NATURAL HISTORY SOCIETY OF GLASGOW. 31 



description, which does not appear to have been noticed in the 

 Permian strata of either Germany or Russia. Since Prof. King 

 described this genus, one or two closely allied forms of Carboniferous 

 polyzoa have been referred to it by Mr. Robert Etheridge, jun., in 

 the Explanation to sheet 23 of the Geological Survey of Scotland, 

 p. 102. 1st, Synocladia biserialis of Swallow; 2nd, Sejrtopora 

 cestriensis of Prout, both American species, which are thought by 

 Mr. Meek to be identical ; and 3rd, a Scottish species, Synocladia 

 carbonaria, R. Etheridge, jun., which he believes to be so closely 

 related to the American form, as to be only a variety of it. In his 

 diagnosis of this species, Mr. Etheridge points out that the cell- 

 apertures are arranged in two alternating rows, both on the stems 

 and branches, instead of from three to five rows, as in King's Per- 

 mian species, and further, that supplementary cell-apertures are 

 scattered irregularly amongst the primary cell-apertures, either singly, 

 or grouped in twos and threes ; and that scattered over the surface 

 of the reverse face of the frond, are open wart-like projections. 

 These characters have not been noticed on S. virgidacea of King, 

 so that I am somewhat doubtful of the correct identification of the 

 Carboniferous forms with the Permian genus. 



In the Proceedings of this Society, vol. iii., p. 355, Dr. Young 

 and I briefly described another form from our Carboniferous lime- 

 stone shales under the name of Synocladia (?) Scotica ; querying the 

 reference to Synocladia as doubtful, preferring to leave it there in 

 the meantime, until there is an extended examination of the whole 

 group. In this species the cell-apertures are further apart than in 

 S. carbonaria, Etheridge, jun., and the small intermediate cells are 

 seen to be more regular, and more in line with the main cells than in 

 that species. I now bring under the notice of the Society another 

 species which I also doubtfully refer to Synocladia (?) the following 

 brief diagnosis pointing out some of its most distinguishing characters. 



Synocladia (?) fenestelliformis, sp. no v. A flattened foliaceous 

 polyzoarium, of a somewhat circular form, springing from a small 

 root-like base, from which proceed downwards, in some specimens, 

 non-poriferous roots similar in character to those observed in some 

 species of the Fenestella. Celluliferous face. Fenestrides somewhat 

 variable in size, twice as long as broad, quadrangular in form, 

 excepting at the bifurcation of the interstices, where they are tri- 

 angular. Interstices straight, carinated, bifurcating at intervals, of 

 the same thickness throughout the whole expansion of the frond, 



