174 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XXIL 



All figures natural size. 



Fig. 5. Scidella Gabbi Remond. 

 Fig. 5a. Scntella Gabbi Remond. 



Showing form and arrangement of plates and pores. 

 Fig. 6. Scntella inierlineata Stimpson. 

 Fig. 7. Echinarachnms Gibbsi Remond. 

 Fig. 8. Echinarachnius excentricus Eschscholtz. 



