PHYSIOLOGY OF THE INVERTEBRATA. 



131 



in Stokes' reduced liix3matia.'* .... Prof. Lankester could 

 not obtain derivatives of cblorocruorin, owing, as lie has 

 stated, to the apparent instability of this body, which 

 decomposes rapidly." 



Dr. MacMunn has recently examined spectroscopically the 

 behaviour of chlorocruorin with certain reagents, but his 

 investigations will be de- 

 scribed later in this chap- 

 ter, when we consider in 

 detail the chromatology of 

 the Invertebrate blood. 



The red blood of Lam- 

 hricHS can be made to 

 yield crystals of oxyhae- 

 moglobin (Fig. 27), and 

 a solution of these crystals 

 gives an absorption spec- 

 trum (Fig. 28). 



Ha3moglobin is also pre- 

 sent in special COipuscles p,^ sj.-Crystals oi- Oxyh.kmoglobin 

 of the blood of (rlycera from Bloou of Lumbkicus. 



(one of the Folijchccta) ; 

 as well as in the vascular fluid of Neplidis and Hirudo. 



C J) a, B E h F 



It 



ilii||lll|llll|IMI 



UO 120 130 



llll|llll|llll|lll 



14 



ISO 



Fkj. 28. — Absoui'tiox Spkctrum of Oxyh.kmoglobin from 

 Blood of Lumbricus. 



appears that this particular colouring matter is spectro- 

 scopically identical with Vertebrate ha3moglobin. 



The Insecta. 



In a large number of insects the blood is colourless ; although 

 sometimes it is of a green, yellow, or red hue. This colour 



* Ha;mochromogen. 



