104 
Proceedings of Royal Society of Edinburgh. [sess. 
Table V. Showing Composition of Ecdysed Crab compared with 
ordinary Shore Crab (Anderson). 
Analysis of “ Ecdysed ” Crab which had lived ten days after casting in No. 
2 Water, and of an ordinary Crab to compare with it. Size across the cara- 
pace, 1^ inches. 
- 
Ecdysed Crab. 
Shore Crab. 
Chitinous matter in exo-skeleton, 
3*77 
10*76 grains. 
Carbonate of lime in exo-skeleton, 
Carbonate of lime of interior, including 
stomachical teeth, &c., .... 
5*50* 
39-78 „ 
0'25 
1-53 „ 
Teeth (mandibles), ...... 
0-041 
0-59 „ 
Phosphate of lime in exo-skeleton, 
2-396 
4-48 „ 
Phosphate of lime of flesh, lymph, and total 
interior structure, ..... 
0-18 
0-39 „ 
Water, flesh, &c., 
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 YI. Showing Comparative Amount of Calcareous and Organic 
Matter in Edible Crab (Anderson). 
Percentage 
Composition. 
Water, blood, salts, &c., 66 - 46 
Flesh (gave 14"56 of ash, containing 4'94-3CaO,PO g ) . . . 2‘95 
Outer calcareous structure, 29 '56 
Inner calcareous structure, ....... 1 *03 
100*00 
Table VII. (p. 86). Showing Composition of Precipitate thrown out 
of Mixture of Sea Water and Urine after standing Seven Days 
at 70° F. (Anderson). 
Water and organic matter containing ammonia (7 *38 per cent.), . 31 *81 
Carbonate of lime, 4-85 
Phosphate of magnesia and ammonia, 51 '10 
Phosphate of lime, 12'24 
100-00 
