Bower.—Studies in the Phytogeny of the Fi lie ales. VIII. 3 5 1 
gradate sequence interspersed with curved hairs of the same nature as those 
seen in Loxsoma} The general likeness of the sori makes only the more 
striking the difference of their sporangia both in form and as regards 
dehiscence. Their form in Loxsomopsis is pear-shaped, though less 
markedly so than in Loxsoma. The stalk is short, and consists of about six 
rows of cells (Fig. 4). The basal face is here less convex and smaller in 
proportion, but the distal face is larger and flatter than in Loxsoma. Accord- 
1 
3 
Fig. 1. Part of pinna of Loxsomopsis notabilis seen from below, showing two pinnules each with 
a sorus arising from an anadromous vein : in position and structure they closely resemble those ot 
Loxsoma. x io. 
Fig. 2. Bases of hairs of Loxsomopsis notabilis of different structure, in juxtaposition on surface 
of rhizome. The ends of the hairs were broken off short in preparation. x ioo. 
Fig. 3. a = soft hair from leaf. b = stiff bristle with enlarged base from the rhizome. 
After M. Slosson. 
ingly the annulus, which here also may be recognized as a complete ring, 
appears nearly vertical. Its cells are indurated round fully three-quarters 
of the whole ring. The number of its cells is about 40, or less, and about 
twelve of these in an obliquely lateral position are relatively narrow and 
thin walled. The actual rupture takes place about the middle of a group 
of eight cells which constitute the stomium. 
The position of the stomium and of the slit of dehiscence is lateral. 
1 See Bower: The Ferns, Cambridge Press, vol. i, 1923, Fig. 206. 
A a 2 
