36 ARKIV FÖR BOTANIK. BAND 13. N:0 7. 



Masculostrobus sp. 1. 



Pi. 6, figs. 9, 10. 



There occur at Kurremölla a number of specimens which 

 may with fairly great confidence be regarded as male strobili 

 of gymnosperms. The preservation of these remains is good, 

 but they are rather fragmentary, and it appears best, there- 

 fore, to refrain from both specific identification with known 

 forms and creation of new specific names. The forms which 

 can be with some confidence distinguished may be described 

 under the generic name of Masculostrobus Seward. 



As Masculostrobus sp. 1 will be described here the spe- 

 cimen in pi. 6, fig. 9, of which the counterpart is also in the 

 collection. The specimen figured is an impression of the outer sur- 

 face of the strobilus. The bracts (sporophylls) appear to have 

 been peltate in shape, but it would seem as if the stalk were 

 attached nearer the lower edge of the tangentially enlarged 

 distal lamina. The latter is somewhat roundedly rhombic to 

 triangular, about 1,5 mm. in diameter, and shows on the 

 impression a distinctly marked furrow, which runs from the 

 lower edge of the lamina to above its centre and evidently 

 corresponds to a ridge on the actual specimen. The stalks 

 of the bracts are seen on the counterpart to be rather slender, 

 but no details of their structure can be made out, nor are 

 there any traces of the pollen-sacs. 



Though no sporangia can be perceived, it is fairly 

 probable that this specimen is a male strobilus. It is 

 possible that it represents a peculiar mode of preserv9.tion 

 of one of the forms described below, but this cannot be 

 decided. There is a certain resemblance to an illustration 

 given by Seward ^ of a male strobilus referred to Pagio- 

 'phyllum Williamsoni (Brgn.) Sew. This has the same shape 

 of the terminal laminae as the present specimen, and also 

 similar longitudinal ridges on their surfaces. As there 

 exists in the Kurremölla flora a form which may be closely 

 compared with another nearly allied species of Pagiophyllum, 

 or Elatides according to tho present nomenclature, viz. E. 

 curvifolia (Dunk.) Nath., it appears fairly probable that 



^ Sewakd, a. C, The Jurassic Flora. Vol. I. 1900. PI. 10, fig. 2 b. 



