154 



PHYSIOLOGY OF THE INVERTEBRATA. 



the first from X 6i 8 to X 593, the second from X 576 to X SS4.5." 

 On adding ammonium sulphide, the spectrum Fig. 30, 6 is 

 produced. The first of these bands extends from X 625 to 

 X 596.5 (?), but this, and also the secondhand, says MacMunn, 



g 



h 



Oxychloro- 

 cruorin. 



The same 

 + NH4HS. 



Do. + NaHO. 



Aq. sol. + 

 NaHO, then 

 NH4HS. 



Blood of Ser- 

 pula, living 

 animal. 



Blood of 

 another 

 Serpula. 



Do. from a 

 dilated part of 

 blood-vessel. 



Do. from same 

 part, a third 

 specimen. 



Do. from same 

 part, a fourth 

 specimen. 

 ■ Aqueous solu- 

 tion of blood 

 of Serpula. 



Do. other 

 specimens. 



Do. H- NaHO, 

 then NH4HS, 



Gills of Serpula. 



Operculum of 

 Serpula. 



Fig. 30. — Spectra of the Blood of Sabella and Serpula. 

 (^After C. A. MacMunn.) 



"were very faint." After the addition of sodium hydroxide, 

 to this solution, a dark band is seen covering D, "which 

 recalls to mind the band of alkaline haematin (Fig. 30, c), and 

 this band extends from X 595 to X 576." 



