§34 WINTERTON C. CURTIS 
TABLE 2 
5 sharks, captured before July 1, kept without food 3 to 4 weeks 
July 18, all sharks given 4 cc. each of oil of male fern 
July 20, the three surviving sharks given 1 cc. each of calomel 
DATE “IN THis SERIES | SHARE AT DEATH | GrrRAL VALVE REMARKS 
duilyel Oe eer No. 1 Dying 1 strobilla Traces of oil 
dead in stomach 
TUN AD), oth oa bee No. 2 Dead No signs of Digestive tract 
cestodes considerably 
decomposed 
July 21, .......00-| Nos.s,4and 5 Killed No signs of Mucous mem- 
cestodes brane in good 
condition 
TABLE 2a 
1 shark, captured about June 15, and kept without food 
July 1, given several ec. of oil of male fern diluted with ether. 
| « 7 | oe 
NO. GIVEN SHARK | CONDITION OF | CESTODES IN 
EMARKS 
IN THIS SERIES SHARK AT DEATH | SPIRAL VALVE | a 
DATE 
| ee PT | sell oe hs 
| 
Uy FOR cee Killed | No signs of cestodes 
l 
seemed to be dying and was killed with the results indicated. 
No. 2 was found dead, but was a good deal decomposed and so 
the absence of worms may not mean much. The three surviv- 
ing specimens, which were killed twenty-four hours after the 
calomel, were without any cestodes. 
The results of these two experiments may be criticised on the 
ground that the sharks were not left alive long enough to show 
that more would not have died from the treatment, but my expe- 
rience has shown that when the animals survived this treatment 
for two or three days the subsequent mortality was not likely 
to be greater than among any other sharks kept in confinement. 
Some of the sharks noted in other tables were kept alive a much 
longer time. 
