NICHOK.S iV MITRPIIV 
i.oxc't island sharks. 
A \videl\- distributed tr()])ical shark, much dreaded in West Indian 
waters. Stragglers occur north to Cape Cod. The writers have 
examined the jaws and ])art of the head of a specimen caj^tured in a net 
at IsHp, on September i i, 1915, b>' Captain John Doxsee. 
The tiger shark is ])re.sent every year in variable abundance in 
\'ineyard vSound and Buzzard's Bay, Mass., where small examples are 
often caught in the fish traps. Formerly it is said to have been more 
common than of recent years. 
Its food is known to include whelks, conchs, and squids, as well as 
fishes (menhaden, bonito). 
4. GREAT BLUE SHARK 
Prioiiace glaitca ( Linne ) 
Jordan and Everniann, p. 33. 
Galeus glaiiciis, Garmaii, p. 145. 
l'"irst dorsal fin much larger than the second dorsal, opposite space between 
pectoral and ventral fins, nearer to the ventrals. Body slender, snout long. Angle 
of mouth without a long groove extending along one or both jaws. Teeth strongly 
serrate, those of the upper jaw somewhat oblique, those of the lower narrower and 
erect. Steel blue, Ught bluish, or grayish above, paler below. Length 10 feet. 
The great blue shark is a large, warm-water s])ecies occasionally 
reaching our coast. It has been taken half a dozen times in fi.sh traps at 
Woods Hole, Ma.ss., during the months of Jul\- and August, and a large 
specimen captured near Cit>- I.sland in late October, 191 1, was ])re,sented 
to the American Museum of Natural Hi.story by Mr. Alfred Frank of 
New York. 
This .shark belongs to the group of wide-ranging, ])elagic species, 
concerning the life history of which relativel>- little is known, although 
most of the shark stories that we read in tales of the .sea refer to one of 
them. In common with other pelagic sharks, the blue .shark brings forth 
its young alive. 
