278 PLANTZE CELLULOSE APHYLLEA. 
Thallus solid, fleshy; covering 
membranaceous: sporidia scattered 
within the substance......... SARCO’ fHECER. 10. 
Thallus cellular, fleshy ; sporid: a 
in oblong thecze on the membra- 
maceous covering .......... HYMENOTHECEZ. 11.. 
Thallus fleshy ; sporidia in longi- 
tudinal thecze on the deliquescent 
covering) Sa TT. apd LYTOTHECEA. 12. 
Fam. I. 1. HYDROPHYTZ. Algarum pars, Linnzeus 
and Jussieu. 
Thallus tubular, membranaceous, leatherlike or gelati- 
nous, continuous or jointed; tubes filled with sporidia; 
sporidia globose or elliptical; plant aquatic, rarely marine. 
A. Thallus not jointed ; sporidia transverse, in a single 
longitudinal row, within the tube. Oscillatorideze. 
Threads gelatinous, simple, several to- 
gether enclosed in a cylindrical sheath ... Vacinaria. 1. 
Threads gelatinous, simple, decumbent, 
upon a eelatinous stratum .jlegiti bend sis OSCILLATORIA, 2. 
Threads gelatinous, simple, chalet 
iteegiramquil*. 4... '.. ASUS Sane BON Sei it - Huma, 4, 
Threads gelatinous, tufted, upright, 
PRS TAMQUEL 6 Me le ain tee opel bag Evisa. 4. 
Threads gelatinous, upright from a 
<sommon centre, forming a mass.......-- Rivuwaria. 5. 
Threads leatherlike, ee a ‘see. SCYTONEMA. 6. 
B. Thallus not jointed; sporidia in many transverse an- 
nular series. Bangidew. 
Sporzdre elobular.o3.'.. aes ts on @ MOR ARDEA. 73 
C. Thalius not lacie sporidia in tufts, on the mside of 
the tube. Lemanidex. 
Phreads torulose; sporidia elliptical). .... Lemania. 8. * 
D. Thallus not jointed ; sporidia scattered in the tube and 
branches. WVaucherideze. 
Thallus pinnate; branches linear .....+- BRYOPSIS. 9- 
