PLATE IV-. 



Stomopneustes variolaris, /. 1-3. 



1. Seen from the actinal side. 



2. Same seen in proiile. 



3. Seen from tlie abactinal pule. 



Echiuometra lucunter, /. 4' 



. 4. .Seen from the abactinal pole, nat. size. 



Hipponoe variegata, /. 5, 6. 



5. Seen in profile. 



6. Same from the abactinal pole. 



Evechiuus chloroticus, /. ~. 



7. Seen from the abactinal pole. 



{All Fir/s., except 4, two thirds natural si'.vc.) 



