U. S'. Exploring Expedition,. 
MSTMMAIF»S»S Flo 
Drawn by J- D. Dccrut ■ 
Zich- of Socrojiy & Major, flf'Eultoiv St If -Pi 
Fig . ia,i, Spirifer duodecicostatus 2 S._? a,b,c, S . vespertilio 4, S. -phalaena 5 a ,t , Siphonotreta ? 6 a,b, Lingula ovata„ 
7 a,b,c,d, Productus fragilis. _ 8 ;P. bractiylheerus . _ 9,Solecurlu.s elliplicus . 10 , S.plandatus najb, Pholadomya imdata.is,E glendonensis . 
