Page:American Seashells (1954).djvu/587

Rh Aside from egg-size and egg-clusters and mantle-arm index, there is great difficulty in separating this species from O. bimaciiloides Pickford which lives nearby in shallower water where there is mud present. Octopus bimaciiloides Pickford Mud-flat Octopus Los i geles, California, to Lower California. Almost identical with O. bimacidatus Verrill. Eggs large, 9.5 to 17.5 mm. in length, with shorter stalks, attached in small clusters. Mantle-arm index 34, but ranging from 29 to 39. Fairly common in shallow water among rocks where mud is present. Adults are somewhat smaller than bimacidatus. W