BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 
589 
Spongiobothrium variabilc Linton. 
Linton, 1889, p. 462 (sp. nov.); Linton, 1890, 
p. 778; Linton, 1897a, p. 442; Linton, 1901, 
P- 4i3. 433- 
From spiral valve of Dasyatis centrum. 
Synbothriuvi filicolle Linton. 
Linton, 1890, p. 861 (Syndesmobotkrium filicolle, 
sp. nov.); Linton, 1897, p. 815; Linton, 1901, 
p. 413. etc - 
Scolex in spiral valve of Dasyatis centrura; 
cysts in viscera of following species: Brenoortia 
tyrannus, Carcharhinus obscurus, Cynoscion 
regalis, Galeocerdo tigrinus, Lobotes surinam- 
ensis, Mustelus canis, Paralichthys dentatus 
Pomatomus saltatrix, Scomberomorus cavalla, 
Scomberomorus maculatus, Scomberomorus re- 
galis, Seriola dumerili. 
Tcenia chamissonii Linton. 
Linton, 1905 (sp. nov.). 
About 25 cysts found in mesentery of a “skunk 
porpoise” ( Lagenorhynchus acutus) captured at 
Menemsha Bight, October 7, 1901. 
Tcenia dilatata Linton. 
Linton, 1889, p. 488 (sp. nov.); Linton, 1897a, 
p. 425; Linton, 1901, p. 414, 435. , 
From intestine of Anguilla chrysypa. 
Tcenia sp. 
Linton, 1901, p. 414,428,435. 
Undetermined worms referred to this genus 
found in Anguilla chrysypa, Fundulus dia- 
phanus, and in Sphyrna zygaena (mucous mem- 
brane of intestine). 
Tetrarhynchus bicolor (Bartels). 
Linton, 1901, p. 414, etc. 
Adult taken once in Carcharhinus obscurus; cysts 
and scolices found in the following hosts: 
Carcharinus obscurus, Coryphcena hippurus 
(peritoneum), Galeocerdo tigrinus (stomach), 
Paralichthys dentalus (alimentary canal), Sarda 
sarda, Xiphias gladius (peritoneum and mesen- 
tery). 
Tetrarhynchus bisulcatus Linton. 
Linton, 1889, p. 479 ( Rhynchobothrium bisulca- 
tum, sp. nov.); Linton, 1890, p. 857; Linton, 
1897, p. 810; Linton, 1897a, p. 452; Linton, 
1901, p. 414, etc. 
Adults very abundant in the pylorus and intes- 
tine of Carcharhinus obscurus; cysts and sco- 
lices in the viscera of the following species: 
Cynoscion regalis, Decapterus macarellus, Lo- 
phius piscatorius , Lopholatilus chamceleon- 
ticeps, Paralichthys dentatus, Paralichthys 
oblongus, Pomatomus saltatrix, Poronotus 
triacanthus , Prionotus carolinus, Prionotus 
T etrarhynchus bisculcatus — Continued. 
strigatus, Pseudopleuronectes americanus, 
Scomber scombrus, Seriola zonata, Spheroides 
maculatus, Stenotomus chrysops, Tetronarce 
occidentalis , Urophycis chuss, Xiphias gladius. 
Tetrarhynchus elongatus (Wagener). 
Linton, 1897, p. 812; Linton, 1901, p. 414, 466. 
From liver of Mola mola (common). 
Tetrarchynchus erinaceus Beneden. 
Linton, 1897, p. 811; Linton, 1901, p. 414, etc. 
Cysts in viscera of Cynoscion regalis, Pomatomus 
saltatrix and Poronotus triacanthus . 
Tetrarhynchus linioni Vaullegeard. 
Linton, 1890, p. 853 (T. tenue, sp. nov.); Linton, 
1.897a, p. 452; Linton, 1901, p. 414, 433 
(T. tenuis). 
Spiral valve of Dasyatis centrura. 
Tetrarhynchus robustus Linton. 
Linton, 1890, p. 855 (sp. nov.); Linton, 1897a, 
p. 452; Linton, 1901, p. 414, etc. 
Adults from Carcharhinus obscurus, Dasyatis 
centrura (stomach and pylorus), Isurus dekayi 
(scolex in spiral valve), Myliobatis fremin- 
villei, Raja laevis, Rhinoptera bonasus; cysts 
from Paralichthys dentatus. 
Tetrarhynchus sp. 
Linton, 1901, p. 414, etc. 
“Cysts too immature for identification or not yet 
identified” recorded for the following hosts: 
Carcharinus obscurus, Chcetodipterus faber, 
Dasyatis centrura, Lophius piscatorius , Mus- 
telus canis, Pomolobus mediocris, Poronotus 
triacanthus , Pseudopleuronectes americanus , 
Raja erinacea, Sarda sarda, Scomberomorus 
regalis, Spheroides maculatus, Sphyrna zygaena, 
Terapterus imperator. 
Thysanocephalum crispum Linton. 
Linton, 1889, p. 464 ( Phylloboihrium thysano- 
cephalum, sp. nov.); Linton, 1890, p. 823; 
Linton, 1891a, p. 543; Linton, 1897a, p. 448; 
Linton, 1901, p. 414, 426. 
From spiral valve of Galeocerdo tigrinus. 
Thysanocephalum ridiculum Linton. 
Linton, 1901, p. 414, 430 (sp. nov.). 
From spiral valve of Isurus dekayi. 
Trilocularia gracilis Olsson. 
Adult from Squalus acantkias . — Linton, MS. 
Tylocephalum pingue Linton. 
Linton, 1890, p. 806 (sp. nov.); Linton, 1901, p. 
414. 434- 
From spiral valve of Rhinoptera bonasus. 
Cestode, undetermined (belonging to a new genus 
allied to Ligula). 
From Liparis liparis. 
