22 E. 8. Morse—Classification of Mollusca 
This latter group, combining the permanent inversion of the 
sac-walls with the lopho ophoric arms, is the first approach to the 
been 
a tendency to tarmanate as in the 
found on the outer bend of the intestine and actually on the 
ventral side; the nerve occupying its homological position. 
(The manner in which I view the Brachiopoda, if true, w 
entirely reverse the accepted poles of their structure. Ww 
een considered as.dorsal, is here regarded as ventral, ont 
what has been considered as anterior is here regarded as posterio or. 
closed, we have no function pels Ko at that end, except the 
degradational one of adhesion. In the or go es I, T) 
we have, through continued cephalization, the mo h thrown to 
the bottom of the sac, or nearer the anterior end, aad now the 
anus terminates behind the mouth, and posterior! 
The heart has also followed the intestine in its rotation and 
in Polyzoa. e have commencing in this group, the Tunicata, 
that erratic bendivig’ of intestine, and varied position in its anal 
termination, that is witnessed = up in the scale, and though | 
‘aca a? tie Open vabeek aa eatin as the police cove: de 
i in no inst ere the arms extended.” W: s Treatise, 
~ 
