Recent Publications. 55 
schists. It is to be rioted that under the term Stockbridge he lias in- 
cluded the Stockbridge proper and the western belt known as the Sparry 
limestone: that the two limestones are the same is evidently an assump- 
tion. Numerous Lower Silurian fossils have been found in the western 
belt, but in the Stockbridge proper we know of none but Lower Cambrian 
fossils. Moreover, it seems rather peculiar that one continuous lime- 
stone should represent all the accumulation in this region from the 
Lower Cambrian up to the Hudson River, while not far distant there is 
known to be a great thickness of other fossiliferous rocks between these 
two horizons. Again, Mr. Dale's idea allows no place for the uncon- 
formity which seems to exist at the base of the Potsdam. It. however, 
must be admitted that his work in the Vermont valley.* in connection 
with that of Dr. J. E. Wolff, f points to the Cambro-Silurian age of the 
Stockbridge limestone; still, it seems probable that an explanation diff- 
fering from that of Mr. Dale's can be applied to the relations of the 
Lower Cambrian and the Lower Silurian limestones in the Rutland 
region. The Silurian age of that part of the Berkshire schists adjoining 
the Stockbridge proper does not seem to be established by fossils, and it 
is not at all improbable, in fact it seems very probable, that at least 
some parts of these schists are of tin- same age as the ureal thickness of 
Cambrian schists and slates not far to the north in Vermont. 
The placing of the Rensselaer gril at the base of the Upper Silurian 
adds another feature of complexity to the original Taconic region. Mr. 
Walcott's map. published in 18884 makes "•' "' ,u <' area mapped by Mr. 
Dale as Rensselaer gril Lower Cambrian (Georgian), and now this grit 
series is placed in the Upper Silurian on no evidenee derived from fos- 
sils, and that. too. in a region in which the deciphering of_the structural 
geology is an extremely difficult task. n. h. w. 
RECENT PUBLICATIONS. 
Fun ign. 
Records of the Geological Survey of New South Wales, Vol. 3, Pt. 1, 
189.'}, contains: On a sand from Bingera, G. W. Card; On the occur- 
rence of Trigonia aemiundulata M'Coy, in New South Wales, and its 
significance, R. Etheridge; On the occurrence of basalt-glass (tachylyte) 
at Bulladelah, G. A. Stonier; On palatal remains of Palorchestes azael 
Owen, from the Wellington Caves bone-deposits, W. S. Dun; Minera- 
logical and penological notes, No. 1, G. W. Card; Note on an aboriginal 
skull from a cave at Bungonia, R. Etheridge; The Australian geolog- 
ical record for the year 1892, with addenda for the year 1891, R. Eth- 
eridge; A locality index to the Reports of the Geological Survey of 
*On the structure and age of 1 1 in Stockbridge limestone in the Vermont \ alley : Bui, 
Geol. Soc. Amer., vol. in. pp. 514-518, 1892. 
fOn the Lower Cambrian age of the Stockbridge liiiM-stoni' ; It)id. vol. u. pp.3 I 
189i. 
lAmor. Jour. Sci.. 3, vol. :'»r». 
