TY  - JOUR
T1  - On Holtenia, a Genus of Vitreous Sponges. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 18
SP  - 32
EP  - 35
PY  - 1869/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1869.0010
M3  - doi:10.1098/rspl.1869.0010
AU  - Thomson, W.
ER  -