This fruit is nearer to C. lutetiana than to C. quadrisulcata (North Asia, China). 

 It differs from both chiefly in its much thicker pedicel, which is more strongly ribbed 

 than in G lutetiana, and also in the way the fruit gradually tapers into the pedicel. We 

 have only seen one specimen. 



HALORRHAGACEAE. 



PROSERPINACA RETICULATA Sp. nov. 

 PI. XIV, figs. 14-19. 



Fructus nervis conspicuis reticulatis ornatus. 



Fruit a trilocular utricle (fig. 16) or nut, winged at the corners, and formed of 

 combined perianth and ovary, trigonous broad below narrowed above, open at the top 

 (by decay), showing 3 septa opposite the flat faces; sepals with a conspicuous midrib, 

 stronger marginal rib spurred at rightsangles (to support a membranous wing at the 

 corners, as in Halorrhagis?}, and large open loops; veins prolonged considerably beyond 

 the aperture (fig. 14), indicating a long herbaceous calyx limb which has now decayed. 



Length (including remains of crown of veins) 3 mm., without crown 1.7 mm., 

 breadth (without wings) 1.6 mm. Brunssum, Reuver, Swalmen, Bidart. 



This peculiar nut evidently belongs to the genus Proserpinaca, now exclusively 

 American. The two living species are submerged aquatic plants resembling Myriophyllum 

 and Hippuris. 



The new species in its sculpture is strikingly different from either of the living 

 forms (compare fig. 20) and in its winged or spurred angles it curiously resembles 

 certain species of Halorrhagis (cf. H. alata). It is, however, evidently an aquatic plant. 

 It occurs at all three localities in the Reuverian, and Professor Jules Welsh has also 

 sent us specimens (figs. 18, 19) from a Pliocene deposit at Bidart, near Biarritz. 



MYRIOPHYLLUM VERTICILLATUM Linn. 

 PI. XIV, fig. 21. 

 Fruits indistinguishable from this species occur at Reuver; they are very rare. 



HIPPURIS GLOBOSA Sp. nov. 

 PI. XIV, figs. 24a, b. 



Fructus globosus, endocarpio crassissimo. 



Fruit globose or globosely ovate; mesocarp thick of many layers of spongy cells; 

 epicarp wanting, but the impressions of large irregular cells can be seen on the outer 

 surface of the mesocarp; endocarp composed of a single layer of thin shining cells 

 having a shagreen*like appearance on its inner surface; seed*coat thin black shining 

 continuous with a mass of loose tissue which fills the aperture of the fruit like a plug. 



Length 1.8 mm., breadth 1.4 mm. Reuver. 



123 



