1888-89.] Mr Irvine & Dr Woodhead on Carbonate of Lime. 353 
TABLE II. 
Artificial Sea Waters. 
Ordinary 
Sea 
Water. 
No. 1. 
No. 2. 
No. 3. 
No. 4. 
Chloride of sodium, . 
Chloride of magnesium, 
Sulphate of magnesium, 
Bromide of magnesium, 
Sulphate of lime, 
Sulphate of potash, . 
Chloride of calcium, . 
27205 
•3794 
•1551 
•1276 
•1026 
2-4804 
'3320 
•1357 
•1116 
•0898 
*0903 
2*4804 
•3320 
•1357 
•0079 
•1116 
•0898 
•0903 
2-6996 
•3696 
•1491 
•1125 
•0964 
2-7254 
•3813 
•1660 
•0076 
•1262 
•0863 
3*4852 
3-2398 
3-2477 
3'4272 
3-4928 
Water, .... 
96*5148 
96-7620 
96-7523 
96-5728 
1 96-5072 
TABLE III. 
Analyses of “Ecdysed” Crab which had lived ten days after casting in No. 2 
Water, and of an ordinary Shore Crab to compare with it. Size across 
Carapace, 1^ inch. 
Ecdysed Crab. 
Shore Crab. 
Chitinous matter on exo-skeleton, . 
3-77 
10’76 grains. 
Carbonate of lime on exo-skeleton, . 
5"50* 
39-78 ,, 
Carbonate of lime of interior, including 
stomachical teeth, &c., 
0-25 
1-53 ,, 
Teeth (mandibles), .... 
0-041 
0-59 ,, 
Phosphate of lime on exo-skeleton, 
2-396 
4-48 „ 
Phosphate of lime of flesh, lymph, and 
total interior structure, 
0-18 
0-39 ,, 
Water, flesh, &c., . . about 
350-00 
350-00 „ 
* On a newly ecdysed crab there was no trace of lime-salt deposition, but 
in this example carbonate of lime had been deposited to some extent before 
the death of the animal. 
TABLE IV. — Edible Crab. 
Water, blood, salts, &c., . . . 6646 grains. 
Flesh (gave 14*56 of ash, containing 4'94-3Ca0,P0 5 ) 295 ,, 
Outer calcareous structure, .... 2956 ,, 
Inner calcareous structure, . . . . 103 ,, 
10,000 „ 
VOL. XVI. 31/10/89 
Z 
