ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 99 



The genera belonging to the first tribe are characterized as 

 follows, viz. : — 

 Gtmnoqramme^. Ehizoma repens, setosum, setis basi affixis; sori 



exindusiati ; petiolus rhizomate continuus ; nervi apice non incras- 



sati (excl. gen. Cheiropleuria). 



A. Fasciculi vasorum petioli 1-3 ; paraphyses sporangiis admixtse 



s. pedicellis sporangiorum insertae. 

 a. Sori Gymnogrammes. 



1. Aspleniopsis. Sori nervorum partem occu- 



pantes. 



2. TricMogramme. Sori omnes nervorum partes 



occupantes. 

 (3. Sori costae paralleli, medii inter costam et 

 marginem. 



3. Tcenitis. 

 y. Sori Acrostichi. 



4. Platytcenia. Folia pinnatisecta, segmenta 



maculis Doodyce. 



5. Cheiropleuria. Folia indivisa s. dichotoma, 



nervi flabellati ramis Drynarice maculis 

 junctis. 



B. Fasciculi vasorum petioli 1 s. 2 ; paraphyses nuUae ; sori 



Gymnogrammes. 



6. Psilogramme. Folia in costis nervisque hir- 



suta ; sori e basi nervorum versus apicem 

 decrescentes. 



7. Gymnogramme. Folia glaberrima; sori apicem 



nervorum occupantes. 



C. Fasciculi vasorum petioli 2 ; paraphyses paucee ; sori apicem 



nervorum occupantes. 



8. MonacJiosorum. 



Aspleniopsis contains 1 species (Polynesia) ; TricMogramme 11 

 sp. (S. America, E. Indies, Polynesia) ; Tcenitis 1 sp. (Tropical Asia 

 to Japan) ; Platytcenia 1 sp. (Philippines) ; Cheiropleuria 1 sp. (China, 

 Japan) ; Psilogramme 33 sp. (S. America, Tristan d'Acunha) ; Gymno- 

 gramme 4 sp. (1 occurring in Europe) ; Monachosorum 1 sp. (E. India, 

 Java). 



Of the remaining tribes Lindsayese includes Lindsaya (43 sp.) ; 

 Schizoloma (25 sp.) ; Wihelia (3 sp.) ; Odontosoria (3 sp.) ; and Lind- 

 sayopsis (3 sp.) ; Lonchitidese includes Histiopteris (2 sp.), Lonchitis 

 (6 sp,), Pteridium (Pteris 1 sp.), Antiosorus (2 sp.), and Paesia (5 sp.) ; 

 and MicrolepiesB or Dennstaedtieae comprises Hypolepis (14 sp.), 

 Microlepia (15 sp.), Leptolepia (4 sp.), and Dennstaedtia (24 sp.). 



Development of the Spores of Salvinia.* — According to E. Hein- 

 richer, the octant-cells in the sporocarp of Salvinia are the mother- 

 cells of the spores, of which there are therefore only eight. The 

 octants of one half of the archespore occupy such a position with 

 respect to those of the other half, that the walls which separate the 

 * SB. K. K. Akad. Wiss. Wien, Ixxxv. (1882) pp. 494-522. 



H 2 



