122 FLUSTRID.E. 



I have followed Gray and Smitt in substituting Pallas's 

 name for that of Linnaeus. The publication of the 12th 

 edition of the ' Systema/ in which the present form first 

 received the name truncata, commenced in 1 766, the date 

 of the appearance of the t Elenchus ; ' but the work was 

 not completed till 1768, and it is in the volume bearing 

 date 1767 that the name occurs. Pallas, therefore, has 

 undoubted precedence ; and it becomes a pleasant duty 

 to associate this fine species with the name of one of 

 the most sagacious and accurate of observers. 



FLUSTRA BARLEEI, Busk. 

 Plate V. figs. 6-8. 



FLUSTRA BARLEEI, Busk, Quart. Journ. Micr. Sc. viii. (1860), 123, pi. \\v. 

 fig. 4. 



Zoarium foliaceous, thin and brittle, light-coloured, divided, 

 the segments above terminating in short rounded lobes. 

 Zocecia oblong, very large, with a simple margin. 

 Avicularia scattered, placed obliquely, with a semi- 

 circular mandible. Ooecia globose and rather shallow. 



Height of fine specimens about 2 inches. 



HABITAT. In moderately deep water. 



LOCALITIES. Shetland (Barlee) : " very local, between 

 Whalsey and Balta, and off Unst, in about 50 fathoms " 

 (A. M. N.). 



GEOGRAPHICAL DISTRIBUTION. Entrance to the Bommel- 

 Fjordj in 106 fathoms (Kirchenpauer). 



This species is distinguished by its very large, rectan- 

 gular cells, with an unarmed margin, by the oblique 

 position of the avicularia, and by its habit of growth. It 



