No. 200.] 
117 
AVICULA. 
Avicula iuherculata. — Shell with distant tuberculated ribs and inter- 
mediate striee; posterior wing very large. Length, 2 inches. Loca- 
lity j town of Madison, Madison county. 
Lima. 
L. macropiera. — Shell convex; surface with obsolete radiating strias; 
one wing dilated, the other small. Length, about 3 J inches. Loca- 
lity^ Cazenovia, Madison county. 
MONOTIS. 
Mmotis princeps. — Shell convex, depressed; ear small, emarginate; 
radiating strias, numerous; rugose, profound. Length, about 3 inches. 
Locality, Cazenovia. 
Orthoceras. 
Orihoceras constrictum. — Shell smooth, tapering gradually, with a 
few remote transverse furrows. Locality, town of Madison, Madison 
county. 
GONIATITES. 
Goniatites punctatus, — Shell compressed; surface covered with mi- 
nute elevated punctse; septa with a single rounded lobe on the disk, 
angulated at the periphery. Length, II inches. Locality, near Sher- 
burn, Chenango county. 
Cyrtoceras. 
Cyrtocerus maximum. — Shell inflated, volutions few, increasing ra- 
pidly in size; transversely ovate; septa very convex. Length, 11 
inches; greatest width 5 inches; diameter 4 inches. 
Second Group. 
Left AN A. 
1. Leptcma punctulifera. — Shell with the upper valve deeply concave; 
radiating striae very numerous, prominent, angulated, each with a 
series of very regular small elevated punctae. Length, 2 inches. Lo- 
cality, Helderberg mountain. 
2. Leptana indenta. — Shell with radiating striae; intervening spaces 
waved or indented. Length, I inch. Locality, same as the preceding. 
