IODINE IN MARINE FLORA AND FAUNA 



SESSIONAL PAPER No. 39b 



Species Where Part Amount Iodine 



obtained examined taken found 



Schizothoerus Mudge I. Shell 0.501 



nuttalli 



Outside cuticle of 0.300 0.000893 

 foot 



61 



Per cent. 

 Iodine 

 



0.298 



0.1995 







(0.000009) 10.02) 

 



Inside muscle of 



foot 

 Heart and Kidney 0.0350 

 Gonads and . 500 



contents 

 Gills 0.2000 



A second analysis of the outer cuticle of the foot of Schizothoerus indicated 

 a result of the same order but was spoilt befoie completion. The figure given for 

 heart and kidney requires confimation. 











(8) Phylum Chordata. 



i. Sub-phylum Tunicata. 



Only a few specimens of one form were obtained (at Mudge Island, at low 

 tide), and these did not yield sufficient material for definite results except in the 

 case of the test. 



Species 

 Pyura haustor Test 



■ ii. Subphylum Vertebrata, class Pisces, sub-class Elasmobranchii, species 

 Squalv^ sucklii. 



The dog-fish was selected for examination, since I had already shown that 

 the thyioid contained a relatively large amount of iodine, and since only in elasmo- 

 branch fishes is the thyroid found encapsuled, so that its dissection in teleosts 

 is almost impossible without removing much adjacent tissue. The thyroid material 

 was obtained from 82 specimens of Squalus sucklii caught by local fishermen in 

 the course of one night. Sample 1 was a fair sample of the material obtained from 

 32 females, sample 2 from 34 females, sample 3 from 16 males, and sample 4 from 

 133 "pups" contained in the females. This last sample undoubtedly contained 

 a large amount of connective tissue, removed in order to be certain that the thyroid 



