190 
Henry Schröder, Pseudoseptale Bildungen 
of the shell; over the siphuncle and leading down to it is an elon- 
gated deep hollow in the direction of the longer diaineter; from 
this , radiating impressed lines or furrows proceed to the eircum- 
ference, having the aspect of heilig produced by folds . . . The 
section shows that the siphuncle narrows at the junction of the 
septa and expands cylindrically in the chanibers; the septal distance 
and convexity is confirmed, and it is seen that the surface which 
is exposed at the ends is not the septal surface; the latter are 
apparently smooth and the tliickness small, and the short necks 
are seen so turn rapidly outwards from the siphuncle; above these 
is the dark deposit, whose exterior is exposed when the fossil be- 
comes broken; this has a greater convexity then the septum, and 
is continous in appearance with the exterior of the shell. Its occu- 
rence in two or three chanibers proves that it is not a deposit 
formed after the smaller end of the shell is broken oft’. The 
nmnber of small fragments which occur, consisting of one or more 
chanibers with cliaracteristic ends, shows that the breaking off was 
not an uncommon circumstauce, and very possibly took place du- 
ring the life. On the surface of these caps the deeper furrows lie 
on the side uearest to the siphuncle; they are generally median, 
but occasionally paired ; on the other side are three or more lighter 
furrows, which occasionally bifurcate. It is difficult to conjecture 
the cause of these phenomena, which must have had their origin 
between the formation of one septum and the. next. I can only 
suggest a shriukage of the mantle during the iuterval, by which 
it was thrown into folds, which were perpetuated by an abnor- 
mal deposit on their surface ... A fragment, figured by Barrande 
under the title Orth, sarcinatum , shows very similar features on 
a pseudoseptal surface.« 
Bei einem Vergleich dieser Beschreibung mit der oben von 
Orth. Berendti gegebenen unter Hinzuziehung der beiderseitigen 
Abbildungen wird man ohne Weiteres zugeben, dass bei beiden 
sogar bis in die Einzelheiten ähnliche Erscheinungen vorliegen. 
Interessant ist namentlich die grosse Anzahl der radiären, aber 
doch symmetrisch angeordneten Furchen; an Orth. Berendti sind 
nur vier beobachtet, während das abgebildete Exemplar 
von 
