838 WINTERTON C. CURTIS 
Table 4 shows five cases of entirely successful expurgation 
(Nos.1,2,3,4 and 11). Specimens Nos.9 and 10 had respectively 
one and two worms, while No. 12, since it has two large worms 
with ripe proglottids, does not justify the conclusion that the 
number of the parasites was even reduced, and No. 7 must be 
regarded in the same way. 
TABLE 5 
12 sharks, captured July 25 to August 6, kept without food 
| | 
NO. GIVEN SHARK | CONDITION OF 
pete IN THIS SERIES SHARK AT DEATH | 
REMARKS 
| 
CESTODES IN | 
SPIRAL VALVE | 
August 17, all sharks given 2 cc. each of oil of male fern 
l 
AUgISt 135-4, seee | No. 1 Dying | No worms ~ | Dead worms 
| from anus in 
| handling 
August 18)... ). | No. 2 Dying |» Noworms | 
AUISUISt sl San oneee | No. 3 Dead No worms Dead worms 
| from anus in 
| 
| handling 
August 18, the nine survivors given 3 cc. each of calomel 
AUS USGOU see ee No. 4 Dying | No worms Gut normal 
August Sl... .. 2: No. 5 Kalled No worms Gut normal 
AUPUSt Ol. se. | No. 6 Killed No worms ' Gut normal 
August 31....... |) eNoso 7 Killed No worms | Gut normal 
AU CUStO lee | No. 8 Killed No worms | Gut normal 
August) shee se No. 9 Killed | No worms | Gut normal 
AMICUS hi eee ee No. 10 Active No data _ Escaped 
August 31....... No. 11 Killed 8 C. laciniatum, medium size 
Australes er No. 12 Killed | 4C. laciniatum, medium size 
Table 5 has twelve sharks, less one which escaped during the 
handling. Of these eleven individuals, Nos. 5, 6, 7, 8 and 9 
were without any infection, Nos. 1, 2, 3 and 4 did notsurvive, 
but showed that the drug had killed the parasites. Nos. 11 and 
12 have respectively eight and four specimens of C. laciniatum 
and hence must be counted as against the effectiveness of the 
treatment. 
