U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 84 PLATE 13 



1, Clypeaster marinanus, new species, Meson formation, Hacienda Santa Fe, Topila, Mexico, locality Ml'JV. 

 paratype, ventral view, U.S.N.M. no. 496277; 2, C. topilanus, new species, same formation and locality, 

 holotype, dorsal view, U.S.N.M. no. 496278: 3, C. topilanus, same formation and locality. Corona collection 

 no. 14, paratype, ventral view, U.S.N.M. no. 496279; 4, Laganum leptum, new species. Meson formation, 

 on line of Transcontinental Railroad, lot 145, Hacienda Chinampa, 8 km east of town of Chinampa, Can- 

 ton Tuxpan, Veracruz, at the first cut examined November 28, 1920, holotvpe, dorsal view, U.S.N.M. 

 no. 496280. (Five-sixths natural size. ) 



