190 Bulletin, Vanderoili, Marine Museum, Vol. IV 



rnately 500 eggs, each of which is ovoid, with a long diameter of about 



1 mm. 



References: Argonauta argo Linne, Syst. Nat. Ed. X, Holmiae, p. 

 708, 1758.— Tryon, Man. Conch, vol. I, p. 138, pi. 49, fig. 10, 

 (color plate), 1879. — Naef, Adolf, Fauna E Flora del Golfo di 

 Napoli, vol. 35, Bd. I, p. 763, 788, text figs. 455-470, 1923 (full 

 description and synonymy). — Boone, Bull. Bingham Oceanog. 

 Coll., vol. II, art. 5, p. 3, pi. 2, 1928. 



Family: OCTOPODIDAE. 

 Genus: OCTOPUS Lamarck. 



Subgenus: Octopus. 

 Octopus bimaculatus Verrill. 



Plate 119. 



Type: Verrill founded the species on a series of animals collected 

 at San Diego, California, Panama, and on the coast of San Salvador, 

 which are deposited in the Peabody Museum, Yale University, and the 

 United States National Museum. The type is not designated but ap- 

 pears to be a large male from San Diego, California, and deposited in 

 the National Museum and a female from the same locality, deposited 

 in the Peabody Museum. 



Distribution : This is a reef-dwelling species found from San 

 Diego, California, to Panama. It lives under rocks and feeds chiefly at 

 night on small crabs, shrimp and mollusks, the broken fragments of 

 which make a heap outside its den. 



Material examined: One specimen, caught near Eden Island, 

 Indefatigable Island, Galapagos, by blasting, March 12, 1926. One 

 small specimen, taken in dragnet, Coiba Island, Panama, Pacific 

 Ocean, February, 1928. 



Life History: The eggs are encased in capsules, attached on a 

 mucus-like thread and fastened in some sheltered cranny but where 

 they will not be smothered by sedimentation. No study has been made 

 of the early stages of this species. The larger adults are uniformly 

 smaller than adults of the more common species, O. americanus, also 

 found on the West Coast. 



Color : When living, this species is highly endowed with the ability 

 to change its color. Adequate color notes of the living specimens are 



