Plate 19. 
Page 
igure 1. Yoldia Umatilla Say. 31 
la. Yoldia ] limatula Say. 31 
lb. Yoldia limatula Say. 31 
2. Leda minuta Fabricius. 1^ 
2a. Lcda minuta Fabricius.--. 15 
3. Cuspidaria glacialis G. O. Sars. 98 
3a. Cuspidaria glacialis G. O. Sars. 98 
Sars type figures. 
4. Astartc fabula Reeve.107 
4a. Astartc fabula Reeve... 107 
5. Astartc globosa Holler.108 
5a. Astartc globosa Holler.-.108 
6. Lcda arctica Gray. 26 
6a. Lcda arctica Gray. 26 
7. Lcda pernula Muller . 19 
7a. Lcda pernula Hiiller. 19 
8. Cardium cilia turn Fabricius.142 
8a. Cardinal ciliatum Fabricius.142 
American Mus. Nat. Hist., New York, from type figures. 
