LIST OF ILLUSTRATIONS. 



PLATES. 



Some Upper Cretaceous Shells of the Rudistid Group prom Tamaulipas, 



Mexico. 



By L. W. Stephenson. 



Facing page. 



1-4. Tampsia bishopi Stephenson 14 



5-8. Tampsia chocoyensis Stephenson 14 



9-10. Sauvagesia degolyeri Stanton? 14 



11. Sauvagesia belli Stephenson 14 



12-14. Sauvagesia coloradensis Stephenson 14 



15. Durania manuelensis Stephenson 14 



A Revision of the Chalcid-Flies of the Encyrtid Genus Chrysoplaty- 



CERUS. 



By P. H. Timberlake. 



1. Forewings of Chrysoplatycems ferrisi Timberlake 10 



The Smallest Known Horned Dinosaur Brachyceratops. 

 By Charles W. Gilmore. 



1. Mountedskeletonof5/ac%ceratops??ior!tanensis, viewed from the left side ... 4 



2. Mounted skeleton of Brachyceratops montanensis, viewed from the right side . . 4 



3. Moimted skeletons of Brachyceratops and Tricei-atops 4 



4. Restoration of Brachyceratops montanensis 4 



On Meteoric Irons from Alpine, Brewster County, Texas, and Signal 

 Mountain, Lower California, and a Pallasite from Cold Bay, 

 Alaska. 



By George P. Merrill. 



1. Fig. 1. The Signal Mountain, Lower California, octahedrite, magnified 



2i diameters; showing in the upper left secondary graiuilation 4 



2. The Alpine, Texas, ataxite. Polished surface magnified about 



4 diameters 4 



2. Fig. 1. The Cold Bay, Alaska, pallasite. Broken and polished surfaces. 



Enlarged about one-fourth 4 



2. The Cold Bay, Alaska. Polished surface. Enlarged 2^ diameters. . 4 



Crinoids from the Upper Cretaceous of Tamaulipas, Mexico. 



By Frank Springer. 



1. A new crinoid from the Upper Cretaceous of Mexico 4 



VII 



