Field and Laboratory
Volume 21, Number 3 (1953)
Articles
Ecological Observations Upon the Fresh-Water Sponges in Dallas County, Texas
E. P. Cheatum and Joseph P. Harris Jr.
Geology of the Preston Hollow Quadrangle (Dallas, Collin, and Denton Counties, Texas)
George. W. B. Hall Jr.
Geology of the Pleasant Grove Area, Dallas County, Texas
Dale O. Overmyer
Abnormal Digits in Necturus
Joseph P. Harris Jr.
Note
Unusual Variations in the Skeleton-Spicules of Fresh-Water Sponges
E. P. Cheatum and Joseph P. Harris Jr.
