PLEUROCARPI, PERISTOMI. SPIRIDENS. 279 
„stomii exterioris dentes sedecim filiformes, longi, trans- 
,versim striati, rubri; interioris aser. setacei , flavi, hic 
„illic denticulati, basi membranà connexi.“ Hook. Oper- 
culum conico - mëtteg (thesi dimidio brevius. Calyptra 
angusta, cuculliformis 
Obs. Stirpem istam nulli generi bene adscriptam, a 
Neckerà ob membranam basilarem, a Leskià ob Mentel 
lineares, erectos. ab utraque ob cilia abnormia repudiatum, 
ad generis dignitatem extollere invitos methodus jussit. 
Bande m ex wërft caracteribus naturalibus, habitu, ra- 
mificatione, foliorum imbricatione forma serraturisque ut et 
perichaetii indole inter Climacia recipiendam plurimi 
suadebunt; at peristomium internum vetat, cujus v 
omnino peculiaris est, denticulis würginslibus for 
branae tenerrimae quà cilia primordio connexa fnékuill ru- 
dera sistentibus.. Climacii autem pro subgenere si ha- 
beatur, nullus offendar. 
CVIII. S p:I-R I-D EJUS 
Tab X 
Spiridens. Ners v. EsENs. Nov. Act. Phys. Med. 
cad. Caesar. XI. P. TF.-p 443: & ZE feo- h 
ScumwaEGn, Suppl. IT. P.L. p.164. t. CXLIX. f.8— 14. 
STEUD. Nom. Crypt. p. 398. 
GERM. Schneckenzahn. Garr. Helicoide. Spir nimi 
Nomen Neesianum dentes peristomii siccitate in spi- 
ram contortos declarans. 
Caracter essentialis. Peristomium duplex. Ex- 
terius; dentes sedecim C lineares, apice spirali- 
ter torti. Interius, cilia totidem e membraná reticulatà 
subsolida, apice libera conjunctaque, Calyptsą cuculli- 
"Së dés subinaequalis , nulata 
acter sexualis. Flos pikas lateralis, gem- 
‘mifor en — Genitalia mascula .... foeminea plura, unico 
foe SC paraphysibus numerosis setaceis , inaequaliter 
articulat 
Caracter naturalis. Habitus proprius, lycopo- ` 
dioideus, fere Bartramiae giganteae, ind atenus 
