85 
These when whole lie in a horizontal position and are so numer- 
ous that they are, in places, touching one another. 
If a goniatite is tilted, it is sure to be only a fragment, or a 
very small specimen. Those lying horizontally are usually whole 
on the lower side. The upper side is rarely preserved, probably 
having been worn away by the elements before the mud in which 
it was deposited hardened into stone. ‘The orthocerata are usu- 
ally whole; but because of the striae on the outside, the test gen- 
erally adheres to the matrix when the fossil is removed from the 
rock. 
The fossil fauna of the Agoniatite limestone is unique, being 
distinctly different, except in rare instances, from ‘the forms 
found imbedded in the rock both below and above. A very few of 
the forms appear higher in the Hamilton shales. While fossils 
are numerous, species are comparatively few. In twenty years 
of effort, I have obtained about twenty from rock in place. I 
have at the present time eighteen species: Cephalopoda, nine; 
gasteropoda, three; branchiopoda, one; pteropoda, one; pisces, 
one; lamellibranchiata, two; plantae, one; crustacea, none. 
The fish remains are too meagre to indicate anything except 
that they were large. 
The single pteropod, Colcolus acicula, is described by Hall 
in Vol. 5, Natural History of New York, page 187. 
Brachipoda are represented by one species, Leiorhynchus 
limitare, the Orthis limitaris of Vanuxem, Vol. 4, page 356. Let- 
orhynchus lumtare is usually found inside of the shell of an ago- 
niatites or an orthoceras, sometimes as many as one hundred in 
a single shell. ‘Fhis is probably due to a gentle movement of the 
water in which the little creatures lived. Lamellibranchiata are 
rare. I have found but two: Lunulicardium curtum, Hall, Vol. 
5, and Panenka ventricosa, Hall, Vol. 5, page 417. 
Gasteropoda are represented by Loxonema delphicola, com- 
mon in the higher Hamilton shales, Hall, Vol. 5, page 47; Euom- 
phalus planodiscus, Hall, Vol. 5, page 57, and a new species de- 
scribed and named by Dr. John M. Clarke in museum bulletin 
No. 49, page 127 as follows: 
“ Macrochilina onondagaensis, sp. nov. Shell rotund with 
