PLATE 66 



1, Argonauta argo amerlcana Dall. Slightly contracted, p. 149. 



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



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



8. Abralia megaptera Verrill, one of the sessile arms. 



3. Cavolina hargerl Verrill. Dubious. 



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



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



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



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



8. Caecum cooper! Smith. Enlarged view of anterior end of shell with animal 



extended, p. 103. 



