76 



MATONIDIUM. 



39,254. PI. XI. Fig. 1. 



A fairly large specimen, a portion of which is shown in Fig. 1 to 

 illustrate the origin of about ten fertile pinnae from the summit 

 of the petiole. The leaf is preserved with the upper face exposed, 

 the sori appearing as two rows of circular elevations. In some 

 places where the carbonaceous film has heen removed there appear 

 to be indications of the individual sporangia, but these are not 

 at all clear. The small basal pinnules are well shown. Labelled 

 by Bean Pecopteris multicaulis. 



Lower Shale, Scarborough. Sean Coll. 



52,594 and 52,605. PI. XI. Fig. 2. 



This fragment shows the short rounded pinnules on the basa. 

 portions of the pinnae, and illustrates the occurrence of sori on 

 even the smallest segments. In Matonidium Goepperti, as in 

 Matonia pectinata, all the segments of a frond appear to be fertile. 

 The figure represents the sori as circular elevations, with a central 

 depression, projecting from the lower surface of the pinnules. 



Haibum Wyke. Morris Coll. 



A )f " &r B 



FIG. 7. Matonidium Goepperti (Ett.). 



A. Portion of a pinna, showing the sori. 



B. The tip of a circinately coiled leaf. (No. 52,596.) 



52,596. Text-fig. 7. 



Fragments of fertile pinnae in ironstone, showing both upper and 

 lower surfaces. In the enlarged piece shown in the Text-figure (A) 

 the under surface is uppermost, bearing two rows of crowded 

 elliptical sori. The circinately coiled leaf (Fig. 7, B) preserved in 

 the same piece of rock belongs probably to this species ; it agrees 

 exactly with the closely coiled frond of the recent species, Matonia 

 pectinata, 



Oolitic Shale, Haiburn Wyke. Morris Coll. 



