36 oi:<; LNB OF RE8PIB \TIO\, r/rc. 



ill contact \vitll the water ill Ilir chamber become- ~>ack-like Mild 



-landular. The pericardium :ind tin- sack> containing 1 



Mini ovaries, appear to' communicate \* ill) tin- |>MlIi:il cnvii y either 



through these chambers or directly. 



Tin- blood is a white Ihjiii i with M sliirlit tendency to liluisli. 

 Mild contains wMter s<) per cent 11111. Albumen '! per centum. Salts 



Mud substances incoagulable l>\ heat 7-f> per cent um. Kibrine.etc.. 



;" IMT centum. 



Valenciennes discovered in \Miitilus three pMirs of open'mus 



conncct.inij,- the lirMliehiMl s.-ick with livr eliMinltei's ; of which the 

 Mntei'ior Mini posterior pairs siiuatcd on the sides of the rectum 

 are eMch provided with M single opening; whilst- the lifth.M much 

 Larger chamber, has MII opening on eithei 1 side. It is srp.Mr:ilrd 

 Ity their WM!!S iVoni the other cliMinbers ; and from t he Mllereii 

 hranchiMl veins which diverse these w:dls, lamellar Mppend 

 |rojcct into the pMired chaml)ers. MIK! pMpilhite*! ones into the 

 siiio-lf larii'e eliMinlter. In the sniMller cliMinliers MIT usually found 

 concretions of phosphate of lime, without trace of uric acid. 



The ^'ills form a cylinder in Octopus and Sepia, and in Lnli^o 

 and other OTIHTM they MIT in the form of M luilf-cylinder : they 

 MIT two in number in the linked cephalopods, as well as those 

 po->sessino an internal shell; Mild four. MrrMii^ed M pair on each 

 side, in the Nautilus: hence the terms Dibranchiata and Tetra- 

 branchiata, forming the highest divisions of the class CejdiMl- 



opodM. The waiter finds access to the u'ills throim'h the lar-t- 

 opening Let ween the free anterior ventral iiiMrrin of the mantle 

 and the l)ody. and it is expelled from the funnel ly a muscular 

 contraction of the wall of the mantle. 



Tin- mantle is usually fastened dorsally Ity a muscular neck- 

 l)Miid or iiin-lnil liMiid. to the head of the animal, and this hand 

 may lie either narrow or l>road, or may even extend laterally 

 nearly around to t he siphon : hut usually t he vtnt I'M! niMririn of 

 the mantle, at least, is detached from tin- body : thede^i 

 attachment vario in the different genera. Within the mantle 

 opening are loiind the l>ranchi;e. t he anus, t he opening . >f t he 

 <_ r eneralive and urinal in^ organs, and of the ink-liMir- 



I rinary oiienin^s are found on each side </f the rectum. 'Die 

 urine N decidedly acid and limpid, and is tilled with myriads of 

 infusoria and a ureat (jiiantity of i<n^ of litl le ciy-taN 



