Review of the New York Geological Reports. 71 
the naked eye these appear like strize or fine vertical lamellz ; no 
possessed “lamellz contorted spirally around the axis.” la 
shows the disposition of the arched layers dipping concentrically 
into the axis of growth, and producing, as Schweigger has de- 
seribed, a pillar-like axis permeating the mass. 
Fig. 1a. Fig. 1. 
- 
Cystiphyllum cylindricum, fig. 1. p. 69, is considered identi- 
cal with a Species which occurs in England in the Wenlock form- 
ation. It isa remarkable coincidence, that, in both countries, it 
is encrusted with Aulopora tubiformis. ‘The latter coral is found 
in the west also at Button-mould Knob, near Louisville. 
