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PALAEONTOLOGY OF NEW-YORK, 
racter, but in its solid state this feature can not often be observed. In the specimen described, 
it is impossible to decide whether the rays are spiniform or lamelliform ; and therefore it is 
still possible that it may have the character of Favistella, though its constricted growth pre¬ 
sents a different feature from any thing yet observed in that genus. 
Fig. 2 a. A fragment of a hemispheric mass, natural size. 
Fig. 2 b. A portion of the same enlarged, showing the constricted growth at intervals. 
Fig. 2 c. A transverse section of the same enlarged, showing the stellate character of the ends 
of the columns. 
The following figures are from small hemispheric forms, apparently of the same species as 
the preceding. 
In the operr cells there is a confused stellate structure visible, but so minute that it is scarcely 
possible to decide more than that the rays appear to be spiniform, and like those in the pre¬ 
ceding species. In the solid specimens of this form I have found no rays. Although having the 
character of growth and form of the Chcetetes before described, this is clearly distinct in the 
size of the cells and columns, and is probably identical with fig. 2 a - c. 
Fig. 3 a. A small hemispheric form of this species. 
Fig. 3 b. The base of the same, showing its mode of growth upon the valve of an Atrypa. 
Fig. 3 c. Profile view, showing the form and elevation. 
Fig. 3 d. The base of a larger specimen, which commenced its growth upon a small shell. 
Fig. 3 e. A portion of the surface enlarged, showing the form and apparent stellate character of 
the cells. 
Position and locality. In the shale of the Niagara group at Lockport and elsewhere. 
(State Collection.) 
Genus FAVOSITES. 
When the introductory remarks to the corals of this group were printed, I had not detected 
in any specimens examined the unequivocal evidence of pores in the walls of the cells ; and in 
all but a single specimen of this family, I had found evidences of rays or lamellae. I have, 
however, been able to prove the existence of the genus at this period, though in New-York it 
holds a very subordinate place, so far as number of individuals or dimensions of the masses is 
concerned : indeed it would be almost overlooked among the great number, and more con¬ 
spicuous character, of the corals of the genera Astrocerium and Heliolites. On a farther 
examination of the specimens sent to me from Milwaukie by Mr. L'apham, I have found a 
species apparently identical with the one from Niagara; and likewise, in the same association, 
another species of very distinct character, so that we may regard the genus as being represented 
in two species at this epoch. It now becomes a matter of some interest to ascertain the cha¬ 
racteristic differences between this species, the one in the Pentamerus galcatus limestone, and 
the one in the Onondaga limestone, all of which approach in character the F. gothlandica , 
but which are, in their habit and mode of growth, distinct species. 
