THE NAUTILUS, XXII. 



PLATE VIII 



\ 



X 



A^ 



1,2,3, ASHMUNELLA KOCHII CLAPP. 4, BIFIDARIA CLAPPl STERKI. 



5,6, HOLOSPIRA BARTSCHI P. & C. 7, BIFIDARIA BILAMELLATA 



STERKl & CLAPP. 



