vine: entomostraca in the wedlock shales 
395 
has the measuring of the specimens described been executed by 
Mr. C. D. Sherborn, that on this head, too, our wants are well 
supplied, but what these respected authors could not do, in the 
absence of my later work, is all that 1 can promise to supply on the 
present occasion. 
Until quite recently I was unacquainted with the shale debris of 
the Ludlow beds. A few months ago Mr. G. W. Shrubsole, F.G.S. of 
Chester, turned over to me some pickings from Mr. Maw's washings 
(3 1 tons of shales), but I have searched them in vain for Ostracoda, 
but tlie remains of Amielida, chiefly Coniulites tcalarijormis, Vine, 
are so abundant, that I regret I did not possess the Ludlow washings 
while I was writing my paper on the " Annelida Tubicolae of the 
Wenlock shales."''' 
li\ the Gothland list of species referred to above, the following 
forms are catalogued as found in the series of Swedish rocks which 
Professor Lindstrom characterises, as equal to our Wenlock shales. 
There are, however in the list, names of several species, and some 
few genera, which, up to the present time, I have not succeeded in 
obtaining, and with this list before him the student will be able to 
compare the range of our own with the range of Swedish species. 
The Silurian Ostracoda of Gothland. 
Horizon of AYenlock Shales only. 
1. Macrocypris Vinei, Jones. 
2. Bythocypris symmetrica, J. 
3. „ concinna, J. 
4. „ Hollii, J. 
0. Thlipsura v-scripta, J. and H., var. discreta, J. 
G. ^chmina bovina, J. 
7. fCytheropsis ? bisulcata, Kolmodin. 
Bursulella, Jones, 1887. 
8. t ,, unicornis, J. 
9. tBeyrichia clavata, Kolm. 
10. ,, Klcedeni, var. granulata, J. 
* Quart. Journ. Gtol. Soc, Aug., 1882. 
t Not as yet found in tlie Biitish strata of W.S, 
