BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



739 



Family NARCOBATID^B. 



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 bisiilcatus. 



Family DASYATID^. 



Dasyatis centrura (Mitchill). Sting ray. 



Baird, 1873 (Trygon centrura) ; Verrill and Smith, 

 1873, p. 521 (Trygon centrura); Bean, 1834 

 (Trygon centrura); Jordan and Evermann, 

 1896, 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 irroralus, Loligo pealii, Mya are- 

 naria, Polyniccs heros. 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, Lccanicephalum pelta- 

 tum, Onchobothrium uncinatum, Orygmato- 

 bothrium crenulatum, Paratccnia medusia, Phyl- 

 lobothrium foliatum, Rhinebothrium cancellat'- 

 tum, R. flexile, Rhynchobothrium hispidum, R. 

 imparispine, R. longispine, R. tenuispine, R. 

 wageneri, Spongiobothrium variabilc, 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. 



fDasyatis hastata (DeKay). Sting ray. 



Storer, 1867, p. 269 (" Pastinaca hastata" uncer- 

 tain whether D. hastata or D. centrura 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^J. 



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, Echeneibothrium sp., Rhinebothrium 

 longicollc, 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, Tyloccphalum pingue. 



