COJflOPIEBIS. Ill 



13,498. A long pinna witli some unusually large pinnules of 

 the type of Fig. 5, PI. XVI. 



Gristhorpe Bay. Presented ly Br. Murray. 



39,242. Labelled by Bean Pecopteris Mwrrayana ; the specimen 

 consists of a rachis bearing long, acuminately tapering, linear 

 pinnse, with large pinnules intermediate in shape between the 

 shorter and more rounded and the longer and more pointed type. 



Scarborough. Bean Coll. 



39,265. Part of a fertile pinna with pinnules identical with 

 the type - specimen of Bunbury's Sphenopteris nephrocarpa, the 

 lamina being rather less reduced than in such a form as that 

 of Fig. 8, PI. XVII. 



Pean Coll. 



39,269. An imperfect specimen labelled by Bean Tympanophora 

 simplex, and no doubt identical with the form figured by Lindley 

 and Hutton and by Phillips. The axis of the partially preserved 

 pinna bears segments reduced to a single sorus, accompanied in 

 «ome cases by a short sterile lobe, exactly as in the slightly 

 smaller example shown in PI. XXI. Fig. 3. The best specimen 

 ■of T. simplex is in the Leckenby Collection, Cambridge. This 

 shows part of a rachis with fertile pinnae bearing pinnules with 

 single cup-shaped sori ; some of the pinnules, however, bear two 

 ■or more sori, as in PI. XXI. Fig. 3. In the typical T. simplex 

 fragments the single sori are larger than the sori which are borne 

 two, three, four, or five together on the same pinnule, and as 

 a rule the single sorus is accompanied by a narrow sterile 

 segment. 



Lower Shale, Scarborough. Pean Coll. 



40,467a. An indistinct impression on sandstone, illustrating 

 the occurrence of a few fertile pinnules of the Tympanophora 

 raeemosa type with the small sterile pinnules — like those in 

 Fig. 1, PI. XX. — of the Thyrsopteris Maakiana type. 



Scarborough. 



52,545. Part of a fertile frond, in which the lamina of the 

 segments is considerably reduced, but not quite so much as in the 

 specimen shown in Fig. 8, PI. XVII. 



Lower Shale. 



