Bd VI: 4) 



THE ECHINOIDEA. 



109 



Fig. 7. Abatus cavernosas, rf. Abactinal side. z / x . 

 » 8. » » ; elongate form. a 71 . Abactinal side. Vi. 



» 9. » Agassizii. tf. Abactinal side. z / x . 

 » 10. » cavernosas. $. » » » 



» 11. » » ; elongate form. 9- Abactinal side. z / x . 



» 12. » » » » Actinal side. z / x . 



» 13. » » . Abactinal side. The white spots are specimens of a com- 



mensalistic bivalve Mollusc (Lepton sp.). z / x . 

 n 14. » Agassizii. Type specimen. Abactinal side. z / x . 



Plate XI. 



Fig. 1. Tripylus exca.va.tus; side view. Same specimen as Figs. 14 and 16. z / x . 



» 2. Amphipneustes Koehleri; abactinal side. Same specimen as Fig. 4. 3 ' 5 / z . 

 » 3. » » cf 1 . Abactinal side. 



» 4. » » Actinal side. Same specimen as Fig. 2. 3 * s /i. 



» 5. » » 9- Side view. Same specimen as Figs. 15 and 18. z / x . 



» 6. Abatus Philippii. Type specimen, cf. Abactinal side. z /i. 



» 7. Amphipneustes Koehleri. q 71 . Side view. Same specimen as Fig. 3. z / x . 



» 8. » » d Actinal side. Same specimen as Fig. 3. 



» 9. Abatus Philippii. Abactinal side. J /i- 



» 10. » » 9- Abactinal side. x /i. 



» 11. » » rf 1 . » * 1 (These specimens were identified by Lo- 



» 12. » » 9- * >; ' V1 ^ N as A. caver nosus.) z / x . 



» 13. » » cf 1 . » » Type specimen. x / x . 



» 14. Tripylus cxcavatus. rf. » » Same specimen as Figs. 1 and 16. r /i. 



» 15. Amphipneustes Koehleri. 9- Abactinal side. Same specimen as Figs. 5 and 18. z / x . 



» 16. Tripylus excavatus. Actinal side. Same specimens as Figs. 1 and 14. z / x . 



» 17. Amphipneustes Lorioli. Abactinal side. Same specimen as Fig. 19. z / x . 

 » 18. » Koehleri. Actinal side Same specimen as Figs. 5 and 15. z / x . 



» 19. » Lorioli. » » » » » Fig. 17. z / x . 



Plate XII. 



Fig. 1 . Amphipneustes Koehleri, young specimen. Abactinal side. Note the large globi- 

 ferous pedicellarise. 3-s/j. 



» 2. Tripylus excavatus ; hind view. Same specimens as Figs. 4, 6 and 9. */*■. 



•» 3. Amphipneustes Koehleri. Actinal side. Same specimen as Figs. 5 and 7. z / x . 



» 4. Tripylus excavatus. Abactinal side. Same specimen as Figs. 2, 6 and 9. z / x . 



■> 5. Amphipneustes Koehleri. Abactinal side. Same specimen as Figs. 3 and 7. 



» 6. Tripylus excavatus. Actinal side. Same specimen as Figs. 2, 4 and 9. z / x . 



» 7. Amphipneustes Koehleri. Side view. Same specimen as Figs. 3 and 5. z / x . 



» 8. Schizaster (Tripylaster) Philippii. Side view. Same specimen as Figs. 10 and 1 1. 



» 9. Tripylus excavatus. Side view. Same specimen as Figs. 2, 4 and 6. r /S 



