154 



PHYSIOLOGY OF THE INVERTEBRATA. 



the first from X 6l8 to X 593, the second from X 576 to X 554.5." 

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

 produced. The first of these bands extends from X625 to 

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



d 



B c n 



Eb V 



G 



Oxychloro- 



cruorin. 



The same 

 + N'H4Hy. 



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- 



lion of blood 



of Serpula. 

 Do. other 



specimens. 



Do. -I- NaHO, 



then NH4HS. 



Gills of Serpula. 



Operculum of 

 Serpula. 



Fig. 30. — Spixtk.v of thk Bi.oon ok Sabella and Skkpula. 

 (^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 ha3matin (Fig. 30, c), and 

 this band extends from X 595 to X 576." 



