GEOLOGY OF THE FOURTH DISTRICT. 
ORGANIC REMAINS OF THE NIAGARA GROUP. 
No. 17. — No. 41, page 111. 
Fig. 1 and 2. Caryocrinus ornatus, Say (Jour. Acad. Nat. Sci. vol. 4, p. 289). Lockport. 
Fig. 3. Cyathocrinites pyriformis, (Silurian Researches, p. 672, pi. 17, f. 6. Ichthyocrinus 
Icevis, Conrad Jour. Acad. Nat. Sci. vol. 8, p. 279, pi. 15, f. 16.) 
No. 18.—No. 41 (read 41 bis), page 113. 
Fig. 1 . Hypanthocrinites ccelatus, H. Ijockport. 
Fig. 2. Hypanthocrinites decorus. (Silurian Researches, p. 672, pi. 17, f. 3.) Lockport. 
Broken off at the base of the arms. 
T ig. 3. Hypanthocrinites decorus. Lockport. 
Fig. 4 and 5. Marsupiocrinites? dactyius, H. Lockport. 
