PLATE 66 



1. Argonauta argo americana Ball. Slightly contracted, p. 149, 

 la. The same, shell from in front, p. 149. 



lb. The same, from the side. p. 149. 



2. Abralla megaptera Verrill, one of the sessile arms. 



3. Cavolina hargeri Verrill. Dubious. 

 4,4a. Atlanta peronii Le Sueur, p. 91. 



5,5a. Heterodoris robusta Verrill and Emerton. p. 144. 



6. Geitodorls complanata Verrill and Emerton. p. 145. 



7. Koonsia obesa Verrill; distorted by alcohol, p. 144. 



8. Caecum cooperi Smith. Enlarged view of anterior end of' shell with animal 



extended, p. 103. 



