274 A. S. PACKARD, Jr., ON THE RECENT 



globular and nearly smooth. The upper valves are so thin that in dried specimens they 

 readily contract, and the lid and linear aperture are effaced, and the cell then appears as 

 if it possessed a large, broad, oval aperture, covered by a thin lid. A single branch con- 

 sisted m one example of eight rows of cells. A single isolated cell closely resembles a 

 cell of Flustra truncata, showing the near relationship of this genus to the Flustradaa But 

 one tuft of this interesting species occurred in fifty fathoms, associated with Beania admi- 

 randa, on a fragment of Pecien islandicus, Straits of Belle Isle. 



Flustra truncata Linn. 

 This species was taken frequently. 



F. membranacea Linn. 

 This species was found in abundance. 



Flustra digitata n. sp. [Plate VII., fig. 16.] 



Coencecium broad, rather thick, flexible, membranaceous, dividing into digitate portions 

 much as in Bugute Murrayam. Cells long and narrow, unarmed, well rounded in front' 

 Lid covering a curvilinear aperture opening very near the front edcre 



Its unarmed cells, well rounded in front, with the curvilinear aperture, will serve to dis- 

 tmguish it. 



Chateau Bay, thirty fathoms. Not uncommon. 



Bugula Murrayana Bosk. 



_ Abundant on the whole coast. Caribou Island, ten to fifty fathoms; Belles Amours, 

 eight fathoms; Strawberry Harbor, fourteen fathoms; Square Island, ten to thirty fathoms- 

 Domino Harbor, seven fathoms ; Hopedale, ten fathoms. 



Cellepora pumicosa Ellis. 



Found frequently on sertularians. 



Celleporaria surcularis Pack. 1. c. p. 410. 



Grows two or three inches high, branching clichotomously, the ends of the branches 

 somewhat truncated. Cylindrical, base two or three lines in thickness, surface rouo-h. 

 Cells crowded, of unequal size, erect, conical. Aperture small with a slight sinus. In the 

 young conica communities, the cells stand out more from the axis; apertures large, round, 

 with a slight, often obsolete, sinus. Surface of the cells coarse, irregular, and deeply 

 punctured, often arranged in irregular series running down the sides from the aperture 

 The terminal celllarge and conical. In old species the sinus is sometimes enlarged with 

 two denticles at its entrance. In section, the cells are irregularly oval, scattered thickly 

 over the axis and periphery. Abundant on stems and shells in company with Escharse 



DnStimpson has placed in my hand specimens belonging to this species, collected by 

 Dr. Hayes ,n Northern Greenland, and by McAndrew in Manseroe Sound, Finmark Euro- 

 pean authors have confounded this arctic species with C. cervicomis of the Mediterranean 

 hea, irom whence it was originally described by Pallas. 



