CEPHALOPODA. 1G9 



Pen broad, pointed boHnd ; sliaft broad, truncated in front ; 

 lateral wings shorter tliaii the shaft. 



Fossil, 9 species. Upper Lias, Wurtemberg ; Calvados ; 

 Ljnne Eegis. Several undescribed species in the Oxford clay, 

 Chippenham. 



Besides thepe/is of this calamary, the ink-hag, the muscular 

 mantle, and the bases of the arms, are preserved in the Oxford 

 clay. Some of the ink-bags found in the Lias are nearly a foot 

 in length, and are invested with a brilliant nacreous layer ; th@ 

 ink forms excellent sepia. It is difficult to understand how 

 these were preserved, as the recent calamariea " spill their ink" 

 on the slightest alarm. (Buckland.) This genus may probably 

 tui'n out to belong to the Belemnitidso. 



Leptotetjthis, Meyer. 



Etymology, Leptos, thin, and teuthis. 

 Type, L. gigas, Meyer, Oxford clay, Solenhofen. 

 Pen very broad and rounded in front, pointed behind ; with 

 obscure diverging ribs. 



Ceaj^-chia, Leach, 1817. 



iVamecZ in honour of Mr. J. Cranch, naturalist to the Congo 

 expedition. 



Synonym, Owenia, Prosch. 



Type, C. scabra. Leach. 



Body large, ventricoso ; fins small, terminal ; mantle supported 

 in front by a branchial septum. Length two inches. Head very 

 small. Eyes fixed. Buccal membrane large, 8-lobed. Arma 

 short, suckers in two rows. Tentacular clubs finned behind, 

 cujDS in four rows. Funnel valved. 



Pen long and narrow. 



Distribution, 3 species. West Afi'ica ; in the open sea. 



This genus makes the nearest approach to the octopods. 



Sepiola. (Eondelet) Leach, 1817. 



Example, S. atlantica (D'Orbigny). PL I., fig. 4. 



Body short, purse-like ; mantle supported by a broad cervical 

 band, and a ridge fitting a groove in the funnel. Fins dorsal, 

 rounded, contracted at the base. Suckers in two rows, or 

 crowded, on the arms, in four rows on the tentacles. Length 

 two to four inches. First left arm hectocotylised. 



Pen half as long as the back. S. Stenodactijla (sepioloidea, 

 D'Orbi^.y) has no pen. 



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