ANY, BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Order Camarodonta—Continued. Page 
Family Toxopneustidace 2. = =~) se eee ie ee ee ee 48 
Genus ‘Totopneustes: = Sse ene ee ee ee ee 48 
Genus. Tripneustes.242 5 ee ee a are ae ee eee ee 48 
Family Hehinometridac:. 32 -: see ee ee eee 49 
Genus ‘Parasalenias< 52 s\b SF eee = 2 ae 49 
Genus Selenechinust => Sat ees oe ee 2 ae ee 50 
GenuseBch7wostre lis a eee eee ea een ly 50 
Genus Echinometras sae as See ay 3 ea 51 
Genus Heterocentrotusee ee ee 52 
