32 Mr. 11. Etlieridge on Carboniferous Polyzoa. 



by Prof. H. A. Nicliolson*, are the interstices so sharply zig- 

 zag, but more undulating ; the fenestrules also are a long 

 oval, and lack the characteristic hexagonal form of F. arctica. 

 It must, however, not be forgotten that these fenestrules are 

 described by Prof. M'Coy as " very obscurely hexagonal "f. 



Locality and Horizon. Currielee Quarry no. 2, Tyne 

 Water, Edinburghshire, impure limestone, 20 to 30 feet above 

 the no. 2 limestone of the Lower Carboniferous Limestone 

 group. 



Collector. Mr. James Bennie. 



Genus Glauconome (Goldfuss), Lonsdale, 1839. 



Glauconome, Goldf. (pars) Petrefecta Germanise, p. 217 {G. disticha); 



Lonsdale, 1839, Murchison's Silurian System, p. 677 ; M'Coy, 



1844, Synop. Garb. Foss. Ireland, p. 198. 

 Acanthocladia, King, 1849, Ann. Nat. Hist. 2nd ser. iii. p. 389 ; 



1850, Permian Foss. England, p. 47. 

 Penniretepora, D'Orb. 1849, Prod, de Pal. i. p. 45. 



Gen. char. Polyzoarium shrub-like or dendriform, with 

 non-anastomosing bilaterally symmetrical stems and branches, 

 all more or less in one plane ; celluliferous on one face only. 

 Main stem giving off occasional secondary stems, similar and 

 equal to itself. Branches varying in length, simple or bila- 

 terally branched, passing from the stems at a right angle or 

 an angle less than a right angle. Cell-apertures arranged on 

 the stems and branches in longitudinal series, the latter 

 usually separated from one another by a keel or dividing ridge 

 more or less developed according to species ; cell-mouths with 

 plain or elevated margins, sometimes radiately denticulated. 

 Celluliferous face sometimes ornamented with faint stride and 

 small nodes variously arranged on the longitudinal keels. 

 Reverse striated or otlierwise ornamented. 



Ohs. The term Glauconorne was first used by Miinster in 

 Goldfuss's fine work for four J species of cylindrical Polyzoa 

 having cell-apertures distributed on all sides of the polyzo- 

 arium, viz. G. marginata, G. rhomhifera^ G. tetragona^ and G. 

 hexago7ia, of which the first may be taken as the type. A 

 fifth species was subsequently added under the name of G. 

 disticha^. The date of publication of the ' Petrefacta Ger- 

 manise,' or, at any rate, of that part of it containing the de- ^ 

 scriptions and figures of the forms in question, is variously 



* Report Pal. Province of Ontario, 1874, i. p. 101. 



t Brit. Pal. Foss. p. 76. 



X Petrefacta German! je, p. 100, t. 36. 



§ lb. p. 217, t. (;5. f. 15. 



