386 WILLIAM A. HILTON 
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Fig. 1 Section through the body of Phoronis below the tentacles and at the 
level of the central ganglion. The drawing is not completed on the right, but 
the whole extent of the nervous system is shown. %X 70. 
Fig. 2 Section across the body of Phoronis some distance below the level 
of figure 1. The long sense organ or left nerve trunk is shown on the left below. 
In this figure, as in the last, the basement membrane is indicated by a dark band. 
x 70. 
