Plate XIX. 



Fig. I. 



— 2. 



— 3- 



— 4- 



— 5- 



— 6. 



— lO. 



— II. 



— 12. 



— 13- 



— 14- 



— 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- 



— — globiferous — 



tridentate 



Valve of a tridentate pedicellaria of Colohoceiitrntiis atratus. Obj. II. Oc. I. 



— — — — - Sterecliinus horridus. Obj. II. Oc. I. 



— — — — - — margaritaceiis. Obj. II. Oc. o. 



- Toxocidaris tuberculatus^ from the side. Oljj. II. Oc. I. 



- Coloboceittrohis atratus. Obj. A A. Oc. III. (Zeiss.) 



- Heliocidaris c/i/oroticns, from the side. Obj. II. Oc. I. 



— rarituberculatus. Obj. II. Oc. I. 



- Toxocidaris tjtberculatns. Obj. o. Oc. I. 



— — broad form. Obj. II. Oc. I. 



- Echinus elegaiis. Obj. II. Oc. I. 



- Sterechiiins iiiagci/anicus, from the inside. Obj. II. Oc. III. 



- Heliocidaris chloroticiis, from the inside. Obj. II. Oc. I. 



- Toxocidaris tuberculatus., from the inside. Obj. II. Oc. I. 



- Sterechimts Nentnayeri. Obj. II. Oc. I. 



- Heterocciitrotiis inarnillatiis. Obj. AA. Oc. III. (Zeiss.) 



- Echimis Alexaiidri. Obj. II. Oc. III. 



- Sterechintis 7nagel/anicus^ from the side. Obj. II. Oc. III. 



- Echimis lucidus. Obj. II. Oc. I. 



- Pseudechimis albocinctus. Obj. II. Oc. I. 



- Sterechiniis inargaritacciis. Obj. II. Oc. I. 



- Echinometra van B-nmti. Obj. A A. Oc. I. (Zeiss.) 



- Sterechiniis horridus. Obj. II. Oc. I. 



— inage/lanicus. Obj. II. Oc. I. 



- Echinus esculentus. Obj. II. Oc. I. 



- Pseudechinus albocinctus. Obj. II. Oc. I. 

 Sphseridia of Echinus elegans. Obj. II. Oc. III. 



_ . _ affinis. Obj. II. Oc. III. 



— - — esculentus. Obj. II. Oc. III. 



Valve of a triplnllons pedicellaria of Heliocidaris chlorotictis. Obj. II. Oc. III. 

 Sphseridia of Echinus esculentus. Obj. II. Oc. III. 



— - — Alexandri. Obj. II. Oc. III. 



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



Valve of a tridentate pedicellaria of Sterechi^ms niargaritaceus. Obj. II. Oc. o. 



— — — — - Echinus ^/^jr^wr/r/ (Type-specimen). Obj. II. Oc. o. 



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

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

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



— — tridentate — - — Alexandri ., very small form (of a small 

 specimen). (Jbj. II. Oc. III. 



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



ophicephalons — 

 tridentate — 



globiferous — 



tridentate 

 ophicephalons 

 tridentate 

 globiferons 



tridentate 

 globiferous 



tridentate 



i 



