i;8 STUDIES IN GEOLOGY, No. 3 



PLATE I. 



Fig. i. Terebra gausapata var. herviderana Spieker, x2. 



2. Terebra tuberosa (Nelson), x2. 



3. Conus bocapanensis Spieker, x2. 



4. Conus berryi Spieker, x2. 



5. Conus cacuminatus Spieker. 



6. Conus molis var. bravoi Spieker. 



7,8. Calliostoma (Eutrochus) noduliferum Nelson, x2. 



9. Marginella incrassata Nelson. 



10, ii. Solenosteira alternata (Nelson). 



T2. Phos (?) latirugatus Spieker. 



