Echinocardium mediterraneum, /. ^'9, JO. 



•20. Tip of lU'DUj; of lony-lKjadcd [UMliifllai-iu. 



30. Single prong of opL'n-lifuded jjediccllaiia. 



Lovenia elongata, /. "1. 



31. Profile of long-headed inteiaiiiljulacral pedicellaria. 



Breynia Australasiae, /. ,1J. 



32. Interior of prong of an interanilmlacral pedicellaria. 



Maretia planulata,/. 33, 34. 

 33, 34. Profile and interior of prong of long-stemnied pedicellaria. 



Spatangus Raschi, /. 35. 



35. Interior of prong of stout-headed, short-stemmed pedicellaria. 



Brissus carinatus, /. 30, 37. 

 36, 37. Profile and interior of loiig-lieaded pedicellaria. 



Echinarachnius parma, /. 38 - 41. 



38, 39, 40, 41. Different stages of bifid marginal pediceUariae. 



{All Figs, mafjnijied about twenty diameters unless othencisc stated.) 



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