336 A. E. Vei'rill — North American Cephalopods. 
K . — Specimens examined. Eggs and recently hatched yovng of Loligo Pealei. 
Locality. 
Near New Haven 
Vineyard Sound 
Long Island Sound 
Fisher’s Sound 
Nantucket Sound 
Vineyard Sound 
Vineyard Sound 
Vineyard Sound 
Near New Haven 
Off New Haven 
Gardiner’s Bay 
Off Newport, R. I. 
Off Newport, R. L 
Off Newport, R. I. 
Narragansett Bay 
Narragansett Bay 
' Fath. 
When 
collected. 
Received from 
Shore 
June 
19, 
1871 
J. 
E. 
Todd 
5-10 
July, 
Aug. ’7 1 
U 
s 
Fish Com. 
4-8 
August, 
1874 
U 
s. 
Fish Com. 
Surf’ee 
July 
28, 
1874 
u. 
s. 
Fish Com. 
8-12 
July 
26, 
1874 
u. 
s. 
Fish Com. 
8-16 
Aug. 
5, 
1875 
u. 
s 
Fish Com. 
5-10 
July, 
Aug. ’75 
u. 
s. 
Fish Com. 
Sept. 
6, 
1875 
u. 
s. 
Fish Com. 
Shore 
June 
11, 
1880 
s. 
I. 
Smith 
Aug. 
3. 
1880 
J. 
F. 
Fowle 
June 
28, 
1880 
Sch. 
G. H. Bradley 
8 
Aug. 
6, 
1880 
U. 
s. 
Fish Com. 
22-26 
Aug. 
7, 
1880 
U. 
s. 
Fish Com. 
44 
Aug. 
16, 
1880 
TJ. 
s 
Fish Com. 
6 
Aug. 
23, 
1880 
U. 
s. 
Fish Com. 
| 124 
Aug. 
31, 
1880 IT. 
s. 
Fish Com. 
Eggs or Embryos. 
Well developed. 
All stages. 
Well developed. 
Just hatched. 
Partly developed. 
Partly developed. 
All stages. 
New-laid. 
Near hatching. 
Half developed. 
New-laid. 
Fresh and well developed. 
New-laid and hatching. 
New-laid and partly dev. 
Fresh-laid. 
Partly developed. 
In the Gulf of Mexico, this species appears to he replaced by 
another species (Loligo Gahi D’Orbigny). Of this we have several 
specimens, collected on the west coast of Florida, at Egmont Key, 
near Tampa Bay, by Col. E. Jewett and Mr. W. T. Coons. This 
species is closely allied to L. Pealei, but has a more slender form, 
with the caudal fin shorter and narrower in proportion to the length 
of the mantle. The pen has a shorter and broader shaft and a nar- 
rower and more oblong blade, which has parallel, thickened and darker 
colored portions between the midrib and margins. The tentacular 
suckers have their horny rings more coarsely and equally toothed, 
there being only a partial alternation of larger and smaller teeth. 
Along our southern coast, from Delaware Bay to Florida, a much 
shorter and relatively stouter species ( Loligo brevis Bv.) occurs, which 
might be mistaken, by a careless observer, for the present species. In 
addition to its shorter body, it has very different large tentacular 
suckers, with the teeth on the horny rim coarser and all of similar 
form and size. Its pen is also shorter and relatively bi-oader, and 
different in structure. 
Notes on the Visceral Anatomy. • 
Plate XL, figures l-3a. Plate XLI, figure 1, ? . 
The gills (g) are large and highly organized in this species, 
although considerably smaller than in Ommastrephes. The bases of 
the gills are situated somewhat in advance of the middle of the mantle- 
cavity, and their tips, in fresh specimens, extend forward nearly to 
the base of the siphon (/). The branchial chamber, behind the heart, 
