TY  - GEN
AU  - Agassiz,Louis
TI  - On the principles of classification in the animal kingdom: on the structure of the halcyonoid polypi ; on the morphology of the Medusa 
PY  - 1850///
CY  - Charleston, S.C., : 
PB  - Steam-Power Press of Walker and James
N1  - From Proceedings of the Third Meeting of the American Association for the Advancement of Science, held at Charleston, March, 1850
ER  -