REPORT ON THE TUNICATA. 



117 



Table showing the Distribution of the Families, Genera, and Species 

 throughout the great ocean basins. 



The chief conclusiou to be drawn from the preceding sets of lists is that the pelagic 

 Tunicata are very widely distributed ; in fact, some species, such as Salpa runcinata- 

 fusiformis and Salpa democratica-mucronata, have a world-wide distribution. 



With the exception of the rare Octacnemus, which is not in its hal^its a pelagic form, 

 there is apparently no genus restricted in its range to particular oceans. 



In the following table, the last illustrating the Geographical Distribution, the 



» "Knight Errant" Expedition. 



