176 



SHORTER CONTRTBrTlONS TO GENERAL GEOLOGY, 1921. 



This widespread and characteristic Upper 

 Cretaceous species is fi)iiiid in tiiis countrv 

 from the base of the Karitan formation of New 

 Jersey upward into the Black Creek formation 

 of tlie Carolinas. Abroad it is common in the 

 CVnomanian and ranges upward into the 

 Turonian. The type locality is in the Ceno- 

 manian of Moravia. l>ut the species has also 

 been reconlcd from tlic Atane Ix'ds of western 

 Greenland and from the Dakota sandstone of 

 the West. In the .Vlabania Cretaceous it has 

 been collected only from the lower |)art of the 

 Tuscaloosa formation. 



Several characteristic specimens are present 

 in the collections from Artiiurs BlufT, Te.\. 

 This species was recorded l)y Ward from tlie 

 Cheyenne sandstone at Chatman Creek, Ivans., 

 but the material upon which tlie record was 

 based is referable to the genus Sapindopsis. 



Order UMBELLALES 



Family ARALIACEAE. 



Genus ABALIA Llnn€. 



Aralia wellingtoniana Lesquereux. 



Plate XXXVII, figure 3; Plate XXXVI II, figure.s 3. 4. 



Aralia wellingtoniana Lesquereux, U. S. Geol. Siu-v-ey 



Mon. 17, p. 131. pi. 21, fig, I (pi. 22. figs. 2. 3. is not 



this species but Aralia saportana Lesquereux), 1891 



[1892|. 

 Newl)err>-, U. S. Geol. Survey Mon. 35, p, 114, pi. 26. 



fig. 1. 189.1 [1896], 

 Berr>'. New Jersey Geol. Sur^'ey Bull. 3, p. 202. pi. 



2h, fig. 7. 1911; Torrey Hot. Club Bull., vol. 39. p. 



402. 1912. 

 Aralia concinna Newberry, U. S. Geol. Survey Mon. 16 



IC. p. 114, 1895[1896|. . 

 Aralia wellingloni/ina laughanii Knowlton, U. S. Geol. 



Sur\-ey Twenty-first Ann. Rept..pt. 7, p. 317, 1901. 



This handsome species is descril)ed l)y 

 I>es(|uereux as l)eing palmately three to live 

 lobed, but it certainly seems significant that 

 all the forms from the Raritan formation are 

 three-lolx'd and that the (ivc-lol)ed forms from 

 the Dakota sandstone referred by Les<|uereu.\ 

 to this species are indistinguishable from his 

 .species Aralin Mnporlonn, which occurs at the 

 same horizon and. in part at least, at the same 

 locality. 



'lliis is the most abimdant form collected at 

 Arthurs BlufT, Te.\.. there being 15 specimens 

 in the one small collection made by Stanton 

 and St^'phenson and as miuiy more in the old 



collections made by Hill and \'aughan. These 

 are all trilobate, and the majority liave toothed 

 nuu'gins and agree exactly witii tiu' Karitan 

 leaves of this species and with tiu> trilobate 

 leaves frcuu the Dakota sandstone like the one 

 figured l)y Les(|uereux on his Plate XXI, 

 figure 1. 



In the light of our present knowledge Aralia 

 welliinitoiild may be redescribed in tlie following 

 terms : 



Ijcaves variable in size, 10 to 20 centimetei"s 

 in length by S to lo centimeters in maximum 

 width from tip to ti|) of tiie lateral lobes; 

 average size about 15 centimeters in length by 

 11 centimeters in wiiltli: coriaceous, palmately 

 deeply trilobate, with a rapidly narrowed and 

 more or less extended decurrent base; lobes 

 long, lanceolate, widest in the middle and 

 narrowing below, somewhat abruptly acumi- 

 nate, the medium slightly the longest, diverg- 

 ing at an angle of about 30°, sepiraled by 

 sinuses extending more than halfway to the 

 base, narrowly rounded: margins entire below 

 and for varying distances upward, sometimes 

 throughout, generally passing gradually into 

 dentate-serrate teeth, one to each secondary 

 or less, prominent in some sj)ecimens, where 

 they arc mor(> or less extended and directed 

 upward, separated by wide, shallow sinuses. 

 Primaries stout, suprabasilar, the median 

 slightly larger than the laterals. Secondaries 

 numerous, thin, regular, subparallel. ascending, 

 as the angle of their divergence from the 

 primaries averages about Xl^. luit slightly 

 curved in tli(>ir course, ultimately craspedo- 

 drome in the distal parts of tlie leaf, \vlii>re the 

 margin is idoilicd. and < ani|)t(idr()nie in the 

 basal half of tlie leaf, wiiere (lie margin is 

 entire. .Vreolatioii indistinct, reticulate, of 

 r|uadragonal or polygonal meshes. The smaller 

 leaves are relatively shorter and broader, 

 with less extended lobes and more open and 

 less deep sinuses. 



The present species was confused by Ward'" 

 with what was subsequently dilferciil iated 

 as Aniliii coltoiKldli iisis Berry,'" of the Tus- 

 caloosa formation, which has shorter, more 

 conical lobes, a broadly roundi'd base, and 

 more crenate marginal teelh. 



•■ Wuril, L. F., In Smith, E. A., neology of Uic C<Niitnl IMslii o( 

 .VInhuiim, p. MS, INM, 



" Horry, K. W,, V. S. (lool. Survey Prn( r'api-r Mi, \<. lix, pi, K. 

 Il|{i>, I 3, IDIU. 



