3'J4: vine: entomostraca in the wenlock shales. 
what Dr. Lindstrom designates the " Shale beds of Northern 
Gothland — cceval ^yith the sandstone of South Gothland," (No. VI., 
p. 8, see Bibliogr.) — or equal to our Wenlock shale, it may be 
intoresting to note the range of species identified by the authors of 
the papers referred to above, both in the British and the foreign 
strata of the same geological age. I have also several examples of 
Ostracoda from similar American horizons, but as I am unable to 
refer to published descriptions of the same, I feel that it would be 
unwise to treat of them in connection with the detailed published 
descriptions by the authors already named. This will be a gain, 
rather than a loss to the Pala3ontologist, because I am certain that if 
the American Upper Silurian shales were as honestly searched for 
Ostracoda as our own and the Scandinavian shales have been, many 
forms new to the Palaeontologist would be added to the list now given, 
or a wider range of British and Scandinavian species established. 
In the following notes I deal more particularly with my own 
findings, rather than with those furnished to Professor T. R. Jones 
by Mr. John Smith, of Kilwinning: not because I have any desire to 
force my own to the front, but because I have picked my collection 
of Ostracoda from well-defined and numbered beds in the shales. In 
passing I shall give due prominence to the species supplied by 
Mr. Smith, as there are a few forms met with in his collection 
which are apparently absent in mine. 
After Messrs. Jones and Holl had completed their labours on 
both collections, I went over, carefully, my stock of material again, 
picking out and mounting a very extensive series of known and 
unknown forms from the finer clehris of the various beds, and in this 
sense the present paper may be looked upon as an original contribu- 
tion rather than a mere compilation. Beginning with the lower beds 
and ascending to the highest, I have catalogued the whole of the 
species in my present collection stratigraphically, so that future 
workers on the same beds, or even other beds, higher and lower in 
the Silurian series, may compare and complete the range of species 
both in space and in time. The work of Professor T. R. J ones and 
Dr. Holl has been so honestly carried out, that I cannot promise the 
reader descriptions of new species in this re-working, and so carefully 
