CONCHOLOGICAL WRITINGS. 89 
a Phryganea. Since they are all brittle, arenaceous or membrana- 
ceous. Yet the worm that forms it and dwellsin it, (as no mollusca 
form tubular shells) is unknown, and I was told none has ever been 
seen init. A singular idea was suggested to me by Prof. Green 
that it might be a fossil’s shell! Since it is found in a rich fossil 
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region; and has a stony appearance; but being found free, in the 
water or on the banks of the stream, and never imbedded in stones 
it can hardly be so. The subject must remain doubtful, until other 
consimilar Genera are found. Meantime I give a figure of it, and 
its description; whereby it appears to approximate to the Sabel- 
lites and other tubular annelides, perhaps also to my G. Potami- 
phus of the R. Ohio, published in 1819, whose worm I detected ; 
but its shell is arenaceous open at both ends and operculate before. 
My name of Psephides means gravelly tube. 
Psepuipes. Cylindrical tubular shell, open before, closed behind, 
opening round entire, inside smooth hard stony, outside entirely 
formed by cemented gravel and little shells. 
Psephides paradoxa Raf. Uncial, diameter equal throughout, 
about one sixth of length and obtise, inside brown, outside versi- 
color.—Length less than one inch. The gravel of the outside is of 
all colors, formed by small angular fragments of shale, slate, clorite, 
quartz and other stones seldom found in Sherman Creek! and 
even entire fossil shells or fragments of fossils. 
C. S. RAFINESQUE. 
FossIts oF SHERMAN CREEK. 
I have discovered this year, this new locality for fossil remains, 
and collected about 50 sp. in a tract of 5 miles near the Kennedy 
Springs, in the Quaker hills and Mt. Pisgah forming a geological 
basin of red, yellow, brown and white sandstone, gravel or pebble 
stone and conglomerate, holding chert of all colors. The fossils are 
found in all, and even the chert or Petrosilex. They are of the 
oldest formation. 
I mean to give hereafter a full aecount of this fine oryctological 
region and all the fossils collected in it. I shall here merely indicate 
them. Most of them are new. 
Vegetable fossils. Fucites 2 Sp. 
Animal fossils. Porostomites 2 Sp. Encrinites 2 Sp. Turbino- 
lite 1 Sp. 
