( 4 ) 



1^ + H i{5 {m ^^r.w m) 



1,2,3,4. Sphaerechinus pulcherrimus BABN (I^+H^HAUM) 



5,6,7,8. Toxopneustes elegans DOD (^-j-HSHASM) 



9,10,11,12. Hipponoe variegata LESKE (I^+^^HAt^M) 



1,2. Fibularia australis DESKE (I^+HSHAt^M) 



3,4. Fibularia acuta YOSH (I^+::1SHA4:M) 



5,6,7,8. Clypeaster japonica DOD (I^+II^HAAM) 



9,10. Clypeaster viresce as DOD (||-hIlSHA;^M) 



1,2,3,4. Clypeaster scutiformis LAMK (^-fll^HAiLM) 



5,6,7,8. Laganumdepressum LESS (ll+nigH^'LOM) 



9 10,11,12,13. Laganum decagonalis L£;S^ kM-^^^M^XOM) 



14,15. Echinaraclinius parma LAMK ( l^+ZlSHiLUM ) 



m^ ^ m. cm s^^h ^j 



1,2,3,4. Laganum fudsiyama DOD (H+H^H;^— M) 



5,6. Laganum pellucidum DOD ( ||+ r.-SE.jL—M) 



7,8. Laganum decagonalis LESS ( |J^-hZlSHiL— M ) 



9,10. Echinaraclinius mirabilis BARN ( ^-^^H^EiJlIlM ) 



11,12. Astriclypeus manni FEirJJLL (|g+.-SH;/LHM) 



B + -t: )iK (^ S^=.H M) 



1,2. Echinoneus cyclostomus LES'Iii; (|g-hr.SH;'LEgM) 



3,4,5,6. Hemiaster gibbosus A. AG (^-^'Il'^^JL-t'M ) 



