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Family.— POL YCOPILjE. 
Ohs. — Weatlicred surfaces of tlie Muree Eock are in places covered 
with more or less depressed pea-like bodies. These were referred^ by Prof, 
de Koninck to the British Carboniferous Limestone Ostracod Polycope 
simplex, J. and K. I much regret that I cannot accept these little organisms, 
of which the collection contains a large number of specimens, as Ostracoda. 
They appear to me to bear evidence of an undoubted Molluscan affinity, and 
are probably the fry of Pelecypoda. In this view I am fortified by the 
oj)inions of Profs. T. E. Jones, and T. W. Edgeworth David. 
In the first place De Koninek’s deserijdion is not that of the fossils he 
had before him, hut is a free rendering, and in some points word for word, 
with that of the species given by Messrs. Jones, Kirkhy, and Brady, in their 
“ Monograph of the British Dossil Bivalved Entomostraca from the Carboni- 
ferous Dormatioiis The Molluscan affinity is based on the following 
evidence : — 
a. The generally oval form is irregularly so Avithin certain Avide limits, 
i. e., it does not show the defined regularity it should, to bring the 
organisms within the diagnosis of Polycope. 
h. A cui’A'ed striated dorsal area exists in all the specimens, large and 
small, similar to that of many so called Monomyarian molluscs. 
c. The largest examples seen begin to take on the appearance of a 
Mytiliform or Inoceramiform shell. 
d. Incipient umhones can he traeed in many speeimens. 
A close inspeetion of De Koninek’s Dig. 7 Avill reveal the incipient 
umhones, and the dark shadow surrounding each, representing the cast of the 
striated area. It is more than probable that these are the fry of a species of 
■Aphania, or even perhaps an Amculopecten. 
* Foss. Pal. Nouv.-Galles clu Sud, 1877, Pt. .3, p. 340, t, 24, f. 7 and 7a. 
* Pt. 1, 1874, p. 54, (Pal. Soc). 
