CELLEPORIDtE. 59 



4. Cellepora cespitosa {n. sp.) PI. IX, fig. 5. 



Polyzoario solido, tuberoso ; lobis brevibus, subconicis, obtiisis inacqualibiis, nunierosis. 

 Cellulis prorsus immersis, plcrumque rostratis, valdc irregularibus, sparse punctatis ; ostio 

 orbicular! infra sinuato ; cellularum interstitiis cancellatis. 



Polyzoarium massive, with numerous irregular, short, subconical eminences or 

 lobes ; cells wholly immersed, very irregular, surface sparsely punctured ; orifice 

 orbicular, with a sinus below ; usually a small rostrum in front of the orifice, often absent. 

 Numerous irregular intercellular rounded openings. 



Habitat.— G. Crag, Sutton, S. W. 



It is extremely difficult to find a cell sufficiently perfect to show the minute characters 

 of this Cellepore. But its peculiar aspect suffices for its identification. It approaches 

 nearest to C. compressa, but its growth is much smaller ; the short branches are 

 cyhndrical and rounded at the extremity, and the surface is less coarsely cellular. 



((5) Encrusting, adnate, massive. 

 5. C. EDAX {n. sp.) PI. IX, fig. 6 ; PI. XXII, fig. 3. 



Polyzoario massivo, crasso, mamillato, conchse parvae turbinatae formam gerente. Cellu- 

 lis ovatis, rhomboidalibus, erectis seu subdecumbentibus, umbonatis, superficie scabra, 

 puncturatu. Ostio supra arcuato, medium versus, constricto, utrinque denticulato, labio 

 inferior! recto. 



Polyzoarium forming a dense thick botryoidal mass having the form of a small turbinate 

 shell ; cells ovate, rhomboidal erect or subdecumbent, umbonate ; surface punctured, rough, 

 mouth rounded above, contracted below the middle, with a small denticle on each side, 

 and straight below. 



Habitat. — C. Crag, iS'. Wood, on a species of Natica and Turritella. {Recent) Coast of 

 Devonshire ; Bev. T. Hinclcs. 



This is a very peculiar and interesting form. The rather dense crust, which 

 has a botryoidal aspect, appears to have been in all cases formed by superimposed 

 layers of cells covering most usually small turbinate Natica-like shells in most instances 

 of the same species but in other cases a small Turritella. The specimens consequently 

 are all very much alike, resembling small thick univalve shells, with a comparatively 

 small circular mouth. But it is curious that it is extremely rare to find in these masses 

 any remains of the original shell. In by far the greater number of instances this 

 appears to have been entirely removed, the sides of the spiral canal being formed by 

 the backs of the polyzoan cells usually disposed in parallel rows, much as they are 

 on the concave surface of some Lunulites. When any remains of the original shell are 



