2 
CATALOGUE OF CEPHALOPODA. 
Cryptodibranchia or Brachiocepbala Blainv. 1814 ; Diet. Sci . Nat. 
xii. 88. 1818 ; Menke , Syn. 
Antliobranchiophora Gray , Land. Med. Rep. 1821. 
Mollia Eichwald . 
Cephadelia Cephalopodia Rafin. Anal . iVhtf. 138. 1815. 
Synopsis of Orders. 
Subclass I. Antepedia. — Body naked. Shell none, or internal. 
Head separate, with eight or ten fleshy arms furnished 
with cups. Gills two. Siphuncle entire. Foot none. 
Order I. Octopia. 
Arms eight ; Cups sessile, without any horny ring. Ho 
internal medial dorsal Shell. Eyes fixed in the skin. 
Order II. Sephinia. 
Arms ten, two longer; Cups peduncled, with a horny 
circle. Internal medial Shell. Eyes free in the orbit. 
Subclass II. Polarnaxia. — Body without fins, enclosed in the 
last chamber of a siphoned-chambered external shell. Head 
not separate from the body, with a great number of cylin- 
drical annulated retractile tentacles, without cups. Gills 
four. Siphuncle slit. Foot-like appendage distinct. 
Order III. Hautilia. 
Subclass I. Antepedia. 
Body naked. — Shell none, or internal. — Foot none. 
Head separate, with eight or ten fleshy arms furnished with cups. 
— Gills two. — Siphuncle entire. , ^ v 
Cephalopoda nuda Cuvier , Anat. Comp. 1800 ; Lamch. Ext. d. Cour. 
1812 ; Schwieger , Naturg. 1820. 
Cephalopoda (testa nulla) Lamch. Phil. Zool. i. 322. 1809. 
Cephalopoda libera De Haan , Mon . Amm. 1825. 
Cephalopoda cryptodibranchia D' Orb. Ann. Sci. Nat. vii. 96. 1826; 
Menke , Syn. 1 . 1828, ed. 2. 1 . 1830; Grant , Led. 1833. 
Mol. Cephalorum natantium Sepiadse Flem. Brit. Anim . 225. 
1828. 
Cephalopoda acetabulifera Ferus . D'Orb. Hist. d. Cephal. 1834 ; 
UOrb. Moll.. Viv. et Fos. i. 157. 1845. 
Cryptodibranchia nuda Blainv. 1814 ; Diet Sci . Nat. xii. 88. 
1818. 
Cryptodibranchiata Blainv. Did. Sci. Nat. xxxii. 172. 1824. 
Cephalopoda Leach , Zool. Misc. iii. 1817. 
