1916.] A.L. Massy: Cephalopoda of the Indian Museum. 243 
blunt rather closely-set teeth on the distal margin, the rest of the 
ring being smooth. The tentacle stem is flattened and its inner 
surface is marked with a groove. At 16 mm. from the base of the 
club the connective apparatus, consisting of eight suckers and four 
papillae, commences. These suckers have a papillary area and 
smooth ring. Six or seven suckers are placed in a row on the 
proximal two-thirds of the club, about ten being larger than the 
rest ; the distal third has very small suckers, the last six rows con- 
taining only two apiece. Protective membranes are moderately 
developed, and there is a slight dorsal keel. The rings of the 
large tentacular suckers have twenty-two to twenty-five pointed 
teeth all round their circumference. Smaller suckers may have 
as many as thirty-six teeth. None of the suckers has accessory 
chitinous formations. 
Colour reddish-purple, fins paler and their ventral surface 
sprinkled with chromatophores on the part next the mantle. 
Pfeffer (/.c., p. 249) has shown that the genus Calliteuthis is 
defined by having smooth rings to arm and tentacle suckers, and 
that the latter are furnished with accessory chitinous formations 
which are wanting in the genus Stigmatoteuthis which has dentt- 
culate rings to arm and tentacle suckers. 
The principal measurements are as follows :— 
-End of body to dorsal mantle-margin Par rt SO 
Breadth of mantle a ne Ser reels 
Breadth across fins por Aa a abe = ae) 
ie of fin ane ae ie, 65c, 2G 
ist right arm ate re : weed 
-ANG? aaa 8 ae ay e Beane 
ei gol. eee es a3 “t ere CG 
AG Sore a5 sees se a ae geil 
Rentacle ei -3, ae a f eel 25 
Club it a = ree) 
Distribution,—Japan, 345 fathoms (Hoyle). One specimen. 
Family CHIROTEUTHIDAE. 
Chiroteuthis (Chirothauma) imperator, Chun. 
__ Chiroteuthis (Chirothauma) imperator, Chun, Valdivia Exp., (Oegop- 
sida) p. 241, pls. 38, 39, 40, 41, 42, 43, 44 (1910); Pfeffer, Plankton Exp, 
(Oegopsida) p. 581 (1912). 
M 125° ‘Investigator’ station 281: 20-iii-1g01, Bay of Bengal, 11° 15! 15” 
N., 8°7' E., 300 fathoms.—One 9. 
M 138° ‘Investigator’ station 297: 13-iv-1902, Gulf of Oman, 25° 11! 30” 
N., 57° 15' E., 700-689 fathoms.—One. 
M 5425 ‘Investigator’ station 366: 10-iv-1g06, Arabian Sea, 24° 45! N., 
63° 50’ 15” E., 544 fathoms.—One 9, and arms of another speci- 
men. 
1250 
The specimen M **2° resembles in colour Chun’s illustration 
(pl. 38, figs. 1 and 2). The ventral luminous organs measure about 



| Less tip. 
