or minutely pitted, with faint lines and granules curved in the direction of the axis and 

 passing into a fine close striation around the micropyle. Tegmen occasionally preserved, 

 adhering slightly to the testa, thin black lustrous, strongly and sharply wrinkled 

 transversely between the rows of large quadrangular cells, which show no stretching 

 longitudinally. 



At Reuver and Swalmen these peculiar boakshaped seeds occur abundantly. 

 They can only be referred to one of the aroids with anatropous ovules, belonging to 

 the section Monsteroideae ; we see no reason for separating them from the living genus 

 Epipremnum. They belong to an extinct species allied to the widely distributed E. pin* 

 natum, which is the only species now extending into temperate regions; the others 

 belong to the tropics. 



The abundance of these fossil seeds makes it probable that they belonged to an 

 aquatic species or to a climbing aroid overhanging the river. Their hardness, small size, 

 and curved polished surface, without angles of any sort, show that they were adapted 

 for dispersal by birds ; but many of them have been nipped in half by birds. 



EPIPREMNUM Sp. 

 PI. IV, figs. 13, 14. 



Two very small seeds of Epipremnum perhaps represent a second species. They 

 are about half the size of E.crassum; but in their shape and thin testa they more resemble 

 the considerably larger seeds of E. pinnatum. 



Length 1.3 mm., breadth 2.2 mm. (we have been obliged to figure these on double 

 the scale of E. cvassum, as they are so small). Reuver. 



In default of more material we do not care to describe this as a different species ; 

 the two seeds may be undeveloped seeds of E. cvassum. 



72 



