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Apothecia prominula, depresso-globosa, perithecio atro, amphi- 
thecio incolore 1]. dein nigricante, paraphysibus capillaribus. Spore 
oblongo-ovoidee 1. oblong, e simplici bi-quadriloculares, incolores. 
Spermatia oblonga; sterigmatibus simplicibus. Thailus hypophle- 
odes epiphyllus, in crustam tenuem subinde effiguratam demum 
confluens. 
At the very limits of the tribe, and of the class in this direction, 
Strigula offers forms so elegant that we may well at first hesitate as to 
their realrank. Segestria epiphylla, as it grows on the leaves of Cuba, in 
the midst of the curiously varied forms of Strigula Féei and S. nemathora, 
looks rather like a crustaceous lichen environed by effigurate ones; and it 
needs a second thought to recognize the former as in fact the higher. We 
owe to Montagne a full explication of this curious type; and to Dr. Nylan- 
der (1. c.) the more important results of later criticism. 
Five species were described by Montagne in the Plantes Cellulaires of 
Cuba; and this number was afterwards increased, from other tropical 
regions, by the author of that work, to eight. Three of these have been 
well united by Dr. Nylander; and one (8S. rotwla, Mont.) which, if I do 
not err in considering it represented in Mr. Wright’s collections, may be 
said to combine the thallus of Strigula with gymnocarpous, lecanoroid 
apothecia, has been referred, by the same lichenographer, to Platygrapha. 
Except the very doubtful S. Babingtonii, Berk., found on Box and Laurel 
leaves in England, and since relegated to Fungi by its original describer, 
the group is a tropical one; one species appearing however within our 
limits. 
S. complanata (Fée, Mont.) Nyl. (S. Féei & complanata, Mont.). On 
the leaves of Magnolia grandifiora ; middle Alabama (Mr. Beaumont, 
comm. Curtis) and Houston, Texas (Mr. Ravenel). The more or less 
oblong-ovoid spores of this lichen are colourless ; but suggest a compari- 
son with the decolorate spores of Pyrenwla sect. Arthopyrenia. 
