VOLUME 43, 1998
$25.00
Esteban, S B., and Rigby, J. K., Hexactinellid sponges from the Lower Tremadocian Volcancito Formation, Famatina Range, northwestern Argentine, p. 1-7, 3 figs.
Hamblin, A. H., Sarjeant, W. A. S., and Spalding, D. A. E., A remarkable mammal trackway in the Unita Formation (Late Eocene) of Utah, p. 9-18, 3 pls. 3 figs.
Rigby, J. K., Senowbari-Daryan, B., and Liu, H., Sponges of the Permian Upper Capitan Limestone Guadalupe Mountains, New Mexico and Texas, p. 19-117, 3 tables, 13pls., 19 figs., 2 append.
Rigby, J. K., Xichun, W., and Jiasong, F., Triassic Hexactinellid Sponges and associated trace fossils from Patch Reefs in north-central Sichuan, People's Republic of China, p. 119-165, 11 pls., 4 figs.
Weidlich, O., and Fagerstrom, J. A., Evolution of the upper Capital-Massive (Permian), Guadalupe Mountains, New Mexico, p. 167-187, 1 table, 4 pls., 9 figs.
Yochelson, E. L., A Field Geologist/paleontologist in western Utah: C. D. Walcott and his work in the House Range 1903 and 1905, p. 189-207, 9 figs.