Johnson & GtIlmore — Dewalquea in Coal-bore at Washing Bay. 327 



many other examples of the genus in the core between 897-913 feet, as well 

 as at 787 feet. One leaf shows three leaflets, and may be named D.fraocinifolia 

 (PI. XI, fig. 4). Another apparently snnple leaf we propose to call D. denti- 

 culata (PL XI, fig. 11). Most of the other specimens — some twenty in all — are 

 fragments of leaves only. They all show the Dewalquea type of tissue, and 

 indicate that it was common in the locality. 



Affinities of Beivalquea. 



The discovery of Beivalquea was made by Debey in the Senonian (Upper 

 Cretaceous) of Westphalia. He appears to have sent specimens and drawings 

 to Saporta and Marion (2), then at work on the Belgian Tertiary flora, and 

 also to Schimper (3). Debey's MS. name of Araliophyllum, accepted by 

 Schimper, was not, however, adopted by Saporta and Marion, who replaced it 

 by Dewalquea (after the Belgian geologist), three specimens being described — 

 D. haldemiana S. and M. and D. aquisgranensis S. and M. from "Westphalia, 

 and D. gelindenensis S. and M. from the basal Eocene of Gelinden. Since 

 1874 other species have been described, of which Berry (4) gives a useful 

 critical revision. They are all, with one exception, from the Upper Cretaceous, 

 and are from America. One of the species, D. Smithi, is founded by Berry on 

 inaterial from the Tuscaloosa (Upper Cretaceous) beds of Alabama. D. Smithi 

 is very similar to, but distinct from, D. insignis Hosius and von Marck from 

 Haldem (Westphalia) (6). It differs from all previously recorded American 

 species in being quinate, not ternate. It is similar to D. coriacea and 

 D. pentaphylla, found by Velenovsky (6) in the Cenomanian of Bohemia. 

 Knowlton (17), in 1917, described a second quinate specimen D. pulchella, 

 which he considered closely allied to, if not identical with, D. insignis H. and 

 von M. Dewalquea is an extinct type of leaf derivable from or of the same 

 type as Polytaenia quinquesecta of the Turonian. It occurs in the Upper 

 Cretaceous from Alabama to Greenland, in Westphalia and Bohemia, the 

 Lower Eocene of Gelinden, in Belgium, and in the Oligocene of Italy. The 

 recorded distribution in time and space adds considerably to the interest of 

 the discovery of a Devxdquea in the coal-bore at Washing Bay. If the deposit 

 be correctly referred to the Upper Oligocene, the Irish specimen may 

 represent the last trace of the genus in time. The five-lobed form (PI. XI, fig. 1) 

 is closely allied to D. Smithi Berry. The chief obvious difference is the 

 smaller outer leaflets of the Irish specimen. Berry shows a craspedodrome 

 venation in his restoration, but in his description says it may be camptodrome. 

 Our five-lobed specimen is camptodrome, and is more comparable to the 

 small specimen of D. insignis H. and von M. {op. cit.). It is unfortunate that 

 Deivalquea is known by its foliage only (in many cases fragmentary), and 



