1898-1902. No. 8] BRYOZOA. 31 



July 8, 1901, Ren Bay. 



This species is distinguishable from the next one (B. hincksi) by 

 the circumstance that the proximal margin of the oral aperture is more 

 rounded, the aperture has not so marked a triangular shape as is the 

 case with hincksi. The most conspicuous difference, however, is that 

 plicata has a distinct median denticle that is absent in hincksi (cf. figs. 

 49 and 51). The frontal wall has no ornamentation; but in the colo- 

 nies from Ren Bay, the same puncturing was found on the back of 

 the zocecia as is given by Smitt in fig. 190 (1. c). The length of the 

 zocEcia varied between 0.85 and 1.04 mm., their breadth between 0.4& 

 and 0.52 mm. 



The peristome rose on one side partly in the form of a tongue, and 

 beside the large median denticle, there was sometimes an indication of 

 a small denticle on each side. 



In the mandible of the avicularia (fig. 50), 1 ^ 2b. 



The specimens described by Smitt were from Spitsbergen. 



60. Bamphostornella hincksi, Nordgaard, nom.nov. 

 PL IV, fig. 51. 



1877. Cellepora plicata, Hincks, Polyzoa from Iceland and Labrador. Ann. Mag. 

 Nae. Hist., ser. 4 vol. 19, p. 106, pi. 11, figs. 3 & 4. 



Aug. 4, 1900, Sjopolse Ness, on Escharopsis sarsi; Aug. 8, 1900, 

 the winter haven, on Escharopsis sarsi; Sept. 19, 1900, off Forvisnings 

 Valley, 2-20 fath.; July 8, 1901, Ren Bay; Aug. 16, 1901, Gaase 

 Fjord, about 7 fath. 



In the above-named work, Hincks has described and figured a form 

 which I suppose is so different from the typical Eh. plicata, Smitt, 

 that it ought to be separated as a species of its own. Hincks's descrip- 

 tion is as follows: 



„In this species the cells are ovate, somewhat depressed; surface 

 smooth and glistening, sometimes traversed by ribs radiating from the 

 circumference; mouth subtriangular, slightly arched above the sides runn- 

 ing to a point in front so as to form an acute angle; peristome thin 

 and slightly raised at the sides; on one side a prominent mucro bearing 

 a large elongate-oval avicularium with rounded mandible, looking obli- 

 quely sideways. Ooecium semicircular, punctured in front." 



This description fits well the specimens that occurred among those 

 from the 2nd Fram Expedition. The zooecia were fairly large, the 

 length being 0.85 mm., and the breadth about 0.39 mm. The ornamen- 

 tation of the frontal wall is not particularly marked, but yet there are 



