CHAP. XXII.] 
MOLLUSCA, 
505 
Class. — CEPHALOPODA. 
Order I. — DIBRANCH I A TA. 
Family 1.- — ARGONAUTIDAE, “ Paper Nautilus.” (1 Genus, 
4 Species). 
Distribution. — Open seas of all warm regions. Two species 
fossil in Tertiary deposits. 
Family 2. — OCTOPODIDZE. “ Polypi.” (7 Genera, 60 
Species). 
Distribution. — Norway to New Zealand, all tropical and 
temperate seas and coasts. 
Family 3. — TEUTHIDiE. “Squids or Sea-pens.” (16 Genera, 
102 Species.) 
Distribution. — Universal, to Greenland ; 2 other genera are 
fossil, in the Lias and Oolite. 
Family 4. — SEPIADJL “Cuttle Fish.” (1 Genus, 30 Species). 
Distribution. — All seas : 4 other genera are fossil, in Eocene 
and Miocene deposits. 
Family 5.— SPIRULHLE. (1 Genus, 3 Species). 
Distribution. — A ll the warmer seas. 
