q 
Bi 
q 
8 
376 BOTANICAL GAZETTE [may 
driopsis tenuissima, Champia parvula, Rhabdonia tenera, Gracillaria 
multipartita. All the species are in fruit, and the two latter with both 
tetraspores and cystocarps ; cystocarps in the other Floridez. 
Bryophytes——Antheridia and archegonia and development of the 
sporogonium in Marchantia polymorpha, Conocephalus conicus, 
Preissia commutata. . Antheridia and archegonia in Pellia endiviaefo- 
lia, Pallavicinia lyellii. Development of sporogonium in Aneura sp., 
Ptilidium ciliare, Cephalozia curvifolia, C. multiflora, Lophocolea 
heterophylla. Antheridia and archegonia of Mnium affine and cuspi- 
datum. 
Ferns.—Sporangia of Pteris albolineata, Aspidium falcatum, Ono- 
clea struthiopteris. 
Living material of the ferns is kept in the green houses for com- 
plete studies of development, and here the students have practice in 
methods by carrying the material through all stages of preparation. 
The same thing is done by them in other groups also. Quantities of 
other material fixed in various ways are kept at hand in alcohol. 
Material imbedded in paraffin has not been kept a sufficiently long 
time to determine the value of this method in the storage of material 
ready for sectioning, but it may be kept in cedar oil ready for infil- 
tration.— Gro. F. ATKINSON, Cornell University. 
