1916.] A. 1. Massy: Cephalopoda oj the Indian Museum. 241 
Specimen number fs .. M 282 M 28290 M 2821 
End of body to dorsal mantle-margin... 40 35 2: 
Mantle-margin fork between dorsal arms 12 13 g 
Breadth of mantle 12 10 10 
7" across fins 30 25 15 
Length of fin 22 20 Il 
ist right arm 20 20 14 
eTiGy wae 25 21 18 
Bal no 22 20 17 
Athy 5) 22 22 et 
Tentacle 45 35 28 
Club 10 9 5 
Distribution.—Andaman Sea, 188-320 fathoms. 
Type.—In Indian Museum, Calcutta, three specimens, male 
and female. 
Family BATHYTEUTHIDAE. 
Bathyteuthis abyssicola, Hoyle. 
Bathyteuthis abysstcola, Hoyle, Narr. Chall. Exfp., |, p. 272, fig. 108 
(1885); ‘ Challenger’ Rep., XVI (Cephalopoda), pp. 168-169, pl. 29, figs. 1-7 
(1886) ; Pfeffer, Syzopszs Oegopsid. Ceph., pp. 172-3 (1900); Hoyle, Bull. Mus. 
Comp. Zool., XLIII, no. 1, p. 33, pl. 1, fig. 2 (1904); Zrazs. Royal Soc. Ldin., 
XLVIII, part II, no. 14, pp. 282-283 (1912); 4enthoteuthis megalops, Verrill, 
Trans. Connect. Acad., Third Catalogue (Cephalopoda), p. 4o1, pl. 44, fig. 1 
(1885); Chun, Valdivia Exp., (Oegopsida) p. 185, pls. 24-27 (1910); Pfeffer, 
Plankton Exp., (Oegopsida) pp. 325-331, pl. 40, figs. 12-16 (1912). 
M £1388 ‘Investigator’ station 393 : 21-x-1911, Bay of Bengal, 7° 21' 6” N., 
85° 7/15" E., 2000 fathoms—One. 
M *+8° ‘Investigator’ station 462@: 20-iv-1912, Bay of Bengal, 9° 8’ N., 
87° 25’ E., 475 fathoms—One. 
In specimen M **%* the suckers of the ventral arms are in 
two rows throughout, aud on the other arms they are proximally 
in two rows and distally in three or four irregular rows. The 
rings of the arm suckers have five to six teeth. 
The tentacles are very long which is perhaps due to the 
specimen having been preserved in formalin. The suckers of the 
club begin proximally by a single sucker, followed by three in a 
row, and gradually increasing to about six in arow. A few rings 
of the club suckers appear to have about four blunt rather widely 
separated teeth on the distal margin and the rest of the ring 
smooth. Their position on the ring, and their blunt ends, seems 
to point to their being teeth and not papillae. Other rings seemed 
to be smooth. Hoyle describes the tentacular rings to be smooth, 
and Verrill does not mention their condition which would seem 
to imply that he had not observed any teeth. 
The horny rings of both tentacular and arm suckers are 
very dark. The luminous organs of the arms are about °50 mm. 
in length. The chromatophores are darkest on the dorsal surface 
of the head. Specimen M ****, from the great depth of 2000 
fathoms, is very young, and the mantle is much crumpled and 
denuded of its epidermis. The luminous organs at the base of 
the arms are clearly perceptible. The arm suckers are in two 
tows, and their largest rings show four to five teeth. The ten- 
