588 
BULLETIN OP THE BUREAU OP FISHERIES. 
Rhynchobothrium imparispinc Linton. 
Linton, 1890, p. 840 (sp. nov.); Linton, 1897, 
p. 799; Linton, 1897a, p. 450; Linton, 1901, 
p. 412, etc. 
Adult worms in following species: Dasyatis 
centrum, Myliobatis freminvillei , Raja eglan- 
teria, Raja erinacea (spiral valve), Raja Icevis 
(spiral valve), Raja ocellata, Squalus acanthias. 
Cysts and larvae in the following species: 
Ammodytes americanus, Anguilla chrysypa, 
Ceniropristes striatus (in viscera), Clupea 
harengus (stomach wall), Gadus callarias (peri- 
toneum), Hemitripterus americanus , Lepto- 
cephalus conger (serous coat of intestine), 
Limanda ferruginea (in viscera), Lophius 
piscatorius, Lophopsetta maculata, Melano- 
grammus cBglefinus (peritoneum), Menidia 
menidia notata, Merluccius bilinearis, Micro- 
gadus tomcod (in viscera), Myoxocephalus 
ceneus, Myoxocephalus octodecimspinosus, Os- 
merus mordax, Paralichthys dentatus (in vis- 
cera), Pollachius virens, Pomolobus pseudo- 
harengus, Prionotus strigaius, Pseudopleuro- 
nectes americanus , Raja erinacea, Sarda sarda, 
Scomber scombrus, . Stenotomus chrysops (in 
viscera), Tautogolabrus adspersus, Tetronarce 
occidentalis (intestinal wall), Urophycis chuss, 
Urophycis tenuis, TCiphias gladius. 
Rhynchobothrium lomentaceum Diesing. 
Linton, 1890, p. 845; Linton, 1901, p. 412, 425. 
From spiral valve of Mustelus earns. 
Rhynchobothrium longicorne Linton. 
Linton, 1890, p. 847 (sp. nov.); Linton, 1897a, 
p. 450; Linton, 1901, p. 412, 429. 
From spiral valve of Carcharias littoralis. 
Rhynchobothrium longispine Linton. 
Linton, 1890, p. 835 (sp. nov.); Linton, 1901, 
p. 413, 433. 
Adults from spiral valve of Dasyatis centrum; 
cysts from the following hosts: Menticirrhus 
saxatilis, Paralichthys dentatus, Poronotus tria- 
canthus, Prionotus strigatus, Scomberomorus 
maculatus, Stenotomus chrysops, Urophycis 
chuss. 
Rhynchobothrium speciosum Linton. 
Linton, 1897, p. 801 (sp. nov.); Linton, 1901, p. 
413, etc. 
Adults from Carcharhinus obscurus; cysts in the 
viscera of the following hosts: Chastodipterus 
faber, Cynoscion regalis, Lophius piscatorius, 
Paralichthys dentatus, Pomatomus sallatrix, 
Remora remora, Roccus lineatus, Scomber 
scombrus, Scomberomorus maculatus, Stenoto- 
mus chrysops, Trichiurus lepturus, Tylosurus 
acus. 
Rhynchobothrium tenuispine Linton. 
Linton, 1890, p. 837 (sp. nov.); Linton, 1897a, 
p. 448; Linton, 1901, p. 413, etc. 
Hosts: Carcharhinus milberti (spiral valve), 
Dasyatis centrum (spiral valve), Raja erinacea. 
Rhynchobothrium tumidulum Linton. 
Linton, 1890, p. 829 (sp. nov.); Linton, 1897a, 
p. 448; Linton, 1901, p. 413, etc. 
Adults found in spiral valve of Carcharhinus 
obscurus, Mustelus canis, and Raja erinacea; 
scolices in intestine of Opsanus tau; cysts in 
Spheroides maculatus. 
Rhynchobothrium wageneri Linton. 
Linton, 1890, p. 843 (sp. nov.); Linton, 1901, 
P- 413 . 433 - 
From spiral valve of Dasyatis centrura. 
Rhynchobothrium, sp. undet. 
Cysts from the following hosts: Cynoscion 
regalis, Lophius piscatorius, Pseudo pleuronec- 
tes americanus, Seriola lalandi, Spheroides 
maculatus. 
Scolex polymorphus Rudolphi. 
Linton, 1901, p. 413, etc. 
Hosts: Anchovia argyropkanus, Anchovia brownii 
(larvae in intestine), Anguilla chrysypa, Bre- 
voortia tyrannus (intestine, larvae), Cen- 
iropristes striatus (free in intestine), Clupea 
harengus (intestine, larvae), Cynoscion regalis 
(free in gall bladder and cystic duct), Decap- 
terus macarellus (free in intestine), Decap- 
terus punctatus, Etrumeus teres, Fundulus 
heteroclitus (intestine, larvae), Hippoglossus 
hippoglossus, Lagocephalus Iccvigatus (intes- 
tine, abundant), Leptocephalus conger (in- 
testine, larvae), Limanda ferruginea (intes- 
tine), Lophius piscatorius (free in intestine, 
larvae), Lopholatilus chamceleonticeps (free in 
intestine), Melanogrammus ceglefinus, Men- 
ticirrhus saxatilis (intestine), Merluccius bili- 
nearis (free in intestine), Microgadus tomcod 
(free in intestine), Opsanus tau, Palinurich- 
thys perciformis (alimentary tract), Para- 
lichthys dentatus (cystic duct and free in 
intestine), Paralichthys oblongus (intestine), 
Pomatomus saltatrix (larvae in intestine), 
Pomolobus mediocris (larvae in intestine), 
Pomolobus pseudoharengus (larvae in intes- 
tine), Poronotus triacanthus (free in intestine), 
Raja Icevis, Sarda sarda (larvae free in in- 
testine, rare), Scomber scombrus (larvae free in 
intestine), Spheroides maculatus (free in in- 
testine), Stenotomus chrysops (free in intestine), 
Tautoga onitis, Trichiurus lepturus, Tylosurus 
marinus (larvae in intestine), Urophycis chuss, 
Kiphias gladius. 
