234 Records of the Indian Museum. (VoL. XII, 
curta, Pfeffer, and describes them as having arm rings quite 
wanting in teeth and yet not completely smooth. He expresses 
doubt as to whether the species should not be united with 
S. inermis, as the only difference rests on whether the arm rings 
are smooth or dentate. The type specimens of S. curta are two 
in number, and one is described as having a hectocotylized arm. 
The other is presumably a female, and if the description of the arm 
rings was taken from it, and not from the male, it would naturally 
seem to be a different species to S. imermis, which is figured by 
d’Orbigny as possessing sharp teeth on the upper edge of the ring. 
The exceptional advantage I have enjoyed in having such a large 
collection of both sexes of various sizes to examine has convinced 
me that both S. curta and S. ocellata, Pfeffer are the same species 
as S. imermis, and although S. ornata (Rang) has only been 
recorded from the west African region, I think it may eventually 
prove to be also this species, in which case Rang’s name would 
have the priority. The hectocotylus has been figured by Hoyle 
(1905, fig. 152). It affects the proximal part of the fourth left 
arm, extending over more than half its length in small specimens , 
and less than half the length in larger examples. The modified 
suckers are very minute and in four rows, each row having a pair 
of suckers placed close together at either side of the arm, those 
on the ventral border being larger and placed closer together. 
Transverse folds on the modified portion of the arm are very distinct 
in well preserved specimens. The tentacle stems are flattened on 
the inner surface. The club is very long and possesses a moderate 
fin and slight protective membrane, and a width at the centre of 
about twice that of the stem. 
The very numerous and minute club suckers are distributed 
in no particular order. Two much larger than the rest are placed 
at the tip of the club. The rings of the tentacular suckers possess 
blunt teeth on the distal margin, the remainder of the ring being 
smooth. The teeth are very little wider at the base than at the 
top and are generally separated by about the width of their base. 
The number varies according to the size of the specimen, and 
individual variation plays a part. Thus a male with mantle-length 
of 33 mm. possesses three to four teeth, and a female specimen 
with mantle-length of 30 mm. possesses three to six teeth. A 
male with mantle of 48 mm. possesses nine to eleven teeth, and a 
female of 52 mm. mantle-length has five to seven. Females with 
mantle-length of 61-79 mm. show nine to thirteen teeth. If one 
of the minute club suckers is placed on its side the papillae cause 
the ring to appear to be dentate all round. 
Two females from Puri Beach (M **4**) showed either no 
teeth, or a very feeble development of them on the rings of the 
only tentacle present, but in general appearance, funnel organ 
and shell, they agreed perfectly with other specimen of S. znermuis. 
Buccal membrane seven-angled and minus suckers. A large 
spermatic pad is developed in the female. Funnel organ: a A- 
shaped median pad and pear-shaped lateral pads, widest posteri- 

