Polyzoa of Queen Charlotte Islands. 35 



generally very slightly raised above the surface of the zoarium. 

 The rows vary in length and occasionally extend to the centre 

 of the branch ; but usually the condition is as I have de- 

 scribed it. The zooecia composing them increase in height 

 from within outwards, and the tallest form a conspicuous line 

 along the margin of the branch. The branches are for the 

 most part broad and compressed, and inosculation takes place 

 freely. A peculiarity which at once arrests attention is the 

 large development of dorsal appendages for the purpose of 

 attachment : these are short, cylindrical, calcareous processes, 

 which are given off in great number from the under surface 

 of the branches, and become firmly soldered to the body on 

 which the polyzoon grows (PI. IX. fig. 5«). 



I have great pleasure in naming this form, which is a very 

 characteristic member of the Polyzoan fauna of the Queen 

 Charlotte Islands, after Dr. G. M. Dawson. 



Tuhuliporafasciculifera^ n. sp. (PI. IX. fig. 6.) 



Zoarium flat, thin, closely adnate, flabellate. Zooecia free 

 and erect above, depressed Ipelow, the free extremities dis- 

 posed in short, disconnected, more or less divergent series, which 

 range in radiate fashion (but somewhat irregularly) towards 

 the margin, the series sometimes composed of a single line of 

 connate tubes, sometimes of two lines placed side by side, 

 sometimes of clusters (or fascicles) of tubes ; orifice orbicular, 

 unarmed ; surface thickly speckled. Oonocyst an inflation of 

 the zoarium, usually placed near the margin, involving a num- 

 ber of the zooecial tubes ; surface covered with minute disks 

 closely packed together. 



On shell. 



The fasciculate arrangement of the zocecia is the most dis- 

 tinctive character of the present species, but many single lines 

 of cells mingle with the composite series. It grows in flabel- 

 late patches, which sometimes give off long linear or subclavate 

 lobes. The free portion of the cell is much elevated and more 

 than suberect. 



So far as the character and arrangement of the zooecial 

 series are concerned, the Cretaceous Midtifascigera Gampi- 

 cheana, D'Orbigny, curiously resembles the present form (see 

 Paldont. Fran9. vol. v.. Atlas, pi. 762. fig. 8). 



DiASTOPORA (part.), Lamouroux. 



Diastopora patina^ Lamarck. 

 Cumshewa, on Tubulipora and Myriozoum. 

 [North and Arctic Seas, South Labrador, Britain, France 

 (S.W.), Adriatic] 



