CEPHALOPODA. 479 
enabling others to settle the question. The surface is smooth and 
soft, and dries of a slaty hue. Described from specimens in spirit. 
Figure 591, the animal, natural size. 
Ocropus MoLLIs (Gould). 
Corpus parvum, elongatum: oculi valdé exstantes: sipho bulbosus, elon- 
gatus: brachii graciles, basi haud approximati pro longitudine 4, 3, 2, 
1; cupuls remotis: tunica (vino conservata) ochracea, rufo punctata, 
ramusculis venosis ad dorsum brachiorum notata. 
Animat about the same in size as the preceding species, but is much 
more delicate and slender. The arms, especially, are quite slender, 
and do not approach a contact with each other at their origin; so that 
there is a broad sheet of thin, delicate membrane between them, form- 
ing the umbrella. The siphonal tube is bulbous and long, truncate 
at tip; the eyes are very prominent; the proportionate length of the 
arms is 4, 3, 2, 1, just the reverse of the last species. The cupules 
are thirty or forty in number, not crowded, having their inner opening 
very small. The surface is quite smooth and delicate, of an ochreous 
ground colour, after immersion in spirits, thickly dotted with brown, 
and with delicate, branching, transparent venations or furrowings, run- 
ning up the back of the arms at their bases. 
Whole length about three inches. 
Obtained at Tutuilla, Samoa Islands. 
Like the preceding, this may be a young specimen, but evidently a 
different species. Its characters are most like those of O. Indicus. It 
is more delicate in all its characters than any other species I have 
seen. Described from specimens in spirits. 
Figure 592, the animal, natural size. 
SEPIOTEUTHIS ARCTIPINNIS (Gould). 
Corpus elongatum, ovato-lanceolatum, pinnis perangustis, arcuatis muni- 
