368 WILMORE : THORNTON, MARTON AND BROUGHTON-IN-CRAVEN. 
These beds apparently belong to the same upper Dibuno- 
l^hyllum zone, and they are clearly succeeded by undoubted 
Pendleside beds in the district immediately to the north of the 
area covered by this paper. 
Notes on Some of the Corals. 
Syriiigopora ramulosa (Goldfuss). * The commonly 
occurring form is well represented by the figure in Edwards 
and Haime. 
It occurs abundantly in Thornton Golf Links. Rain Hall, 
Broughton Fields, and Nappa Road Quarries. Plate XLVI., 
Fig. 2, represents a specimen from Broughton Fields. Occa- 
sionally one may see the very ramulose loT^'er part, with its 
bifurcating tubes, passing up into a less ramulose form. In this 
upper part the tubes are much nearer and more regularly spaced. 
There are comparatively few bifurcations. vSome parts of it, 
except for the rarity of horizontal connecting tubes, might 
almost be classed as Syringopora geniculata. 
A small form is found in some of the quarries which is 
ramulose in its lower part, but has closely packed tubes of 
reticulate type in its upper part. This seems to be a distinct 
variety, and I propose, for the present, to speak of it as variety 
X. The tabulae, in the specimens I have examined, are farther 
apart than in the larger normal type. 
I have an interesting colony of a Syringopora from Clint's 
Dclf. The mass seems to originate from a " growing circle " 
3 inclies by 2| inches, and to spread out in a somewhat lob- 
sided manner into a mass 18 inches long, by 12 inches wide, by 
4 inches deep. In the lower part of the colony there is much 
bifurcating of the tubes, and the appearance is what may be 
called " sub-ramulose." In the higher part the tubes become 
roughly parallel and of geniculate type, bending towards each 
other at the points where the connecting tubes are placed. 
The tubes have a maximum diameter of, approximatelj^ 
^^See Vaugiian, Q.J.G.S., Vol. LXI., pp. 267-208^ 
