38 PERMIAN FOSSILS. 
The Russian Coral which Mr. Lonsdale has identified with Fenestella retiformis 
appears to be a distinct species, that is, if the cellules on its branches are really tri- 
serially arranged, and the connecting processes “occasionally cellular;’ as I have 
never yet found any British specimens displaying a tendency to become so far modified. 
Several specimens which I collected at Konitz differ in no respect from a variety, 
occurring at Humbleton, with frequently dividing branches, and the cellules rather 
wider apart than usual. Quenstedt appears to have been the first to identify the 
British Coral with Schlotheim’s Keratophytes retiformis.’ 
This species is rather abundant in the Magnesian Limestone at Humbleton Quarry, 
Ryhope Field-house Farm, Dalton-le-Dale, and Hylton North-Farm ; it occurs sparingly 
at Tunstall Hill and Castle Eden Dene. Mr. Hogg probably alluded to this species, 
when noticing the occurrence in the last locality of a ‘‘coralloid resembling Gorgonia 
flabellum.” At Tynemouth I procured a small specimen imbedded in the Breccia. 
Professor Sedgwick records a specimen which he found “in the beds of Blue Limestone 
at Nosterfield, near Tanfield.”” It occurs at several localities in Germany. The first 
published specimen, which is noticed by Schlotheim in the ‘'Taschenbuch,’ p. 55, was 
found in the Kupferschiefer of Schmerbach. The other German localities, as recorded 
by Von Dechen, Geinitz, Goldfuss, and Schlotheim, are Altenburg, Konitz, Liebenstein, 
and Gliicksbrunn, in the Zechstein-Dolomite ; Corbusen and Milbitz in the Lower 
Zechstein. 
Genus Synocladia, King, 1849. 
ReErepora (VIRGULACEA), Phillips. 
GORGONIA (DUBIA = VIRGULACEA), Morris. 
FENESTELLA (VIRGULACEA), Lonsdale. 
Diagnosis.—* A foliaceous or frondiferous infundibuliform Fenestellidia. Fronds 
consisting of numerous connected stems or ribs. Stems bifurcating; radiating from a 
small root ; running parallel to, and at a short distance from each other, on one plane ; 
and giving off bilaterally numerous short, simple branches, of which opposite pairs 
conjoin midway between the stems arcuately or at an ascending angle. Branches 
occasionally modified into stems. Ce//ules on the inner or upper surface of the fronds ; 
on both stems and branches ; imbricated ; and distributed in longitudinal series. Serves 
of cellules separated from each other by a dividing ridge.”* (?) Gemmulvferous vesicles 
on the dividing ridges. 
Type, Retepora virgulacea, Phillips. 
Synocladia differs from all other Fenestellidias in the character of the branches or 
1 Wiegmann’s Archiv, 1835, p. 91. 
? Trans. Geol. Soc. London, 2d series, vol. ili, p. 120. 
’ Vide Annals and Magazine of Natural History, 2d series, vol. iii, pp. 388, 389. 
