290 Dr. G. J. Allman on the Organs of the Tunicata and thePolyzoa. 



TDNICATA. POLYZOA. 



Branchial sinus, . . . . - Lopliopliore. 



Membrane of respiratory sac, = Caliciform membrane. 



Languet, = Oral valve. 



Cloaca, = Space between tentacular crown 



and sheath. 



(Esophagus, = CEsophagus. 



Stomach, = Stomach. 



Intestine, = Intestine. 



Muscles of middle tunic, . = Parietal muscles. 

 Muscles of internal tunic 



(Salpa, DoUolum), . . = Sphincters of internal tunic. 



Ganglion, - Ganglion. 



Tentacula, ....-.. = 



Longitudinal respiratory bars, = 



Heart, = 



