124, REPORT OF NEW JERSEY STATE, MUSEUM. 
of the water, causing considerable noise and disturbance. In size 
they measured 5 or 6 feet. Called ‘“‘thresher” or ‘“‘thresher tail.” 
Mr. W. J. Fox says it has been reported by the fishermen of 
Sea Isle City, at times, to occur off shore and about the pounds. 
Dr. C. C. Abbott tells me a small example was taken, in July 
of 1864, in the inlet back of Atlantic City. He says it was cap- 
tured on a hook, and measured about 2 feet in length. 
Family GALEIDZ. 
Cynais canis (Mitchill). 
Dog Shark. 
Taken by fishermen in Grassy Sound, Cape May county, on 
September 4th, 1897. It was taken at Atlantic City on August 
25th, 1900, by Mr. J. A. G. Rehn, and September, of 1900, by 
Mr. C. W. Buvinger. Reported plentiful off Sea Isle City on 
August 15th, 1905, and one taken October 15th. Mr. W. J. Fox 
reports one taken April 29th, 1906, at Sea Isle City, also on 
July 15th, and again on July 23d. 
Mr. H. Walker Hand says it occurs at Cape May about the 
inlets, sounds, and along shore. It runs up Delaware Bay in the 
pounds to Green Creek at least, and most likely further. About 
6 examples were seen in the pounds at Green Creek, June gth, 
1907. The largest were about 2 feet in length. A small one was 
seen at Green Creek on June 23d. Reported at Barnegat Pier 
on July 30th, 1907. 
Galeocerdo tigrinus Muller and Henle. 
Tiger Shark. 
Large spotted sharks, evidently this species, were reported 
by the fishermen at Sea Isle City, late in July of 1907. 
Carcharhinus obscurus (Le Sueur). 
Dusky Shark. 
Head 6; depth, at origin of pectoral, 614; width of head 
1*/;, in its length; depth of head, at first gill-opening, 1%; 
