicundus, Anguilla chrysypa. 



Echinorhynchus lateralis Molin. 



Linton, 1891, p. 533 (Echinorhynchus incrassatus); 

 Linton, 1901, p. 409, etc. (E. incrassatus). 



Hosts: Lophius piscatorius, Paralichthys dentatus, 

 Pomatomus saltatrix, (in each case from peri- 

 toneum). 



Echinorhynchus pristis Rudolphi. 



Linton, 1891, p. 530; Linton, 1901, p. 409, etc. 



Hosts: Carangus crysos, Cynoscion regalis (vis- 

 cera), Lobotes surinamensis (intestine), Lophius 

 piscatorius, Palinurichthys perciformis (intes- 

 tine), Tylosurus acus. 



Linton (1891, p. 531) lists a variety tenuicornis, 

 which he found in "Tylosums caribbanis" 

 (doubtless acus or marinus), and in Lobotes 

 surinamensis. 



Echinorhynchus proteus Westrumb. 



Linton, 1889, p. 496; Linton, 1891, p. 537; 

 Linton, 1901, p. 409, etc. 



Hosts: Archosargus probatocephalus (peritone- 

 um), Carangus hippos, Centropristes striatus, 

 Cynoscion regalis (intestine), Merluccius bili- 

 nearis, Paralichthys dentatus (mesentery), Po- 

 matomus saltatrix (intestine, usually with head 

 perforating the wall), Roccus lineatus (always 

 present in rectum). 



