THE HARTSTONGTJE. 
143 
S. V. transverso-lobatum (transversely lobed). Frond 
divided near top; divisions cross eacb other, and then crest 
heavily. 
S. V. undulatum (wavy). Intermediate between normal 
and cris'pum. 
S. V. undulato-rigidum (rigidly wavy). Stiff-growing, fertile 
form of crispum. Spores yield a proportion of crispum 
fimbriatum. 
S. V. undulato-supralineatum (wavy, lined above), Jones. 
A superior form of supralineatum with wavy margins. 
S. V. unguiceps (claw-crested). A curious, narrow form, 
dividing into a sort of claw-like crest. 
