132 Bibliographical Notices. 
We gather that M. Schmidt’s study of the Leperditie leads him to 
regard Mr. T. R. Jones’s 
Leperditia balthica, Ann. & Mag. Nat. Hist. Nov. 1881, p. 336, 
pl. xix. fig. 1, as doubtful: Suppl. p. 11. 
Leperditia balthica, var. contracta, p. 337, pl. xix. figs. 2, 3, as 
good: Suppl. p. 12. 
Leperditia balthica, p. 336, pl. xix. figs. 4a, 46, as doubtful : 
Suppl. p. 11. 
Leperditia Hisingeri(?), p. 339, pl. xix. fig. 5, as L. Keyserling: : 
Suppl. p. 13. 
Leperditia Hisingert, var. gracilenta, p. 339, pl. xix. fig. 6, as 
L. phaseolus: Suppl. p. 9. 
Leperditia balthica, pp. 335, 336, pl. xix. figs. 10, 11, as L. His- 
ingert: Suppl. pp. 11 and 14. 
Leperditia balthica, var. contracta, p. 338, pl. xix. fig. 138, as LZ. 
Hisingert, var. abbreviata: Suppl. pp. 12 and 16. 
Leperditia balthica, var. contracta, p. 338, pl. xix. fig. 14, as LZ. 
tyraica, on account of its locality : Suppl. p. 12. 
Leperditia phaseolus, var. marginata, p. 341, pl. xix. fig. 15, as 
L. phaseolus: Suppl. p. 10. 
Leperditia Hisingeri, dwarf var., pp. 340, 341, pl. xix. fig. 16, as 
L. phaseolus : Suppl. p. 10. 
Leperditia balthica, var. contracta, p. 338, pl. xix. fig. 17, as 
doubtful: Suppl. p. 12. 
At page 18 of his Supplement M. Schmidt describes a fresh Le- 
perditia marginata, Keyserling, with its varieties rotundata and 
subparallela, from the Waschkina basin, figuring it in pl. i. figs. 13— 
19. Itis the Cypridina marginata, Keyserling, 1846, Reise in 
Petschoraland, p. 288, pl. xi. figs. 16 a-d; Leperditia marginata, 
Schmidt, 1873, Russ. sil. Lep. p. 19, figs. 29-31; and Schm. & 
Jones, Ann. & Mag. Nat. Hist. March 1882, p. 171. 
At page 21, Leperditia Wiluiensis, Schmidt (1873, op. et. p. 17, 
figs. 27, 28), is redescribed and figured, pl.i. figs. 20-22. It is from 
the watershed of the Wilui and Olenek in “ East Siberia.” 
Leperditia Barbotana, Schm. 1873, Russ. sil. Lep. p. 12, figs. 7-9, 
is further treated of at pp. 22 and 87. It is from the banks of the 
Kaga, the Belaja, and the Juresenj, on the west side of the Southern 
Ural, and from the Upper-Silurian or Hercynian beds, passing up 
into the Devonian. 
Leperditia Melleri (and its variety levigata, p. 88), pp. 23 and 
87, is a new species from the same district, and is figured in pl. 1. 
figs. 23-25, and pl. v. a, figs. 23, 24. 
A new variety (uralensis) of Z. grandis, Schrenck, is given at 
p. 24 and p. 87, pl. i. figs. 26-28. It is from the bank of the Belaja, 
below Katschukowa. Some of the limestones of this district are 
almost wholly composed of Leperditie. 
Specimens of a Leperditia-limestone, probably also of Upper 
Silurian age, were collected at Cape Grebenny, in the Waigatsch 
Island (off the Northern Ural) during Nordenskjold’s expedition to 
