EXPLANATION OF PLATE IX. 



(All figures after Clarkj 



PSEL'UOIIIAHEMA DIATRETUll ( Murt^iii ) p. 



1-2. Ventral and lateral \ie\\N 'if a complete indi\idual, (Figure 

 I enlarged). 

 3. Twii interaniliulaeral iilales. ( .K4 ) . 

 4-5. Piirti'jiis nf the aniliulacral area highly uiagnilied. 

 6. Tuhercle, luuch enlarged. 



/ 'nwi'nti'z^'ii linicsiiiui : J'iiicciitown. 



2S5 



PsEriiuiii.\i)EM.>i SPECiosuM Clark 



7-<S. Din'sal and lateral \ue\\ s of a cmiplete uidi\idual. 



.p. 286 



9- 



10. 



1 1 - 1 2 



13 



14 



L'ppcr portion e.f an interaniliulacra! area, enlarged. 

 Three interambulacral plates, lugiily magnified. 

 Prirtions of the anibulaeral area, highly magnified. 

 Tnl.iercle of aml.)ulacr,al area. 

 Tuliercle of uiteramlml.acral .area. 



l'iiiLi'iil,>i^ii hiiicsaiiJ: I'liicciitoz^ii. 



8g8 



