TY  - JOUR
T1  - Polytremacis and the Ancestry of Helioporidae
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 66
SP  - 291
EP  - 305
PY  - 1899/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1899.0104
M3  - doi:10.1098/rspl.1899.0104
AU  - Gregory, J.
ER  -