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Parker —On the Sheleton of Archeopteryz. 55 
Venus fluctuosa, Gould (astartoides, Beck), is found living in 
Behring’s Straits, Greenland, Spitzbergen, and Newfoundland. 
Montacuta bidentata. Prof. E. Forbes mentions ‘a Bridlington 
fossil in Mr. Bowerbank’s collection, which appears to belong to 
this species.’—Catalogue of Shells from the Glacial Beds, Mem. 
Geol. Survey, vol. i. p. 409. 1846. Mr. Searles Wood has not con- 
firmed this reference. 
Panopea Norvegica. This shell is not found in the Norwich 
Crag, except at Chillesford, under exceptional circumstances. 
Nore ON THE FORAMINIFERA OF THE BrIDLINGTON Crac. 
In a collection of Foraminifera of the Bridlington Crag, 
made some years since by Mr. H. C. Sorby, F.R.S., and re- 
ferred to in the foregoing paper, Messrs. T. Rupert Jones and 
W. K. Parker have observed the following species and notable 
varieties :-— 
Cornuspira foliacea, Philippz. Dentalina communis, D’ Orbigny. 
Biloculina ringens, Lamarck. Cristellaria cultrata, Montfort. 
Triloculina oblonga, Montagu. Polymorphina lactea, VW. and J. 
Quinqueloculinatriangularis, D’O.| Cassidulina levigata, D’ Orbigny. 
Q. Seminulum, Linn. Truncatulina lobatula, W. and J. 
Lagena sulcata, V. and J. Nonionina scapha, #. and M. 
L. squamosa, Montagu. Polystomella striatopunctata, 
Dentalina brevis, D’ Orbigny. Fichtel and Moll. 
These are such as are at present found in Northern Seas 
from the shore-line to about fifty fathoms; and, excepting 
Cassidulina, all occur in the Crag of Suffolk.—T. R. J. 
II. REMARKS ON THE SKELETON OF THE ARCHAOPTERYX 3 AND ON 
THE RELATIONS OF THE BirD TO THE REPTILE. 
By W. K. Parker, F.Z.S. 
[LN Plate 1 of Professor Owen’s invaluable memoir on the 
Archeopteryz (Phil. Trans. 1863), the fifth vertebra behind 
the Acetabula is seized upon as the first of the caudal series. 
In Pl. 3, fig. 5, of the same memoir, we have the delineation 
of a young Ostrich’s pelvis; and in that figure the first post- 
femoral joint is marked as the commencement of the true tail ; 
eight such joints being, even in the young bird, embraced by 
the posterior processes of the iliac bones. 
Noting this discrepancy, I was led to examine the pelves of 
a large series of birds (see Zool. Proc. 1864); and this led me 
to see that the least number of post-femoral vertebrae embraced 
by the iliac bones is three; for instance, in the smaller Raptores, 
in some of the smallest Jnsessores, and in a few of the feeblest 
Gralle. 
