2 ARGONAUTID&. 
P. cordiformis, Quoy, Voy. Astrolabe, ii., p. 27, t. 6, f- 2; Adams, 
Gen. Moll., pl. 1., f. 3; Chenu, f. 35. Body orbicular, tubercular, winged. 
Arms nearly equal in length, the lateral ones shortest. Reddish brown ; 
arms with pale blue lunules. 
FAMILY—ARGONAUTID:. 
Body of female covered with a thin shell; arms tapering, very 
unequal ; cups prominent, in two series. The two dorsal arms webbed 
at the extremity. 
Genus, ARGONAUTA—Linneus. 
Shell one-celled, thin, transparent. 
A. tuberculata, Shaw. <A. nodosa, Solander, M.S.S.; A. 
tuberculosa, Reeve, Conch Lcon., f. 1; Chenu, f. 45 ; A. oryzata, Meush. 
Shell compressed, sides with transverse plications, which are longitudi- 
nally tuberculiferous ; keels two, with compressed tubercules. White, 
brownish on the spire, where also the keel tubercules are blackish 
brown. Five or six inches across. 
North Island, sometimes as far south as Wellington. Indian Sea. 
South Pacific. Chili. Tasmania. South Australia. 
Animal.—Body oblong, rounded behind, smooth, spotted with 
violet: eyes large, prominent; siphuncie united to the base of the 
arms by a lateral membrane; arms tapering, except the dorsal pair, 
which are palmate at the end, these are the shortest, the next pair to 
them the longest, and the others graduated ; the lowest pair are keeled 
on the outside; membrane small, all the arms equally webbed ; cups 
large, less than there own diameter apart, in two rows, with a single 
row of rather smaller cups round the mouth. 
Chatham Islands. As the shell of this animal was not obtained, 
I refer it doubtfully to this species, as it differs from Dr. Gray’s 
description. 
ORDER—DECAPODA. 
Body oblong or cylindrical ; head smaller than the body ; eyes free 
in the orbit; arms ten,—eight sessile, two tentacula, elongated ; fins 
developed ; an internal shell, occupying the middle of the back. 
FAMILY—ONYCHOTEUTHID. 
Fins posterior, dorsal, angular ; eyes naked ; ears with a longitudinal 
crest ; shell horny, lanceolate. 
Genus, ONYCHOTEUTHIS — Lichtenstein. 
Fins terminal, broad, together rhomboidal ;_ sessile arms angular, 
cups in two alternating lines ; tentacular arms with a rounded group 
of small sessile cups, and two series of claw-like hooks on each club. 
Shell lanceolate, pennate, tip acute; end produced, narrow; sides 
dilated, thin, with a central longitudinal keel contracted at the end. 
