Plate XIX. 



Fig. I. 



— 2. 



— 3- 



— 4- 



— 5- 



— 6. 



— 7- 



— 8. 



— 9- 



— lO. 



— II. 



— 12. 



— 13- 



— 1+ 



— 15- 



— i6. 



— I/- 



— i8. 



— 19- 



— 20. 



— 21. 



— 22. 



— 23. 



— 24. 



— 25. 



— 26. 



— 27. 



— 28. 



— 29. 



— 30- 



— 31- 



— 32- 



— 33- 



— 34- 



— 35- 



— 36. 



— 37- 



— 38- 



— 39- 



— gflobiferous 



trideiitate 



Valve of a tridentate pedicellaria of Colobocejitrotus atyatus. Obj. II. Oc. I. 



— — — — - Sterechiims horridiis. Obj. II. Oc. I. 



— — • — — - — margaritaceus. Obj. IL Oc. o. 



- Toxocidaris tttberculatiis^ from the .side. Obj. II. Oc. I. 



- Colobocentrotus atratus. Obj. AA. Oc. III. (Zeiss.) 



- Heliocidnris c/ilorotiais, from the side. Obj. II. Oc. I. 



— raritubercHlahis. Obj. II. Oc. I. 



- Toxocidaris tnberculatiis. Obj. o. Oc. I. 



— — broad form. Obj. II. Oc. I. 



- Echiniis clegaiis. Obj. II. Oc. I. 



- Sterechiiiits iiiagellajiicus, from the inside. Obj. II. Oc. III. 



- Heliocidnris chloroticiis^ from the inside. Obj. II. Oc. I. 



- Toxocidaris ijtbercwlatzis, from the inside. Obj. IL Oc. I. 



- Sterechiims Netunayeri. Obj. II. Oc. I. 



- Heterocejitrotus inainillatits. Obj. AA. Oc. III. (Zeiss.) 



- EchijiHS Alexandri. Obj. II. Oc. III. 



- Sterechinns mage/lanicns, from the side. Obj. II. Oc. III. 



- Echitiits liicidiis. Obj. II. Oc. I. 



- Pseiidechiniis albocitictits. Obj. II. Oc. I. 



- Sterechinns margaritaceus. Obj. II. Oc. I. 



- Echinometra van Brunti. Obj. AA. Oc. I. (Zeiss.) 



- Sterechinns horridiis. Obj. II. Oc. I. 



— inagellatiicus. Obj. II. Oc. I. 



- Echiniis esciilcntiis. Obj. II. Oc. I. 



- Pseiidechiniis albocinctiis. Obj. II. Oc. I. 

 Sphæridia of Echiniis elegajis. Obj. II. Oc. III. 



_ . _ affiiiis. Obj. IL Oc. IIL 



— - — esculentus. Obj. II. Oc. III. 



Valve of a triphyllons pedicellaria of Heliocidaris chloroticits. Obj. II. Oc. III. 

 Sphæridia of Echiniis esculentus. Obj. II. Oc. III. 



— - — Alexandri. Obj. II. Oc. III. 



— - — acutus^ var. Fleniingii. Obj. II. Oc. III. 



Valve of a tridentate pedicellaria of Sterechinns margaritaceus. Obj. II. Oc. o. 



— — — — - Echinus Alexandri (Type-specimen). Obj. II. Oc. o. 



— — — — - Heterocentrotus trigonarius. Obj. AA. Oc. II. (Zeiss.) 

 Two valves of an ophicephalous pedicellaria, in connection, of Echinus acutus. Obj. II. Oc. I. 

 Valve of an ophicephalous pedicellaria of Echinus atlanticus. Obj. II. Oc. o. 



— — tridentate — - — Alexandri ^ very small form (of a small 

 specimen). Obj. II. Oc. III. 



Valve of a tridentate pedicellaria of Heliocidaris chloroticits. Obj. II. Oc. I. 



ophicephaloiLs — 

 tridentate — 



globiferous — 



tridentate 

 ophicephalous 

 tridentate 

 globiferous 



tridentate 

 globiferous 



— tridentate 



