DESCEIPTION OF SPECIES. 85 



FRUITS OF CYCADS. 



ZAMIOSTEOBUS. 



Zamiostrobus Virginiensis, spec. nov. 



Plate XLVII, Figs. 4, 5. 



Cone oblong, elliptical in outline. Scars of the carpellary scales near the bor- 

 ders smaller or indistinct, those towards the central parts having a raised quadrilateral 

 form, the two lower sides of the quadrilateral being longer, the two upper shorter, and 

 making a more obtuse angle with each other than the two lower do. The quadrilateral 

 spaces have in their center an elongated, rhomboidal space which in one form is pro- 

 longed into a line in all the angles except the upper, and in another form has the pro- 

 longations in the lateral and lower angles while the two ujjper sides no longer meet at 

 an angle as in the first-named form, but join' so as to form an arc of a circle. 



Several fragments were found which were plainly impressions of the 

 fructified cone of a zamia-like plant. The scars left by the scales of the 

 cone vary somewhat. Those of the form given in Fig. 4 have the shape of 

 the magnified imprint given in Fig. 4 a, where the rhomboidal space perched 

 on the summit of the quadrilateral area is symmetrical and has all the angles 

 except the upper one drawn out into lines. The other form of scar is found 

 in Fig. 5, and is represented magnified in Fig. 5 a. Here the upper angle 

 of the rhomboidal central area is opened out into the arc of a circle. These 

 impressions were found with Podozamites tenuistriatus, and as this was the 

 only Cycadeous plant found at this locality which could furnish the leaves 

 for the fructification in question, it is probable that both the cone and leaves 

 belong to the same plant. 



Formation and locality. — Found only at the Gowry Shaft, near Midlo- 

 thian. Horizon unknown. 



CONIFERS. 



BAIEBA, Fr. Braun. 



Leaves coriaceous or more or less cartilaginous, narrowed from the base into a 

 rather thick, short, or long petiole, and divided above the basal portion into linear 

 segments, which are themselves split dichotomously into smaller segments which are 

 also linear. Nerves numerous, at long intervals dichotomously divided, and for the 

 most part parallel to one another and to the margins of the laciniae. 



This genus has been placed by Heer and Saporta in the group of the 

 Salisburiae among the Coniferge. The genus is represented in the Virginia 



