Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 759
shown in verticalsections, Fig. 393), and terminate internally by open orifices(Fig. 392, a), whilst externally they are covered by the periostra-cum (b). Their diameter is greatest towards the external surface,where they sometimes expand suddenly, so as to become trumpet- X X 674 SHELLS OF…
Microscopy · Biology
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
