THE SCOLEX POLYMORPHUS 835 
Before I began using the gelatin capsules a single shark which 
had been in captivity a few days was given some oil of male 
fern diluted with ether. How much actually got into the stom- 
ach I do not know, as some was spilled in pouring the mixture 
down the tube which was thrust into the oesophagus. No calo- 
mel was given. Five days later when the specimen was examined 
there were small traces of the oil still in the intestine and no 
worms were found. 
TABLE 3 
20 sharks, captured July 4 to 7, kept without food 
; Se 
- 
DATE A oFeeeant | GGueE Aemauch | coman yore REMARKS 
| (Oke 
July 25, all sharks given 2 ec. each of oil of male fern 
erent e hee * i = onl ol RO 
JulyaZ Ose ee No. 1 Dead 9 scolices and | Decomposition 
bits of strobi-| not noticeable 
le, all dead | in intestine 
duly 265.5553. ¢ No. 2 Dying 2 dead Size of worms 
| not recorded 
Julya262 . eee No. 3 Dying /20 dead and © Size of worms 
| in the faeces | not recorded 
July s268 sen eee | No. 4 Dead _4 dead and in| Decomposition 
faeces of intestine 
| not noticeable 
July 26, the sixteen surviving sharks given 1 ec. each of calomel 
July ihe 2 No. 5 Dead No worms Decomposition 
just begun 
Julya2 See eee eee No. 6 Dead No worms 
JULY 283959 aoe No. 7 Dying No worms Mucous mem- 
brane normal 
dpily:3 seer ee No. 8 Killed | No worms Mucous mem- 
brane normal 
August 2, the twelve surviving sharks each fed on shark’s flesh 
— { | 7 = : > | 
AURUSU Tiere Aces No. 9 | Dead No data | Considerably 
| decomposed 
} 
JOURNAL OF MORPHOLOGY, VOL. 22, No. 3 
