158 University of Texas Bulletin 



PLATE 5. 



Hemiaster, Epiaster, Enallaster Plate 5 



Figures 1-2, 4. Hemiaster calvini Clark Page 114 



Occasional, Weno and Pawpaw formations; rare, Denton and Mainstreet forma- 

 tions; abundant, middle Grayson formation. Fig. 1, large sized individual with 

 strongly developed ambulacral grooves, x 2.0; locality: Argyle, Texas, Gray- 

 son marl, Baylor University Museum. Fig. 2, individual in some respects re- 

 sembling Hemiaster bexwi Clark, x 3.0; locality: 720, basal Pawpaw marl, 

 near Riovista, Texas. Fig. 4, x 2.0; locality: west branch of Little Mineral 

 Creek, one mile northeast of Fink, Texas. 



Figure 3. Enallaster wenoensis n. sp Page 112 



Abundant, Weno formation, marl facies; rare, Pawpaw formation, marl and clay 

 facies. Type individual, x 4.0; locality: 720, basal Pawi.iaw marl, near Rio- 

 vista, Texas. 



Figure 5. Epiaster aguilerae Bose Page 109 



Rare, basal Fort Worth limestone. Locality: 406, one-half mile east of Texas 

 Christian University, Fort Worth, Texas. Aboral side, x 1.0. 



