PLATE XLVI. 



Fig. 



1. Pionosyllis prolifera, Krohn (?), from St. Andrews. Enlarged. 1 



2. Gastalia punctata, 0. F. Mull., from the deeper water off St. Andrews Bay. Enlarged. 



3. Gastalia fusca, Johnst., from the tidal water, St. Andrews. The tail is incomplete 



and the bristles are absent from a few feet on the left anteriorly. Enlarged. 



1 There is doubt in connection with this figure, the preparation of which has been lost. The 

 dorsal cirri showed no articulations in life. 



