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429 
Rehder is greatly appreciated. Special thanks 
are due Dr. Grace Pickford, Bingham Ocean- 
ographic Laboratory, Yale University, and Mr. 
Clifford Fiscus for critical review of the manu- 
script. 
METHODS AND MATERIALS 
All the specimens agreed with Berry’s de- 
scription of Opisthoteuthis calif orniana, but no 
comparison was made with species types. Speci- 
mens were compared with representatives of 
two closely related species, 0. depressa and 
Stawoteuthis albatrossi . 
The majority of specimens reported in this 
paper were taken along a trackline running 
southwest from the Columbia River mouth. On 
this trackline standard stations were established 
at depths ranging from 50 to 1050 fathoms 
(91-1920 m). These stations were monitored 
four times a year, principally with a 400-mesh 
Eastern otter trawl, a 43 -ft Gulf of Mexico 
shrimp trawl, and a 70-ft semi-balloon shrimp 
trawl. The latter two trawls were used when 
trawling at depths greater than 450 fathoms 
(823 m). Vessels used to survey the trackline 
were the M/V "Commando,” a 65-ft purse- 
seine type vessel chartered from the College of 
Fisheries, University of Washington; and the 
M/V "John No Cobb,” the Bureau’s 93 -ft ex- 
ploratory fishing vessel. 
Observations on 39 flapjack devilfish col- 
lected in the northeast Pacific are reported in 
this paper (Table 1). Of this total, 31 speci- 
mens were taken on the Columbia River track- 
line by the M/V "Commando” and "John N. 
Cobb,” two off the coast of Washington by the 
"Cobb,” and six in the Gulf of Alaska by the 
"Cobb” and chartered vessels of the Interna- 
tional Pacific Halibut Commission. All speci- 
mens were captured with the 400-mesh otter 
trawl, with the exception of one taken on the 
Washington coast in a large pelagic trawl 
rigged to fish just off-bottom. None of the 
sampling gear used was a closing net. There- 
fore, although all of these captures, with one 
exception, are treated as occurring on the bot- 
tom, the possibility exists that they could have 
been taken as the gear was being set or hauled 
back. 
