NATURAL HISTORY SOCIETY OF GLASGOW. 355 



Carluke, fragments in the shale. Rather a rare species in most 

 of the localities. 



Synocladia (?) ScoTiCA, n. sp, 



Polyzoary erect, consisting of a main stem with rounded raised 

 keel, slightly tuberculated, and with secondary branchlets that 

 in the upper portion of the frond unite and become fenestrated. 

 Branchlets sub-alternate, five in one quarter inch on lower portion 

 of frond. On upper portion, where the branchlets unite, they 

 form irregularly shaped fenestrules. Cells on the main stem and 

 branchlets slightly oval, more than their own diameter apart, 

 with the margins slightly raised j one cell at the base of each 

 branchlet, and three between; twenty in one quarter inch. 

 Secondary cell pores small, about one fourth the diameter of 

 main cells; one, very rarely two, above and in line with each 

 main cell, and about its own diameter apart, the margins slightly 

 raised; there are also a few scattered small pores on the obverse 

 face. Both faces striated longitudinally. 



This species was first known to us from fragments found by 

 Dr Rankin in the Gillfoot limestone shale, Carluke. At that 

 time, as already stated, the fenestrated character of the frond 

 was not known, and we were inclined to place it with Glauconome 

 in our sub-genus Dijjiojjora, but since that time we have found a 

 small frond amongst some shale sent us by Mr John Smith, 

 Eglinton Iron Works, Kilwinning, from the Garple Burn, Muir- 

 kirkj which shows that while the polyzoary commences with a 

 central stem and secondary branchlets, as in Glauconome, yet 

 towards the upper portion of the frond these unite and form a 

 fenestrated frond like that seen in Synocladia carhonccricc, Etheridge, 

 jun. Our species differs from it, however, in the regular number 

 of cells between the branchlets on the main stems, in its distinctly 

 striated celluliferous and reverse faces, and in having the small 

 secondary cell pores more in line with the main cells. In 

 S. carbonaria these small cell pores are seldom in line with the 

 main cells, being sometimes below or above, sometimes on the 

 keel or dissepiments, or irregularly scattered about. 



Localities: Upper limestone shales, GiUfoot, Carluke; Garple 

 Burn, Muirkirk; in both localities it is very rare. 



