KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 23. N:o |2. 33 
In the first element of the siphuncle there is a duplicature as in the preceding species 
though not so prominent. 
Length 45 millim., dorso-ventral diam. 8 millim., minor diam. 6. A smaller, though 
adult specimen is 34 millim. in length, dorso-ventral diam. 6 millim., minor diam. 5 millim. 
14. Ascoceras gradatum n. 
Pl. IV fig. 8—12. 
A few specimens from the limestone of Hoburg. A doubtful specimen from the 
neighbouring Holms hallar in Wamlingbo. 
Shell laterally complanated, thick, ventral side convex, dorsal side straight, neck not 
much narrower than the rest. The surface of the shell is so much altered, that no orna- 
mentation can be discerned, only a few transverse lines on the neck. There are four sig- 
moid septa with wide curvature exteriorly. When cut longitudinally in a plane from the 
dorsal to the ventral side along the median axis, they show a peculiar steplike outline, 
not seen in other species. Their surface is marked by a serrated outline (fig. 10 a) no 
doubt occasioned by the peculiar wavy, imbricated lines, which are seen in so many Ce- 
phalopoda and have been formed by the mantle. They are of course here seen in pro- 
file. The siphuncle is wide and large, the first element is nummuloid and the duplica- 
ture is so large that it reaches from the ventral side to the centre of the siphunele. The 
septa are bent in a peculiar sinus on the ventral side near the siphuncle. 
Length 38 millim., dorso-ventral diam. 15, minor diam. 10 millim. 
Gen. Glossoceras Barr. 1865. 
There is nothing especially to be added to the generic characters as given by BAR- 
RANDE, if not the very remarkable increasing width of the sigmoidal part of the septa 
from below upwards, quite contrary to those of Ascoceras. (Compare pl. V fig:s 30—51 
with fig:s 3, 7, 11 of the same plate). It is, as has been dilated upon in the description 
of the Ascocerata (Asc. decipiens for inst.), almost impossible to distinguish certain species 
of Ascoceras from Glossoceras as to their nearly identical ornamentation. In behalf of 
the structure of the septa they are quite unlike and distinct. 
Glossoceras gracile BARRANDE. 
var. curta BARR. 
Pl. V fig: AL b9. 
Syn. 1867. . Gl. gracile, var. curta BARR. Syst. Sil. vol. II, pt. I, p. 373, pl. 96 fig. 35—45. 
» 1889. » A. FoorpD. OCatal. of the Foss. Cephal. of Brit. Museum. Pt. I p. 254. 
Distribution.  Sandarfve kulle, Linde klint and Mannagårda in Lye, in the upper- 
most limestone. 
K. Sv. Vet. Akad. Handl. Band 23. N:o 12. 5 
