099 | REVUE BRYOLOGIQUE 
very rudimentary and irregular, consisting of a few pale, obtuse, 
papillose teeth, to about 0,035 mm. long. Spores rather variable in 
= size 0,016 to 0,023 mm. in diameter, brownish red, papillose, 
- occasionally atrophied or developed only in very small numbers 
round the columella. 
_ Hab. : Pinhay Cliffs, Lyme Regis, Dorsetshire Miss Lister and 
24: 4 Dixon. — Boxley Warren Maidstone, Kent, J, Marten., — 
 Shoreham, Kent, Sir J. Stirling, E. M. Holmes, W. E, Nicholson.- 
Lewes, Sussex, W. E. Nicholson. 
Weisia crispata Ldb. © X W. crispa Mitt. ©, — The vege- 
_ tative plant and the inflorescence are those of W. crispata. 
Capsule ovalto elongate-elliptic, 4,35 to 14,55 mm. long with 
the operculum and 0,45 to 0,55 mm. broad, pale brown on a pale 
_seta of variable (length to about 2,3 mm.) raising the capsule well 
above the leaves, but distinetly shorter than that of W. crispata : 
… Operculum 0,55 to 0,70 mm. long, persistent for a long time, but 
_ dehiscing at maturity with a little pressure : Calyptra rather 
large : Cells of the exothecium thinner-walled and rather wider 
than those of W. crispata, but more elongated than those of 
 W. crispa 9 x W. crispata © and irregular both in size in the 
_ thickness of the cell walls, 0,043 to 0,095 mm. long by 0,025 
to 0,035 mm. broad : Stomata larger and better developed than 
those of the hybrid W. crispa o >x W. crispata œ, but not s0 
_ well developed nor so numerous as those of W. crispala : Spores 
absent or consisting of a few undeveloped hyaline cells string 
_ round the columella. 
Hab. — Boxley Warren Maidstone, J. Marten and Lewes, 
Sussex, W. E. Nicholson. 
Although I have claimed above the wo mosses as affording 
an example of reciprocal hybridity, the results in the two cases 
_ are widelÿ different. The fertilization of W. crispa à X W. cris- 
_ patla œ appears to be the more successful cross, as the capsules 
are well developed and spores are produced, while in the other 
case the capsulés have an undeveloped appearance and I have 
_ not been able {o discover any sound spores. In both cases the 
_ influence of the mother plant predominates in the general 
_appearance of the capsule, though in important characters the 
influence of the fertilizing plant is very apparent. Thus in the case 
of the hybrid W. crispa x W, crispala the influence of 
_ W. crispala is seen in the elongated seta, the more elongat 
= form of the capsule and its brighter colour,the dehiscent opereu- 
= lum, the rudimentary peristome and slightly thicker walls of the 
“: cells of the exothecium, while in the hybrid W. crispalax W. crispa 
