N0> 3.] DESCRIPTION OF SPECIES. 17 



Pityostrobus sp. a. 

 PL II. figs. 9, 10, and (magnified) 9 a, 10 a. 



These specimens, as is generally the case with mesozoic forms, belong 

 to the sub-division Sapinus, which is characterised by thin scales of cone. 

 Thus we can choose between the genera Cedrus, Larix, Abies, Tsuga and 

 Picea, of which the two last must be given the first place, if, on the whole 

 there can be question of any known genus, which cannot be determined from 

 the scanty material available. 



The scales, as previously stated, are thin, and seem to have had an ob- 

 tuse apex. They are furnished with longitudinal striae which curve outwards 

 on either side (fig. 9 a). The specimen fig. 10 shows parts of the scales 

 nearer their base, with indications of impressions made by the two seeds. 



Pityostrobus (?) sp. b. 

 PI. II. figs 11, and (magnified) 11 a. 



Possibly this little specimen may be a young cone, or more correctly 

 the female flower of a species, which belongs to the genus Pinus in a 

 limited signification. The round object presents rather powerful rhomboid 

 impressions, and recalls Strobilites Heeri Nath. from the Jurassic strata 

 of Spitsbergen 1 which Heer, in his day, considered a young Pinus cone. 2 

 On the other hand there might also be the question of some short shoot, for 

 which reason it is with great hesitation I describe the fragment as Pity- 

 ostrobus. 



Pityospermum cf. Maakianum Heer sp. 

 PI. II. fig. 15. 



Pinus Maakiana Heer, 'Beitrage zur Juraflora Ostsibiriens und des Amur- 



landes,' p. 76, pi. 14, fig. 1. 



This specimen agrees so entirely with the seeds of Pinus Maakiana 

 described by Heer, more especially with his fig. 1, that the identity of the 



1 Nafhorst 1. c. p. 20. 



a Heer, 'Beitrage zur fossilen Flora Spitzbergens', p. 45, pi. 9, fig. 7, 8. Flora fossilis 

 arctica, vol. 4-. 



