GERANIACEAE. 



BIEBERSTEINIA Sp. nov. 

 PL X, figs. 1 a, b. 



Carpel irregularly ovate, triangular in section, hard and bony; ventral surface 

 ridged, with an elongated hilum; coarsely wrinkled, wrinkles radiating from attach* 

 ment; dorsal surface nearly smooth. 



Length 8 mm., breadth 4 mm. Reuver. 



We have only one specimen of this curious fruit. Its narrow attachment (fig. 1 b) 

 seems at first to make a reference to Biebersteinia impossible; but an examination of 

 the dorsal surface (fig. 1 a) shows that the carpel has been crushed edgeways, thus 

 closing the hilum. We do not think that either the fissure on the back or the narrow 

 attachment is original. If we are correct in referring this fruit to Biebersteinia it must 

 represent an extinct species; but in the absence of more perfect material we do not 

 give it a name. 



Biebersteinia is a small genus, of 5 species, growing in west and central Asia. 



ZYGOPHYLLACEAE. 



NITRARIA? 

 PI. X, fig. 2. 



The fruit shown on fig. 2 has a striking superficial resemblance to the endocarp 

 of Nitraria, especially of N. Schoberi; but it is smaller, and if ripe it must have been 

 softer and thinner*walled. Having only one specimen we cannot examine it in section, 

 and a desert plant like Nitraria seems unlikely to occur. 



Length 4.2 mm., breadth 1.8 mm. Brunssum. 



The 3 living species of Nitraria are desert plants of the old world and Australia. 



RUTACEAE. 



ORIXA RETICULATA Sp. nov. 

 PL X, figs. 3-5. 



Carpella duo, ovata, apice acuminata, margine ventrali parum convexa, 

 dorsali valde convexa, nervis reticulatim anastomosantibus in nervum intra* 

 MARGINALEM ad latus dorsale deorsum curvatis. 



Carpels 2, ovate pointed above, ventral margin slightly convex, dorsal margin 

 strongly convex; venation reticulately looped, curving downward into a marginal vein 

 on the dorsal edge ; carpel infolded towards the base on the ventral side, dehiscing 

 along the dorsal and ventral sutures for 1 js of its length. 



Length 5.5 mm., breadth 3.8 mm. Brunssum. 



These fruits certainly belong to the section Xanthoxyleae of the family Rutaceae. 



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