TY  - JOUR
T1  - The Morphology and Evolution of the Ambulacrum in the Echinoidea Holectypoida
JF  - Philosophical Transactions of the Royal Society of London. Series B, Containing Papers of a Biological Character (1896-1934)
VL  - 209
SP  - 377
EP  - 480
PY  - 1920/01/01/
UR  - http://dx.doi.org/10.1098/rstb.1920.0010
M3  - doi:10.1098/rstb.1920.0010
AU  - Hawkins, H.
ER  -