from Icthuiil and Labrador . 105 



Others it takes on sueh shapes as aie represented in Plate X. 

 figs. 11-14. 



[Aretie Sea {Smitt).'\ 



Genus Cellepoka, Fubricius. 



(Celieporaria, Smitt.) 

 19. Cellepora incrassata^ Lanik. 



This fine species, judging from the fragments which abounded 

 in the tiredging, must be common oft' the coast of Iceland, as 

 it is, according to Smitt, in the seas about Spitzbergcn and 

 Greenland. In Finmark it seems to be less abundant 

 East Greenland, plentiful (Gennan Polar Exped.). 



20. Cellepora ovata, Smitt. (PI. XI. fig. 5.) 



Two fragments occur. 



[Spitzbergcn, in 10-GO fathoms ; less common than C. 

 scah-a and C plicata {Smitt) ; Sabine Island (German Polar 

 Expedition).] 



In this species the mouth is orbicidar, instead of triangular 

 as in the allied C. plicata, Smitt, and the avicularium much 

 shorter than in that species. The mucro is set completely at 

 one side of the mouth. The surface of the cells, which arc very 

 convex and regularly ovate, is coarsely punctm*ed, the spaces 

 between the punctures rising at times into ridges. The peri- 

 stome is thin and not at all elevated. 



Smitt, as Kirchenpauer has already noticed, ranks this form 

 with his Cellejwra scahra in such a way that it is ditficidt to 

 determine whether he regards the two as specifically distinct 

 or not. From his description of the figures (p. 22G) I should 

 infer that he looks u])on these two forms and C. plicata as 

 merely varieties of one and the same specific type. Judging, 

 however, from those figures, as well as the Icelandic and 

 Labrador specimens, I have little hesitation in considering 

 C. ovata an independent species with well-marked features. 



Smitt, indeed (p. 18S), refers to certain intermediate 

 forms by which, he thinks, the distinction between C. ovata 

 find C. plicata is reduced to a very small matter — forms in 

 which the general appearance of C. ovata is combined with an 

 oviccll resembling tiiat of C. jdicata, though wanting its 

 punctured surface, and a mouth which often suggests the three- 

 cornered shape* so characteristic of the aperture in tiie last- 

 named species; but as he does not figui'c these forms it is difficult 



* I am afriiid this is a very free trauslation of tlie Swedish, " ocli 

 dervid ser djiirhusniynningarue afven hiir fa en antydan till trekant- 

 form ;" but 1 hope it does not misrepresent its real force. 



