12 AMERICAN MARINE CONCHOLOGY. 
1. O. sacirtatus, Lamarck. Fig. 7. 
(Loligo.) Mém. Soc. Hist. Nat., Paris, xiii. 1799. 
Loligo Wecebrosa, Lesueur, Journ. Philad. Acad., ii. 95, plate. 1821. 
Loligo harpago, Ferussac, Dict. Class. Hist. Nat., iii. 67. 1823. 
Loligo Brongniartiz, Blainy., Dict. Sc. Nat., xxvii. 142. 1828. 
Loligo piscatorum, La Pylaie, Ann. Sc. Nat., iv. 319. 1625. 
»Loligo Coindetit, Verany, Mem. Acad. Sc. Torino, t. 1, f. 4. 1887. 
Head large. Body elongate, cylindrical, opaque, fleshy, smooth 
above and below. Tentacular arms with eight rows of numerous 
small cups at the extremities. Shell narrow, elongate; lateral 
ribs largest ; apical cone large. 
This beautiful animal is occasionally seen on all parts of the 
shore of Massachusetts.’ But it is especially abundant about 
sandy shores, as at Cape Cod. At Provincetown I have seen them 
stranded upon the beach at low tide, in great multitudes. Their 
usual mode of swimming is by dilating their sack-shaped body 
and filling it with water. The body is then suddenly contracted 
and the water forcibly ejected, so as to propel them backwards 
with great rapidity. So swift and straight is their progress that 
they look like arrows shooting through the water. Whenever 
they strike the shore they commence pumping the water with in- 
creased violence, while every effort only tends to throw them still 
further upon the sand, until they are left high anddry. The body 
is beautifully spotted with colors, which seem to vary with the 
emotions of the animal. At one moment they are a vivid red, at 
the next a deep blue, violet, brown, or orange. They devour im- 
mense numbers of. small fish, and it is amusing to watch their 
movements and see how, at a distance of several feet, they will 
poise themselves, and in an instant, with the rapidity of lightning, 
the prey is seized in their long arms and instantaneously swal- 
lowed. They, in their turn, are devoured by the larger fishes, and 
are extensively used for bait in the cod-fishery. (Gould, Invert. 
Mass.) 
Atlantic Ocean from Newfoundland southwards ; Mediterranean. 
2.0. BartRAMI, Lesueur. Fig. 8. 
(Loligo.) Journ. Philad. Acad., ii. 90, t. 7. 1821. 
Loligo sagittatus, Blainy., Dict. Sc. Nat., xxvii. 140. 1823. 
Loligo vitreus, Rang, Mag! Zool. 71, t. 36. 1887. 
Ommastrephes cylindricus, Orb. Voy. Am, Merid., 54, t. 3, f. 3, 4. 
