144 



PHYSIOLOGY OF THE INVERTEBRATA. 



This substance (as is well known) forms an oxygenised 

 combination which is very unstable, and which is carried by 

 the blood across the tissues of the animal, and is there 

 dissociated, yielding its oxygen to the elements of those 

 tissues which require it. 



Prof. Ray Lankester discovered that in some Annelids the 

 haemoglobin is replaced by a green-colouring matter (chloro- 

 cruorin). 



Reverting once more to the saline matter contained in the 

 blood of the MoUmca, the author* obtained the following 

 results (i.e., percentages) : — 



Dr. L. Fredericqt found 3.016 per cent, of soluble and 

 insoluble salts in the blood of Octojnts milr/aris. 



The author of the present volume has submitted to 

 analysis the ashes of the blood of several Invertebrate 

 anim.als. The ashes were obtained by incinerating the blood, 

 partially covered in a platinum dish, at a very low tempera- 



* A paper read before the Royal Society of Edinburgh on June i, 1891. 

 t Bulletins de V Academic lioi/ale de Belf/ique, 2" serie, tome iv. 



