CARYA ANGULATA Sp. nov. 



PL IV, figs. 28, 29. 



Endocarpium ovoideum, utrinque angustatum et apiculatum, costis pluribus 

 longitudinalibus acutis instructum. 



Endocarp ovate narrowed and pointed above and below, with several sharp 

 longitudinal ribs. 



Length about 30 mm. (5 broken specimens). Reuver. 



This fruit somewhat resembles C. alba and is of about the same size; but it is 

 narrower below, much more strongly ribbed, and does not show the reticulating grooves 

 or the small tubercles seen on the exterior of the endocarp in C. alba. From the living 

 C. olivaeformis it is clearly distinguished by its pointed shape and sharp ribbing. 



Our fossil agrees closely with one of those figured by Kinkelin * as Carya olivae* 

 formis Nutt. fossilis Kink. (fig. 17), but it is quite unlike the other specimens figured 

 under the same name (figs. 12 — 16, 18). We doubt if all his figures can represent the 

 same species. Like our fossil, Kinkelin's fig. 17 is strongly ribbed and pointed at either 

 end. His other figures, and to these his descriptions specially apply, represent long^oval 

 blunt*pointed nuts resembling the living C. olivaeformis. All our fossils show the sharp 

 angles and pointed end — we have seen nothing in the Reuverian approaching to 

 C. olivaeformis. 



The Reuver material is not very satisfactory for description, but as it represents 

 a well*marked Pliocene form, which appears to be common to Limburg and Austria, 

 and is unlike any described species, we name the Reuver fossil C.angulata, and refer 

 to this species also Kinkelin's fig. 17. We cannot employ Kinkelin's term fossilis, for 

 this he applies not only to forms of C. olivaeformis but to two other quite different 

 species; he does not use fossilis in a varietal sense, and he had long previously applied 

 the term fossilis to C. ovata. 



BETULACEAE. 



CARPINUS BETULUS Linn. 



PI. IV, figs. 30—33. 



Fruits of this species occur in profusion at Reuver and Swalmen, and a smaller 

 number are found at Brunssum. They vary greatly in size, but in no essential character 

 can they be distinguished from the living form. The four nuts figured show the range 

 of variation, but these seem to be connected by numerous intermediates, and all attempts 

 to separate two species have failed. We have seen no fruiting bracts. 



* Engelhardt und Kinkelin, Oberpliocane Flora und Fauna des Untermaintales. Abh. dev 

 Senckenbergischen Naturforschenden Gesellsch. Bd. 29, Heft J, PL XXX. 



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