ITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 134, NO. 12, PL. 1 
LINGULA, DERBYIA, PAECKELMANNIA. MEEKELLA, CHONETINELLA, RHIPIDOMELLA, 
CRURITHYRIS, CHONETES, AND LEPTODUS? 
(SEE EXPLANATION OF PLATES AT END OF TEXT) 
