66 
CATALOGUE OF CEPHALOPODA. 
Omm. Munsterii H Orb. Paleont. univ. t. 24. f. 3. 1845, Moll . 
Viv, et Fos. i. 417. 
Fos. Lithographic slate, Solenhoffen. 
Intermediate between Ommastrephes and Geoteuthis . 
h. Eyes covered with the Skin. 
Fam. V. LQLIGIDiE. 
Body subcylindrical, oblong, rounded behind. Fins on the sides of 
the hinder part of the back. 
Head subcylindrical. Eye without eyelid, covered by the skin, 
simple above. Buccal membrane distinct, often furnished with 
cups. Ears with a transverse ridge. 
Sessile arms with two rows of cups. Bings not convex externally, 
and provided with a narrow prominent edge on the middle of 
their width. Tentacular arms only partly contractile into the 
subocular cavity. 
Siphuncle attached to the head by a double superior medial band. 
Shell internal, horny, lanceolate, pennate or spathulate, without 
any air cells. 
Loligidse Gray , Proc . Zool. Soc. 1847, 285. 
Loligidae (pars) H Orb. Moll. Viv. et Fos. i. 318. 
Teuthidse 11. (pars) Owen , Trans. Zool. Soc. ii. 1836. 
A. Head separate from the Body . Mantle free all round. Shell 
pennate. 
a. Shell as long as Back. Fin posterior, dorsal , rhombic. 
1. Gonatus. Cups of sessile arms in four rows. Tentacular 
arms with many rows of small cups, and a single hooked cup 
at the base. Shell pennate, edges thin. 
2. Loligo. Cups of sessile arms in two rows ; lateral membranes 
with cups on angles. Shell pennate, edge thin. 
3. Teuthis. Cups of sessile arms in two rows ; lateral membranes 
without cups. Shell pennate, edges thin. 
b. Shell as long as Back. Fin occupying the Sides of the Body. 
4. Sepioteuthis. Shell pennate, broad ; edge sometimes thick- 
ened. 
