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species of Apiocrinus and Millericrinus; especially the sub-pentagonal 
and knobbed stems of Millericrinus horridus d’Orb. (= M. echinatus 
Schloth.) are rather well recognisable. Also thin and slender, smooth 
and round stems and free segments occur, which may be derived 
from allied species. The biggest stems measure lOm.m. in diameter, 
the thinnest ones 3 or 4 m.m. and the greatest length amounts to 
20 m.m. I could find these fossils in all places. Besides the stems 
I possess also a very fine centrodorsalplate of a calyx of Millei'icrinus 
originating from the clay-pit near Reuver, with the four sutures of 
fusion distinctly visible (the fused infrabasalia). Opposite to the round 
and roundish pentagonal, smooth or knobbed stems of the Apiocrines 
and Millericrines the remains of other Crinoidea are by far less numerous. 
From the boring 1 near Ylodrop 1 possess some free, starshaped 
segments of a species of Pentacrinus. 
Of Echinoulea I have found only one spine in the clay-pit near 
Reuver. It is a typical spine of Cidaris floriyemma Phill. of a 
length of 12 m.m. Some very thin and small plates of silex, covered 
with regularly arranged knobs, may also be derived from represen¬ 
tatives of this group. 
Very numerous again are all sorts of straight and curved small 
tubes of species of Serpula and Terebella, for which no further 
identification will be possible. Perhaps one spiral-rolled specimen 
from the boring 1 near Vlodrop can be considered as Serpula con- 
voluta Goldf. while the rather common and faintly curved small 
tubes with a distinct parallel suture show much agreement with 
Serpula Umax Gold/. 
Of Bryozod also some fragments are present: a nicely ramified 
little branch from the boring 1 and some other fragments consisting 
of small tubes placed radially from the Reuver and from a trialboring 
near Uden in North-Brabant. The si deification and the rounding however 
have rendered it impossible to identify those remains. 
The Brachiopoda are represented by two specimina of a Bhyn- 
chonella : one very good specimen from the sandquarries of the 
Kollenberg near Sittard and a second incomplete specimen from a 
trial-boring at Reek near Grave. The Sittard specimen is closely allied 
. Rhynchonella ±-plicata Quenst., but shows on the ventral shell 
8lx ra dial ribs ending in the sinus of the frontal limb. It appeared 
impossible to me to identify this species with the literature I could 
dispose of 1 ). The specimen of Reek does not allow any determination. 
kittle fragments of LamelUbranchiata- shells are not at all rare. 
Volt Spec ’ men a PP eared later onto be identical with Rkynchonella Thurmanm 
0 z. from the upper-Jurassic of French Lorraine. 
Proceedings Royal Acad. Amsterdam. Vol. XU. 
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