WHILE working through the cephalopod collections of the University of Miami Marine Laboratory I found a specimen which possessed an abnormal third left arm. The arm was divided into two branches. An unusual feature was the presence of a well-developed web between the two divisions as found uniting the bases of normal arms in this species. © 1960 Nature Publishing Group.
Kumpf, H. E. (1960). Arm abnormality in octopus. Nature. https://doi.org/10.1038/185334a0