TUBULIPORA. 273 



(Laminaria saccharina] dredged in Lamlash Bay. It was 

 long known to us under the name of T. orbiculus. 

 ** Base elongated or incrassated. 



3. TUBULIPORA PENICILLATA, R. Q. Couch. 



Hab. On shells and stones from deep water, common; 

 from the Eddystone Lighthouse to the Deadman Point, 

 E. Q. Couch. 



Mr. Couch describes it as calcareous, and about a quarter 

 of an inch in height. The upper part is expanded into a 

 flat head, having on its superior surface one or two rows 

 of projecting tubes round the circumference ; the centre is 

 either plain or marked with a few irregular cells. The cells 

 are distant from each other, with slightly oblique unarmed 

 apertures. The under surface of the head is furrowed, 

 without cells, and sloped into the footstalk." (See Dr. 

 Johnston's plate xlviii. fig. 1, 2.) 



4. TUBULIPORA TRUNCATA, Jameson. 



Hab. Shetland Islands, Jameson; in deep water, Zet- 

 land, Dr. Fleming; Zetland, Prof. E. Forbes; Rev. T. 

 Hincks, Salcombe, on shells. 



The head is stellate ; the top is convex, orbiculated, fur- 

 rowed with shallow grooves, which run towards the flattish 

 summit. It has been compared to a little Echinus without 



T 



