BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



735 



Mustelus canis Continued. 



Throughout the region, very abundant in shal- 

 lower waters, on all kinds of bottom. Taken 

 in traps (sometimes 100 or more at once) and 

 on lines; occasionally in the seine. Present 

 from May to November, but most abundant in 

 June. 



Females containing eggs and embryos taken 

 throughout the summer. Bumpus believes 

 that there are probably two broods, in June and 

 August, respectively. Thompson reports the 

 capture of three females containing 27 em- 

 bryos, 10 to ii cm. long as late as about Sep-- 

 tember 25. 



Food: Homarus americanus , Libinia emarginata, 

 Cancer irroratus. Verrill and Smith. Mostly 

 crabs. H. M. Smith. Usually crabs (Pano- 

 peus, Ovalipes, Cancer, Libinia, etc.), also 

 squid, annelids, and fish. Linton. In order 

 of frequency: Cancer irroratus, Libinia emar- 

 ginata, Homarus americanus, fishes (men- 

 haden, puffer, scup, pipefish, sculpin, stickle- 

 back), Ovalipes ocellatus, Loligo pealii, Nereis 

 (mostly N. -virens), eelgrass (Zostera marina), 

 Pagurus pollicaris, Ensis directus, Upogebia 

 affinis, Panopeus depressus, Palamonetes iiul- 

 garis, amphipods, small gastropods. I. A. 

 Field. 



Parasites: Nematodes (Linton) Ascarissp. Ces- 

 todes (Linton) Calliobothrium eschrichtii, C. 

 verticil laium, Dibothrium sp., Otobothrium cre- 

 nacolle, Phyllobothrium loliginis, Rhyncho- 

 bothrium bulbifer, R. heterospine, R. lom-enta- 

 ceum, R. tumidulum, Synbothrium filicolle, 

 Tetrarhynchus sp. Copepods (C. B. Wilson) 

 Alebion gracile, A. glabrum, Pandarus sinuatus. 



Galeocerdo tigrinus Muller & Henle. Tiger shark. 



Baird, 1873; Verrill and Smith, 1873, p. 521; 

 Goode, 1884, p. 673; Jordan and Evermann, 

 1896, p. 32; H. M. Smith, 1898, p. 88; Linton, 

 1901, p. 425; Kendall, 1908, p. 3. 



Woods Hole, 1871. Goode. Vineyard Sound 

 and Buzzards Bay, in traps, occurring from 

 August till October, rarely before August; 

 present every year in variable abundance. 

 Smith. Formerly more common. Edwards. 



Food: Buccinum undatum and Lunatia heros. 

 Verrill and Smith, Goode. Fish (menhaden 

 and bonito), Busycon canaliculatum and 

 squid. Linton. 



Parasites (Linton): Nematodes Acanthocheilus 

 nidi/ex, Ascaris brevicapitata. Cestodes Cross- 

 obothrium angustum, Monorygma sp., Orygma- 

 tobothrium paulum, Synbothrium filicolle, Tet- 

 rarhynchus bicolor, Thysanocephalum crispum. 



16269 Bull. 3 1 - Pt 2 Z 3 1 3 



Prionace glauca (Linnaeus). Great blue shark. 



Jordan and Evermann, 1896, p. 33; H. M. Smith, 

 1898, p. 88; Sharp and Fowler, 1904, p. 505; 

 Kendall, 1908, p. 4. 



Buzzards Bay, at breakwater, one taken in July, 

 1877. One 70 cm. long taken at Menemsha 

 Bight, August 4, 1905 (collected by Edwards, 

 identified by Osburn, Cole and Sumner). 

 Another, which was reported to be about 12 

 feet long, was taken in a trap at the same 

 point August 21, 1906; and large specimens 

 were reported during the summers of 1907 and 

 1908, three being taken in the latter year. 

 Edwards. Nantucket. Sharp and Fowler. 



Parasites (Linton): Anthrobothrium laciniatum, 



Crossobothrium angustum. 

 Carcharhinus obscurus (Le Sueur). Dusky shark. 



Verrill and Smith, 1873, p. 520 (Eulamia ob- 

 scura); Bean, 1884 (Carcharias obscurus); Jor- 

 dan and Evermann, 1896, p. 35; H. M. Smith, 

 1898, p. 88; Linton, 1901, p. 426; Sharp and 

 Fowler, 1904, p. 505: Kendall, 1908, p. 4. 



Vineyard Sound and Buzzards Bay, common. 

 Present from June i through part of Novem- 

 ber; taken in traps and on lines. Smith. 

 Not so abundant as formerly. Edwards. 



Food: Homarus ainericanus, Cancer irroratus. 

 Verrill and Smith. Fish (menhaden and 

 squeteague). Linton. 



Parasites: Acanthocephala (Linton) Echinor- 

 hynchus clavceceps. Cestodes (Linton) Antho- 



. bothrium laciniatum, Crossobothrium angustum, 

 Discocephalum pileatum, Otobothrium crena- 

 colle, Phoreiobothrium lasium, P. triloculatum, 

 Platybothrium ceri'inum, Rhynchobothrium spe- 

 ciosum, R. tumidulum, Synbothrium filicolle, 

 Tetrarhynchus bicolor, T. bisulcatus, T. robus- 

 tus, T. sp. Trematodes (Linton) Gasterosto- 

 mumarcuatum. Copepods(C. B. Wilson) Ale- 

 bion gracile, Pandarus smithii, P. cranchii, 

 Perissopus communis. 



Carcharhinus milberti (Muller & Henle). Blue 

 shark. 



Verrill and Smith, 1873, P- 5 21 (Eulamia mil- 

 berti); Baird, 1873 (Eulamia milberti); Jordan 

 and Evermann, 1896, p. 37 ; H. M. Smith, 1898, 

 p. 88; Linton, 1901, p. 426;Kendall, 1908, p. 4. 



Four specimens about 4 feet long taken in a trap 

 near the local breakwater, August 8, 1873. 

 Smith. None seen since. 



Food: One specimen contained a large quantity 

 of Yoldia sapotilla. Verrill and Smith. Bo- 

 nito. Linton. 



Parasites (Linton): Immature nematodes; ces- 

 todes Anthobothrium laciniatum, Crossoboth- 

 rium angustum, Monorygma sp., Phoreioboth- 

 rium lasium, Platybothrium parvum, Rhyncho- 

 bothrium tenuispine. 



