26 LOLIGINIDA. 
Lonio.us, Steenstrup, 1856. 
Distr.—3 species ; Gulf of California, Indian Ocean. L. affinis, 
Steenst. (xxv, 30). 
Body rather long, with posterior round fins united behind ; 
siphon not attached to the head. Fourth left arm hectocotylized 
in its entire length. Gladius feather-like, broad. Otherwise as 
in Loligo. 
Loligo hemiptera, L. brevipinna, and other Loligines with 
blunt extremity and round fins, may perhaps belong to this small 
group, which is not widely separated by its characters from 
Loligo. 
SEPIOTEUTHIS, Blainy., 1824. 
Syn.—Chondrosepia, Leuck, 1826. 
Distr.—14 species; West Indies, Cape, Red Sea, Java, Aus- 
tralia, Mediterranean, Madagascar, Sandwich Islands. S. Steno- 
dactyla, Grant (xxv, 24). 8S. lunulata, Fer. Orb. (xxv, 25). 
Body rather long or oval, with small lateral fins extending its 
entire length; siphon attached to the head by muscular bands ; 
buecal skin with seven projections covered with suckers; a strong 
wrinkle behind the eyes. Fourth left arm hectocotylized at its 
extremity. Otherwise like Loligo. 
Treutuopsis, Deslongchamps, 1835. 
Etym.— Teuthis, a calamary, and opsis, like. 
Distr.—A few species known, fossil in the lias of France and 
Wurtemberg. 7. Bunnellii, Desl. (xxviii, 55, 56). 
Pen or gladius dilated and spatulate behind, its wings curved 
towards the ventral side somewhat spoon-like. 
LeproreuTuis, Meyer, 1834. 
Etym.—Leptos, thin, and teuthis, a calamary. 
Disir.—L. gigas, Meyer (xxviii, 57). Oxford clay, Solenhofen. 
Shaft of the pen enlarging from a point to a broad blade in 
front, with long, lateral wings starting from the posterior pointed 
end. 
BELEMNOSEPIA, Agassiz, 1836. 
Syn.—Belopeltis, V oltz; Geoteuthis, Munst., 1843; Loligosepia, 
Queenst., 1839; Paleeosepia, Theodori, 1844. ; 
Distr.—9 sp. Fossil, in the Upper Lias of Wurtemburg, 
Calvados and Lyme Regis. AB. lata, Munst. (xxviii, 63). 
Gladius like Leptoteuthis and perhaps not separable from it. 
The shaft is more triangular, and the lateral wings broader, with 
more rounded outlines. 
Besides the pens of this calamary, the ink-bag, mantle and 
bases of the arms, as well as the horny shells, are preserved. 
Some of the ink-bags are nearly a foot in length,and are invested 
