A. E. Verrill— Cephalopoda of North America. 293 
arms, 10°7. ‘The anterior dorsal lobe of the mantle-edge is larger 
and longer than usual, and the ‘pen,’ while having the general 
form of that of Z. Peale’, tapers more gradually anteriorly, and 
has a narrower, more tapered, more acute and stiffer ante- 
rior tip. But the most obvious peculiarity is the unusual 
smallness of the suckers, both of the tentacles and short arms, 
which are little more than half as large as those of typical LZ. 
Pealei of the same size. The largest of the median suckers of 
the tentacular club are only 2™" in diameter of aperture; the 
largest of those on the 8d pair of arms, 15™. The rims of 
the suckers are white, and their denticulation is similar to’ that 
of the typical form, but finer. 
[341], Pl. xx, figs. 101, 101a, 1873. Tryon, op. cit. p. 143, Pl. 52, figs. 141, 
This is closely allied to Z. Pealei, and may finally prove to be 
only a geographical variety of it, but among the very numerous 
Specimens, of both forms, that I have already examined, I have 
hot found intermediate ones. The principal differences are the 
larger and flatter median suckers of the tentacular clubs, which 
also have darker colored and more strongly denticulate rims; 
the larger suckers of the sessile arms; a stouter body in both 
sexes ; a larger and broader caudal fin, the ratio of the breadth 
of the fin to the mantle-length, in the larger specimens (with 
mantle 7 to 9 inches long), being from 1: 1°80 to 1:1-95, while 
in L. Pealei, of corresponding size, the ratio is 1 : 2°15 to 1: 2°80. 
This form has been received, hitherto, only from the western 
part of Long Island Sound, where it is abundant, with the 
schools of menhaden. 
Parasira catenulata Steenstrup. 
Octopus tuberculatus Risso(?), Hist. nat. de I’Eur. merid., iv, p. 3, 1826 (t. D’Orbig.) 
Octopus catenulatus Férussac, Poulpes, Pl. vi, bis, ter., 1828 (t. D’Orbig.) 
Philonexis tuberculatus Fér. and D’Orbig., Céph. Acét., p. 87, Pl. vi, bis, ter. 
“This is the same specimen that was referred to under Octopus granulatus, in 
this Journal, xvi, p. 210, 1878. The specimen had been mislaid, and at that time - 
Was not tobe found. It was recorded from memory, and only an impe 
‘nation of it had h ived 
Am. Jour, Sor.--Tarrp Series, VoL. XIX, No. 112.—ApriL, 1880, 
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