MOLLUSCA — HETEROPODA. 
121 
Sepia qficinalis ; S. rupellaria (?) ; Loligo sagittata, var. (?) ; L. 
siibulata, two varieties (?) ; L. media, and a variety (?) ; L. Eblance ; 
Eledone ventricosa ; Octopus vulgaris ; Sepiola Rondeletii ; Rossia 
Owenii and R. Jacobii; Spirula australis. He considers the two 
Rossia to be new. R. Owenii has large acetabula placed on long pedicles 
in three rows, those of the centre row being not more than half the 
diameter of those on each side ; on the first pair of arms the acetabula 
are more numerous, more equal in size, and smaller than on the others. 
R. Jacobii has smaller acetabula, and arms proportionably shorter. 
Peters has given, in Muller’s Archives, 1842, p. 329, some contribu- 
tions to the anatomy of the Sepiola; they refer to the ink-organ and 
parts of generation. The author esteems, as of doubtful value, the 
differences between the species of this genus hitherto described, since 
the smaller breadth of the cuticular flap which unites the mantle and 
head, as well as the presence of an under eyelid, can furnish no specific 
character, for the former varies very much, and an under eyelid is pre- 
sent in all the Sepiolce, 
Owen has received from Captain Belcher a specimen of Nautilus 
pompilius, with the shell, from Amboyna. The position of the animal 
in the shell agrees exactly with the description which Owen had formerly 
given of it in his Memoir on the Pearly Nautilus. The spire of the 
shell is covered by the dorsal fold of the mantle, and is lodged in the 
concavity at the back of the muscular plate above the head. The in- 
fundibulum rests upon the outer wall of the large chamber containing 
the animal. (Proc. Zool. Soc. 1842, p. 143.) 
PTEROPODA. 
Cantraine mentions, in tlie Bulletins de Bruxelles, ix. 2, 
p. 340, that Odontostoma rugulosum is Dentalimn trachea, 
Montagu, and calls it, accordingly, Odontostoma trachea. 
Odontostoma Icevissimum, id. ib. ; testa cylindrica, arcuata, vitrea, 
laevissima, inferne oblique truncata, subpapillosa, clausa : Golf von Ca- 
gliari. 
Moller, 1. c. p. 4, gives a new Limacina; L. balea, testa turrita, 
anfr. 7 ; spira prominente, apice acuto, 
HETEROPODA. 
Milne Edwards has now published his Observations, made 
along with Peters, on the Organization of the Carinaria 
165 
