268 
NAUTILOIDEA. 
RemarTcs. Some examples from the Eifel district which I have 
referred to this species are much compressed, so that the ellipticity 
of their sections is often enormously increased. This is especially 
the case in the older and wider part of the shell, the narrower por- 
tion presenting probably the normal shape. For example, in a 
specimen in which the dorso-ventral diameter measures 37 lines, the 
transverse measures 47. At the smaller end of this specimen, 
which probably represents its natural form, the ratio of the two 
diameters is as 18 : 21. Taking another example in which the ratio 
of the larger diameters is as 40 : 53 we find the smaller to he as 12 : 14. 
In another in which the shell is obviously very much crushed in its 
more expanded portion, the two diameters at the larger extremity 
are roughly as 36 : 60, while at the smaller end they are as 17 : 19. 
If a fragment from jSTewton, South Devon, in a very imperfect 
condition, hut showing the form of the section, can be referred to 
this species, which I think may be pretty safely done, it is the first 
example of C. lineatum recorded in this country. 
Steininger states that the siphuncle in his species is situated on 
the concave side of the shell, hut it is not seen in the figure, and it 
would seem that some other mark in the shell was mistaken for 
it, for Doemer mentions its situation as being quite close to the 
outer margin, adding that it is small, rounded, not headed, and con- 
tinuous. 
Horizon. Great Devon Limestone (S. Devon), Stringocephalen- 
Kalk (Eifel) ; Middle Devonian : Iberger-Kalk (North-western 
Hartz) ; Upper Devonian. 
Localities. British. Ivy-h ridge Quarry, near Newton, South Devon. 
Foreign. Gerolstein, Priim, Eifel ; Grund, Winterherg, North- 
western Hartz. 
Well represented in the Collection by numerous specimens, the 
one from Priim having been presented by Dr. H. Woodward, F.R.S., 
that from Newton by Martin F. Tupper, Esq., D.C.L., F.P.S. 
Cyrtoceras obliquum, Foord. 
Shell large, rapidly expauding, pretty strongly curved ; upon a 
chord of 30 lines, subtending the concave side, the highest perpen- 
dicular is about 3 lines. Transverse section very slightly elliptical, 
the ratio of the two diameters being as 32 : 34. Septa approximate, 
about three lines distant from each other where the diameter of the 
shell is 2| inches ; very shallow ; the sutures pointing strongly 
forwards so as to make an angle in the thicker part of the shell of 
nearly 45°. The siphuncle is large and situated close to the inner 
border. The test is not preserved. 
