PLATE LXXIV. 



1, Columbella mercatoria, enlarged. 



2, Columbella (Amphissa) corrugata, en- 



larged. 



3, Columbella (Astyris) gausapata, much 



enlarged. 



0, Tritonidea tincta. 



4, Nassa fossata, about natural size. 



5, Nassa mendica, enlarged. 



6, Nassa perpinguis, enlarged. 



7, Nassa tegula, enlarged. 



8, Siphonalia kellettii, reduced. 



