218 MR. J. W. KIRKBY ON SOME FOSSILS FROM THE 
spines on each side of the umbone. With these points of 
difference before me, I do not feel warranted in identifying the 
present species with the C. Davidsoni, of Schauroth. And more 
especially as Mr. Davidson is of opinion that it shows strong 
points of resemblance to the Carboniferous form Chonetes Hard- 
rensis. Until we obtain examples in which the shell surface is 
preserved, it will scarcely be possible to determine the specific 
affinities of this Chonetes. 
8. Fenestella retiformis, Schloth. Denkschr. d. K. Ak. d. Wiss 
zu Munchen, p. 17. tab. 1, figs. 1 and 2. 
This species is only found in small fragments, and not very 
often. The interstices are delicate, and the meshes nearly 
quadrate, in-which respect it approaches the var. Gezniizi of the 
Unter Zechstein. 
9. Ichthyorachis anceps, Schloth, Petrefact, p. 341. 
Three or four examples of this Bryozoan have been found. 
They all resemble a variety that occurs in the Middle Limestone 
at Humbleton, in the imperfect development of the pinnules; 
but they differ both from that form, and every other of the 
species with which I am acquainted, in the regular bifurcation 
of the branches. 
10. Cyathocrinus ramosus, Schloth. Denkschr. d. K. Ak. d. Wiss 
zu Minchen, p. 20, tab. III., figs. 9-18, 15. 
The impression of a single internode is the only trace I have 
of this species. 
11. Serpulites anastomosis, sp. nov. 
Beside the preceding fossils, I have also found one some- 
what obscure in its relations, and apparently unknown. It may 
be described as a compressed tube, increasing gradually in width 
in one direction, and contracting in the other. The largest 
specimen is about one inch long, 43,ths. broad, and 34nd. in 
thickness. In section it is lenticular. In three specimens the 
tube is straight; ina fourth example it is curved. The surface 
