.158 
GEOLOGY OF THE FOURTH DISTRICT. 
1. Favosites alveolaris* This specimen lias a honeycomb structure ; the transverse septa 
are interrupted. There are no pores visible, but from its analogy to others which are evi¬ 
dently of this species, there remains no doubt of identity. 
1 a. A specimen with larger columns, presenting the pores upon the angles. 
Localities —Williamsville, Erie county ; Le Roy, Genesee county ; and Caledonia, Living¬ 
ston county. 
2. Favosites Gotlilandica. — A mass of solid columns, showing the pores upon the sides of 
the tubes. 
2 a. A single tube magnified twice, and presenting a double row of pores upon the side. 
2 b. A fragment from a honeycomb specimen, showing the transverse lamellae. 
Specimens from the mass from which these are figured, present the characters noticed by 
Mr. Lonsdale, of having a single and a double row of pores upon the same specimen, and 
upon the same column. 
This is an exceedingly abundant coral, sometimes appearing with its tubes filled with cal¬ 
careous matter as in fig. 2; and again with the cells in their original condition, presenting the 
appearance of honeycomb, by which name this and some other species are known. It is 
known to range from the Niagara to the Hamilton group inclusive, occurring in great perfec¬ 
tion in nearly every rock. 
Locality of specimen figured —Williamsville, Erie county. Found in the same rock at 
Caledonia, Le Roy, and numerous other places. 
3. Fragment of a crinoidal column. — This is an abundant and characteristic fossil of this 
rock. Its great size and general smoothness, with the very thin plates of which it is com¬ 
posed, are sufficient to distinguish it. 
3 a, shows the crenulated edges of the plates. 
3 b, presents an appearance common on the surface of weathered slabs of this rock, where 
the column has been broken down, and the plates have slidden over each other, still remaining 
in contact. 
This form seems referable to fig. 9, pi. 18, Silurian Researches. Fragments of these co¬ 
lumns a foot or more in length are sometimes found, and there are others where the columns 
are composed of alternating larger and smaller plates. 
Locality of specimens figured —Williamsville, Erie county. Found also at Caledonia, Le 
Roy and numerous other places. 
* For synonymes and references of the genus Fayosites, see Silurian Researches, pp. 681, 682 and 683 ; also Goldfcss, 
Petrefacta, Genus Calamopora. 
