P. perfoliata. P. conica, reclinata, perfoliata.
Testa magnitudine coryli nucis, conica, sed cono retro inclinato, acutissima, alba, imbricata lamellis horizontaliter testam cingentibus. Margo integer, ovalis, antrorsum gibbus s. dilatatus. Cavitas profunde glabra.
This description very fairly suits the Patella antiquata of the twelfth edition of the 'Systema'.
DENTALIUM.
Testa univalvis, subcylindrica, utrinque aperta. Spira regularis nulla.
Although the Serpulæ were intermingled, it is clear that they did not accord with the above definition.
D. elephantinum. D. subulatum subarcuatum, angulatum.
The synonymy of the tenth edition was appended, Lister excepted; the erroneous 13 of the reference to the Gazophylaceum was erased. Dens elephantis was the proposed trivial name.
D. entalis. D. subulato-cylindricum, subarcuatum.
The terminal details were not furnished.