MITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 143. NO. 2. PLATE 19 



1-1 B. STENOSCISMA HUECONIANUM; 2-2A. STENOSCISMA BIPLICATUM: 

 3-3A, STENOSCISMA MULTICOSTUM; 4, STENOSCISMA KALUM. 



(SEE: EXPLANATION OF PLATE AT END OF TEXT.) 



