1902.] Chemical and Physical Properties of Haemoglobin. 79 



written as below. The sign x is used to indicate fissile multiplication, 

 and + to indicate fusion, while merely indicates continuity. 



Exotospores 

 and spore residues 

 in cyst 



Spore mother cells 



Spore-cvst 



t 



Vermicule •< Embryo + 



cell 

 (zygote) 



Arnaebula 



Eree 

 Exotosporc 



Enhfemospores 

 I 



Eeinale ^Arnsebulse 



Egg-cell^ crescent I 



I 



Male 



Spermatozoa x ■< crescent' 



and sperm residual 

 sphere. 



I also give a list of the names here used with reference to the 

 occurrence of the forms indicated in man or in gnat and an indication 

 of the corresponding stages in a Gregarina and a Coccidium. In the 

 column belonging to coccidium I have employed the generalised 

 physiological nomenclature accepted by special students of the Spor- 

 ozoa (Schaudin, Liihe, &c.) 



The Croc-man Lecture. — " On Certain Chemical and Physical 

 Properties of Haemoglobin." By Arthur Gamgee, M.D. v 

 F.E.S., Emeritus Professor of Physiology in the Owens 

 College. Lecture delivered March 13, 1902, 



(Abstract.) 



This lecture consists of two parts, of which the first is bibliographical 

 and critical, the second experimental. 



Part I. — Bibliographical and Critical. 



The author commences by stating that a peculiar interest — the 

 parallel of that which in the plant organism belongs to chlorophyll — 

 attaches to haemoglobin, for, unlike any other chemical component of 

 the animal body, in virtue of its special chemical and physical attri- 

 butes, this remarkable substance may in the strictest sense be said to 

 possess a definite and unique physiological function. 



The author then discusses certain facts in reference to haemoglobin 

 and its products of decomposition which have a close bearing on his 

 researches, or which possess special interest in the light of work which 



VOL. LXX. G 



