TABLE V.

PHANEROGRAM AND CRYPTOGRAM

Virus		Phanerogram	Cryptogram
	DNA or RNA	+	+
Nucleic acid	Single- or double-stranded nucleic acid	0	+
	Molecular weight	0	+
	Percentage in the virion	0	+
Virions	Presence or absence of an envelope	+	0
	Shape	0	+a
	Symmetry	+	0
Nucleocapsid	Number of capsomers (cubical symmetry) or diameter (helical symmetry)	+	0
	Form	0	+b
Hosts		0	+
Vectors		0	+

^aThe difference between virion and nucleocapsid is necessarily related to the presence of an envelope (see text).

^bThe shape of the nucleocapsid will evolve rapidly toward symmetry (see text).