300 



EXPLANATION OF PLATE 51 

 Figure Page 



345. Anachis avara seiniplicata (Stearns), egg capsules 159 



346. Nitidella nitidula (Sowerby) 160 



347. Nassarins vibex (Say), egg capsules and embryonic shells 162 



Fig. a. Side view. Fig. b. Front view. Fig. c. Embryonic 

 shells, interior and exterior view. 



348. Canthanis tinctus (Conrad), egg capsules and embryo 162 



Fig. a. Front view. Fig. b. Top view. Figs. c. Embryonic 

 shells, exterior and interior view. 



349. Bnsycon "contrarium Conrad", egg capsules and embryo 164 



Fig. a. Side view. Fig. b. Front view. Fig. c. Embryonic 

 shells, exterior and interior view. 



\ 



