BIOLOGICAL, SURVEY OF WOODS HOLE AND VICINITY. 
739 
Family Narcobatid.®. 
Tetronarce occidentalis (Storer). Torpedo, cramp 
fish. 
Storer, 1867, p. 272 ( Torpedo occidentalis)', Baird, 
1873 ( Torpedo occidentalis)', Jordan and Ever- 
mann, 1896, p. 77; H. M. Smith, 1898, p. 89; 
Linton, 1901, p. 432; Kendall, 1908, p. 13. 
Menemsha Bight, in traps, from May till Novem- 
ber; most common late in the fall, at which 
time several may be taken together at one haul 
of the trap; reported, also, for Buzzards Bay. 
According to Smith the average weight of local 
specimens is 30 pounds. A specimen weighing 
144 pounds was sent to the station from Nan- 
tucket, October 23, 1908. 
Eggs nearly ripe June 23, 1890. — Howard Ayers, 
in Marine Biological Laboratory card cata- 
logue . 
Food: Fish. — Linton. 
Parasites (Linton): Calyptrobothrium minus, C. 
occidentale, Rhynchobothrium bulbifer, R. im- 
parispine, Tetrarhynchus bisulcatus . 
Family Dasyatim;. 
Dasyatis centrum (Mitchill). Sting ray. 
Baird, 1873 (Try gon centrum); Verrill and Smith, 
1873, p. 521 (Trygon centrum)', Bean, 1834 
( Trygon centrum)', Jordan and Evermann, 
1S96, p. 83; H. M. Smith, 1898, p. 90; Linton, 
1901, p. 432; Kendall, 1908, p. 14. 
Common in Buzzards Bay; rare at Menemsha, 
appearing in June or early July. — Edwards. 
Taken in traps. 
Food: Cancer irroratus, Loligo pealii, Mya are- 
naria, Polynices keros. — Verrill and Smith. 
Crustacea and annelids, and in one case a 
small fish. — Linton. 
Parasites: Nematodes (Linton) — Ascaris (?) sp., 
immature Cestodes (Linton) — Acanthoboth- 
rium paulum, Anthobothrium pulvinatum, 
Anthocephalum gracile, Lecanicephalum pelta- 
tum, Onckobothrium uncinatum, Orygmato- 
bothrium crenulatum, Paratcenia medusia, Phyl- 
lobothrium foliatum, Rhinebothrium cancellat- 
tum, R. flexile, Rhynchobothrium hispidum, R. 
imparispine, R. longispine, R. tenuispine, R. 
wageneri, Spongiobothrium uariabile, Synboth- 
rium filicolle, Tetrarhynchus robustus, T. lin- 
toni, T. sp. Trematodes (Linton) — Epib- 
della bumpusii Protozoa (Linton) — Intestinal 
parasites. Copepods (Wilson) — Alebion gra- 
cile, Caligus rapax, Lepeophtheirus thompsoni. 
IDasyatis hastata (DeKay). Sting ray. 
Storer, 1867, p. 269 (“ Pastinaca hastata” — uncer- 
tain whether D. hastata or D. centrum is in- 
tended); Jordan and Evermann, 1896, p. 83; 
Kendall, 1908, p. 14. 
Holmes Hole (Vineyard Haven)? — Storer. 
Pteroplatea maclura (Le Sueur). — Butterfly ray. 
Baird, 1873; Jordan and Evermann, 1896, p. 86; 
H. M. Smith, 1898, p. 90; Kendall, 1908, p. 
14. Buzzards Bay, rare. — Edwards. Observed 
mostly in August and September. — Smith. 
One taken July 28, 1903. 
Food: Crabs. — Edwards. 
Family Myliobatid^. 
Myliobatis freminvillei Le Sueur. Eagle ray, sting 
ray. 
Baird, 1873, Verrill and Smith, 1873, p. 521; 
Jordan and Evermann, 1896, p. 89; H. M. 
Smith, 1898, p. 90; Linton, 1901, p. 433; Ken- 
dall, 1908, p. 15. 
Buzzards Bay; taken in local trap from July 
to October; not very common. — Edwards. 
Food: Homarus americanus in abundance; also 
Cancer irroratus, Mya arenaria, Polynices heros . — 
Verrill and Smith. Large univalve mollusks, 
probably “ Sycotypus.” — Linton. 
Parasites (Linton): Cestodes — Acanthobothrium 
paulum., Eclieneibothrium sp., Rhinebothrium 
longicolle, Rhynchobothrium agile, R. impari- 
spine, Tetrarhynchus robustus. Trematodes — 
Distomum macrocotyle. 
Rhinoptera bonasus (Mitchill). Cow-nosed ray. 
Baird, 1873 ( Rhinoptera quadriloba); Bean, 1884 
(Rhinoptera quadriloba)', Jordan and Ever- 
mann, 1896, p. 90; H. M. Smith, 1898, p. 90; 
Linton, 1901, p. 434; Sharp and Fowler, 1904, 
p. 506; Kendall, 1908, p. 15. 
Buzzards Bay and Menemsha Bight, common 
in traps; 145 taken at Menemsha in one day, 
October 15, 1902. — Edwards. Nantucket, 
Sharp and Fowler. Present from July to Octo- 
ber. 
No eggs noted. — Edwards. Ripe females, July 
12, 1889. — Howard Ayers, in Marine Biologi- 
cal Laboratory card catalogue. 
Food: Clams, gastropods, small lobsters, crabs, 
other Crustacea. — Linton. 
Parasites (Linton): Echeneibothrium sp., Rhine- 
bothrium cancellatum, R. longicolle, Rhyncho- 
bothrium agile, R. brevispine? , Tetrarhynchus 
robustus, Tylocephalum pingue. 
