REPORT ON THE POLYZOA. 
iii 
Distribution. 
1. Geographical. 
I have thought it convenient for the sake of uniformity, and to facilitate reference, 
to arrange the species enumerated in this second part of the Report into the following 
seven divisions of the ocean, in the same manner that the Cheilostomata were divided 
in the first part. 
A. North Atlantic Region, between the parallels of 70° W. and 20° E. 
B. South Atlantic Region, from 70° W. to 20° E. 
C. South Indian or Kerguelen Region, from 20° E. to 110° E. 
D. Australian Region, from 110° E. to 160° W. and S. 
E. Philippine or Japanese Region, from 110° E. to 160° W. and N. 
F. North Pacific Region, from 160° W. to the coast of North America. 
G. South Pacific Region, from 160° W. to 70° W.; but from this region no species 
belonging to any of the orders referred to in this part of the Report were 
procured. 
In the following List, to the names of the species procured at each Station a reference 
is added, by corresponding letters, to the other regions in which it was found, so that its 
geographical distribution may be seen at a glance. 
2. Bathymetrical. 
The Stations in each geographical region, in the List, are arranged in bathymetrical 
order, beginning with those of the greatest depth ; it will be seen that only two species 
of Cyclostomata occur at depths greater than 1000 fathoms, viz., one at 1600 and one 
at 1450, the former, however, also being found at various depths, from 50 fathoms 
downwards ; four or five others were found at 450 to 600 fathoms, but by far the larger 
number were procured at between 50 and 150 fathoms, and ten in shallow water. Of the 
Ctenostomata only three occurred at depths as great as 150 fathoms, the remaining 
eight having all come from depths less than 40 fathoms. The only two species belonging 
to the Pedicellinea group both came from 150 fathoms. 
3. Geological. 
To the sub-order Cyclostomata belong most of the oldest fossil Polyzoa that have 
been found up to this time, whilst “ as yet we have no clear evidence that Cheilo- 
