430 TUBULIPORIDiE. 



number, rather widely divergent, and of considerable 

 length, and gradually dilate towards the top into a rounded 

 expansion. 



The basal lamina, by which the zoarium adheres, fre- 

 quently forms an edging round it. 



The largest specimen I have met with measured about 

 f inch across. 



Habitat. On stones and shells &c., from deep water. 



Localities. Off Sana Island (Hyndman) : coast of 

 Antrim, 22 fathoms (Swanston) : coast of Northumber- 

 land (W. King) : off the Mull of Galloway, 110-140 

 fathoms (E. Forbes) : Scotland, on Pinna (T. H.) : island 

 of Islay (Lady Emma Campbell) : Shetland, 80-140 

 fathoms (A. M. N.) . 



Geographical Distribution. Roscoff (Joliet) : Scan- 

 dinavian coasts, from great depths, on Gorgonia, Oculina, 

 &c. (Smitt). 



Range in Time. English Crag (Busk). 



Stomatopora Johnstoni, Heller. 



Plate LIX. fig. 1, and Plate LX. figs. 1, 1 a. 



CnisERPiA Johnstoni, Heller, Bryoz. Ad. M. 50. 



? Alecto granulata, Johnsi. B. Z. ed. 2, pi. xlix. fig. 2. 



Zoarium branched dichotomously, frequently white and 

 vitreous, thickly speckled ; branches slender, slightly 

 expanded above. Zocecia almost universally in series 

 of 1-2. Ocecia at the extremities of the branches 

 or at a bifurcation, dilated and very ventricose, wedge- 

 shaped. 



Var. a. [robusta) . Zoarium of somewhat stouter habit ; 

 branches broader, and rather more expanded at the 

 extremities. 



