504 
Sporidesmium, new British species of, 
‘ 
Steenstrup, J., on the structure of 
the branchial cavity of the Zeugo- 
pteri, 72. 
Stephania, characters of the genus, 
13. 
Suess, Prof. E., on the existence of 
Hyalonema im a fossil state, 404. 
Swinhoe, R., on a new species of 
Martes, 286. 
Taylor, Rev. R., on the habits of 
Zosterops dorsalis, 140. 
Tetragnatha, new species of, 467. 
Tetragonopterus, new species of, 30. 
Thelocarpon, new species of, 23. 
Theridion, new species of, 458. 
Thomisus, new species of, 456. 
Thorell, T., on the morphology and 
systematic position of the Argulide, 
149, 268, 436. 
Thylacoleo carnifex, on the dentition 
of, 148. 
Tieghem, M. van, on the amylaceous 
globules of the Floridez and Co- 
rallinez, 117; on the structure of 
the anthers in the Aroidez, 138. 
INDEX. 
Traquair, Dr. R. H., on the anatomy 
of Calamoichthys, 114. 
Trichia, new British species of, 56. 
Tursio Eurynome, note on, 100. 
Unger, Prof., on the organic bodies 
contained in ancient Egyptian 
bricks, 141. 
Urocentrum Turbo and Peridinium 
Cypripedium, on the affinities of, 
9 
Van der Hoeven, J., on the genus 
Menobranchus and its natural affi- 
nities, 363. 
Verrucaria, new British species of, 
104. 
Volutes, new species of fossil, 375. 
Walker, J. F., on some Lower-Green- 
sand fossils, 31, 381. 
Whales, notes on some, 495. 
Zamenis, new species of, 27.- 
Zeugopteri, on the structure of the 
branchial cavity of the, 72. 
Ziphius, on a cranium of, 255. 
Zoophytes of Devonshire, additions 
to the, 426. 
Zosterops dorsalis, on the habits of, 
140. 
END OF THE EIGHTEENTH VOLUME. 
PRINTED BY TAYLOR AND FRANCIS, 
RED LION COURT, FLEET STREET. 
