478 MOLLUSCA. 
inches; upper lateral, twenty-four inches; lower lateral, about twenty 
inches; lower pair, twenty-one inches. 
Obtained at the Sandwich Islands at Oahu, and Maui. 
No other described species approaches to this in form and coloration, 
except O. macropus, Risso. ‘The comparative length of the arms is 
different (1, 2,3, 4), the body is more elongated, and there are no 
cirrhi about the eyes in the latter species, besides a sufficiently well- 
marked distinctness of coloration. Described from specimens pre- 
served in spirits, and from a coloured drawing. 
Figures 590, 590a, two views of the animal. 
Octopus PusILLUS (Gould). 
Corpus parvum, subglobosum: caput @que longum ace latum: oculi 
magni, protrust; apertura parva: brachiw robusti, contortt, cito 
attenuats ; pro longitudine 1, 2, 3,4; acetabulis magnis, confertis : 
umbella ampla. 
Sac small, subglobose; abdominal aperture small, occupying about 
one-third of the circumference. Head as wide as the body, with a 
slight constriction between them; orbits large and prominent; arms 
stout, abont two inches in length, thick at the base, and rapidly 
tapering to the tip; proportional length 1, 2, 3, 4. Cupules crowded, 
and large, occupying the whole breadth of the arm, about fifty or sixty 
in number; outer lip simple; inner aperture large. Umbrella large, 
the membrane attached to one-third the length of the arms, which are 
contorted by its contraction. 
Whole length about three inches. 
Obtained at Mangsi Island, China Sea. 
This may be the young of some large species, like O. rugosus, but 
as in its present state it presents essential differences, it has been 
thought best to describe and delineate it, as one of the means for 

