Anatomii of the TeuinopleurkljB. lol 



Fig. 2. Temnopleurus toreumatims, Agass. A compound ambulacral 



plate, a, adoral primary ; 6, middle demi-plate ; c, aboral pri- 

 mary component plate. Mag. P. 112. 

 Fig. 3. A plate seen from within, during the drying of benzule, showiug 



the great separation of the pores of the pairs. JNIag. P. 113. 

 Fig. 4t. Sahnacis bicolor, Agass. Inner view of ambulacral phites. Same 



references as in tig. 3. Mag. P. 1 13. 

 Fig. 5. Mespilia globulus, Agass. An ambulacral plate seen from within 



the test under benzule. Mag. P. 1 13. 

 Fig. G. Microcyphus zigzag, Agass. An ambulacral plate, sutures seen 



under benzule. Mag. Pp. 113, 114. 

 Fig. 7. Same plate from within. Mag. P. 114. 

 Fig. 8. DiasTam of an adoral canal of a pair, oblique and reaching the 



peripodium. Mag. P. 114. 

 Fig. 9. Ambulacral plates near the apex, seen from within, under benzule. 



Mag. P. 114. 

 Fig. 10. Plates nearer the ambitus, abnormal distribution of j-utures. 



Mag. P. 115, 

 Fig. 11. Plates still nearer the ambitus, abnormal, under benzule. Mag. 



P. llo. 

 Fig. 12. Plate below the ambitus, abnormal. Mag. P. 115. 

 Fig. 13. Amhh/pneustes ovum, Lamk., sp. Ambulacral plates with 



sutures under benzule : c is a low, broad demi-plate. P. 116. 

 Fig. 14. Holopneusfes purpuresccns, A. Ag. A single and double com- 

 pound ambulacral plate under benzule : a, the adoral component 



plate, is a primary which is excluded at the ambulacro-iuter- 



radial suture. P. 117. 

 Fig. lo. Inside view of plates nearer the apex. Mag. Pp. 118, 119. 

 Fig. 16. View corresponding to fig. 14, from within. Mag. Pp. 118, 119. 

 Fig. 17. Temnopleurus toreumaticus. A branchia decalcified and mag. 



30. P. 122. 

 Fig. 18. Part of a finger-shaped process highly magnified. MaR-. GO. 



P. 122. 

 Fig. 19. Epithelium. Mag. 120. P. 122. 

 Fig. 20. A small tuft of the branchia of SaJmacis not decalcified. Mag. 



P. 123. 

 Fig. 21. Ampullfe of Temnopleurus, decalcified: a, water-canal. Mag. 



P. 123. 

 Fig. 22. Spots upon the ampullfe, with muscle-fibres leading inwards 



into the ampulla. Mag. 80. P. 124. 

 Fig. 23. End of a prong of a tridactyle pedicellaria of Temnopleurus. 



Mag. P. 129. 

 Fig. 24. Head of a large globifera. Mag. P. 120. 

 Fig. 2o. A triphyltous pedicellaria, with a soft stalk placed upon a 



spinule. Mag. P. 129. 

 Fig. 26. Part of the calcareous circlet of a tentacle of Temnopleurus. 



Mag. P. 120. 

 Fig. 27, The psellion. Mag. P. 128. 

 Fig. 28. Section of a spine of Temnopleurus. Mag. P. 120. 



The amplification in most of these drawings is small. 



