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Page 30, the reference to the figures should be reversed, and numbered from 4 to 1. 
“31, line 34, for Placoids read Ganows. 
134, 8th line from the bottom, read Anomia argentaria. 
* 136, 9th line from the bottom, read Twrvitella. 
“144, dth line from the bottom, read Dicolyledonous, 
“146, 7th line, read Pectunculus. ° 
“ 153, 8th line, read papillatus, ; - 
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12th line, read gibba. 
22d line, read perixilis, 
23d line, read ancillaria. 
32d line, read Conus sauridens. 
“* 156, 9th line, read Gryphaa. 
“26th line, read nautilus, 
“€ 158, 9th line. read Nicoletti, 
“* 161, 9th line, read Buccinwm. 7 
_ “10th line from bottom, read incwmbens, 
Gth line from bottom, read conligua, 
13th line, read Crepidula. 
13th line, read papillatus. 
17th line, read atites. 
3d line from bottom, read Tvilina, 
“176, 7th line, read quadricostatus, 
“ 182, Sth line, read trilineala. 
“202, 15th line, read caudata. 
“205, 15th line, read mellita. eat. 
“* 205, in the foot note, first line, read “are not identical.” 
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IN INDEX. 
Read Ancyloceras, instead of ‘Anclyoceras. Read Goniopholis, instead of Gonipholis. 
‘*  Cherroptera, UL Cherroptera. “ Polyparia,, ge. Polypiria. _ 
“ Dibranchiata, Debranchiata. “ Ruminantia, “ Rumonantia, 
“ Dicotyledonous, “ —_ Dicotyldonous. bum f : x 
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