ME. A. W. WATERS ON MEMBEANIPOEID^. 663 



The tables of geographical distribution will seem incomplete, 

 Dut where there was reasonable ground for doubt or any uncer- 

 tainty the localities are omitted ; and with regard to nearly all 

 the older names it is impossible to know what was meant, and 

 these are dropped. Also, unfortunately, with many frequently 

 quoted and recently described species the same difficulty occurs. 

 Many fresh localities are added from my own collections and 

 from other opportunities of comparison. 



In making geographical divisions we have to be largely guided 

 by the consideration as to where the Bryozoa have been carefully 

 studied, and I have placed the British forms with Arctic and 

 Scandinavian forms under " Northern." Under " Australasian " 

 I place forms found in the neighbourhood of Australia and New 

 Zealand. In the Atlantic and Pacific column N. or S. indicates 

 that the species is found in the northern or southern hemi- 

 sphere. 



*^ means that at the base of the zooecium there are pore- 

 chambers. 



^np means no pore-chamber. 



(1) or (s) signifies one or several pores in the rosette-plates. 



47* 



