84 first Annual Report 
months ago and now in press, the writer expressed the opinion that 
O. banksii would very likely be found to occur in the waters of our 
region, but so prompt a confirmation of the statement was scarcely 
to have been expected. 
From all other West American species excepting only the gigantic 
Moroteuthis of Alaska, O. banksivi is readily distinguishable by the 
double series of powerful hooks on the tentacle clubs as shown in the 
accompanying photograph (Figure 45). The curious ‘‘fixing appar- 
atus’’ at the base of the club (Figure 46) furnishes another con- 
spicuous character. This structure comprises a compact, rounded 
Figure 45 
Showing hooked tentacle clubs of Onychoteuthis banksii. 
group of suckers and pad-like organs so arranged that the suckers 
on one tentacle fit perfectly over the pads of its mate, securing a 
most powerful adhesion at a point where such support very greatly 
increases the prehensile power of the tentacles. The immense rhom- 
boid fins are also characteristic. 
So far as I have been able to determine from the literature the 
present individual is by far the largest specimen of the species which 
has happened to be placed on record. D’Orbigny* gives the total 
length of O. banksii as 310 mm., mantle length 130 mm.; of the 
identical O. angulatat as 400 mm.; mantle 180 mm. Tryon gives the 
*Moll, viv. et. foss., 1845, p. 387. 
;Voy, Amer. Merid., Moll., p 43, 1845. 
