﻿326 ME. E. A. NEWELL ARBER ON THE [Ma J' I905, 



scarcely visible to the naked eye. These are the clusters of 

 sporangium-like bodies. Enlarged drawings of some of these 

 organs are shown in PI. XXX, figs. 1 & 3 & PI. XXXI, fig. 3. 



The scale-fronds have a bluish tint, which is a natural feature. 

 A group of these fronds, somewhat flattened, occurs at one angle 

 of the specimen, of which the largest is 1*7 centimetres long, and 

 about 1 cm. broad at its widest part. Close to them, a considerable 

 number of the sporangium-like bodies are scattered over the surface 

 of the shale, some of which are represented in PI. XXX, fig. 1, 

 and PI. XXXI, fig. 3. Smaller portions of scale-leaves are also 

 found, some of which appear to show the prints, or scars of 

 attachment of the sporangium-like bodies, and some fragments 

 of these organs possibly still in continuity. The best example is 

 figured in PI. XXX, fig. 4. Several other groups of these organs 

 occur on the same specimen, in close proximity to scale-leaves, of 

 which that figured in PI. XXX, fig. 3 is a typical instance. 



V. 7211 is a similar specimen, in the same collection, 

 and from the same locality. — It is a triangular piece of 

 pinkish scale, on which are to be found twenty or more examples 

 of the scale-fronds, and a few fragments of the larger fronds. 

 Associated with the scale-leaves, numerous scattered groups of 

 the sporangium-like bodies may be observed, of which two speci- 

 mens are figured in PI. XXX, fig. 2 and PI. XXXI, fig. 4. 

 There also appears to be some evidence, though not very distinct, 

 of scars, possibly the scars of attachment of these organs, on some 

 fragments of the scale-fronds. 



39,149 is another, and similar piece of shale, in the 

 same collection, and from the same locality, which shows 

 several, nearly-perfect specimens of the larger fronds, and a good 

 example of a strongly-convex scale-frond, as well as other less 

 perfect fragments of the scale-leaves. The groups of sporangium- 

 like bodies are fairly well-preserved, but are not perhaps quite so 

 satisfactory as in the previous specimens. In one instance, a small 

 portion of a scale-frond appears to exhibit one or two scars, 

 possibly the prints of attachment of these organs, and also several 

 sporangium-like organs have the appearance of being still in con- 

 tinuity, but, in this case, the evidence is less trustworthy than 

 that of the previous specimen (PI. XXX, fig. 4). Many of these 

 sporangium-like bodies, in this as in other specimens, have opened 

 or dehisced (PI. XXXI, fig. 1). The inner surface is strongly 

 concave, and may be distinguished from the outer by the fact 

 that the cell-walls of the inner limiting-layer are much less 

 conspicuous. The detached sporangium-like organs often occur 

 in groups (PI. XXXI, fig. 2), arranged as if several were borne 

 together in a cluster or sorus. 



No. 65 in the Sedgwick (Woodwardian) Museum, Cam- 

 bridge (Foreign Plant-Collection), was obtained from the 



