ANATOMY OF PALUDBSTRINA 



171 



cavities in which the arteries terminate as ' interorganic 

 lacunae ', says (p. 100), ' the venous blood is collected into 

 an anterior or cephalopedal sinus ', &c. I share Professor 

 Pelseneer's view that the large cephalopedal cavity is venous. 

 The following outline, which is by no means complete and 

 owing to the size and contractility of the animal is not founded 



Text-fig. 5. 



Heart, pericardium, and kidney in section, a, auricle ; v, ventricle ; 

 k, kidney ; f, portal vein ; fc, pericardium. 



upon injections, may serve to enlarge our knowledge of this 

 system in the Taenioglossa. 



There appears to be a large general venous sinus of which 

 the chief components (cephalic, pedal, and visceral) are in 

 communication with each other. The two first-named are 

 in open communication posteriorly, but are separated anteriorly 

 by a horizontal septum. Both Henking and Bregenzer speak 

 as though the latter completely separated the two cavities in 

 P . u 1 V a e and B y t h i n e 1 1 a . In none of my series, however, 

 is this the case. 



NO. 261 pr 



