Platp; 45. 

 1-19. Phormosoma hispidum A. Ag. 



1. Auricles of odd anterior ambulacruui of young specimen 15 mm. in diameter; same 



as PI. 44, tig. 1. 



2. Looking towards the actinostome through the auricles of the left posterior auibulacrum 



of specimen measuring 43 mm. in diameter ; the same as PI. 44, fig. 2. 



3. Looking towards the actinostome through the auricles of the left posterior ambulacrum 



of specimen C4 mm. in diameter, the same as PI. 44, fig. 3. 



4. A corresponding view of tho auricles of tlie right posterior ambulacrum of a specimea 



137 mm. in diameter ; the same as PI. 44, fig. 4. 



5. The same view of the auricles of a specimen 203 mm. in diameter (PI. 41, fig. 2). 



6. Actinal plates of tlie right posterior ambulacrum of a specimen 53 mm. in diameter, 



seen from the exterior ; Station 3400, 



7. Interior vievvof the auricle and actinal plates of the left anterior ambulacrum of speci- 



men 64 mm. in diameter ; same as PI. 45, fig. 3. 



8. Actinal plates of the left anterior ambulacrum of specimen 137 mm. in diameter; Um| 



same as PL 45, fig. 4, seen from the exterior; Station 3392. 



9. The same as fig. 8, seen from the interior. 



10. Plates of the actinostome of the odd anterior ambulacrum of the same specimen. 



11. First buccal plate in odd ambulacrum ; one figure is seen in profile, the other is th<| 



same plate from the inside, 



12. Outside view of first buccal plate of the left anterior ambulacrum. 



13. Part of right posterior ambulacrum and adjoining interambulacrum from the 7t'j 



plate from the actinostome of specimen 203 mm. in diameter, seen from thl 

 exterior. 



14. The same as fig. 13, seen from the interior of the test. 



15. Primary abactinal tubercles with miliaries and secondaries of the odd interainlH| 



lacruin. 



16. Primary spine of an interambulacral area on the actinal side. 



17. Another smaller i)rimary spine. 



18. The same spine as fig. 17, seen from the opposite side. 



19. Base of same sjiine as fig. 16. 



t 



