NO. 1141. FOS.SJL CYC ADS FUOM THE BLACK HILLS— WAIII). 211 



teristic, tlie light color and soft constitution of the rock, as well as the 

 form and arrangement of the scars, ramentum walls, reproductive 

 organs, etc., distinguish this from all other cycadean trunks. It is a 

 line specimen and weighs 49.9 kg. 



No. 18 consists of two nearly equal branches and one somewhat 

 smaller, arranged in a triangular cluster. Two of them are flat on one 

 side from giowing against uocks. Tiie trunk proper can scarcely be 

 said to be rei)resented. The two larger branches are each about 30 cm. 

 in diameter and 23 cm. long, with rounded summits, forming something 

 analogous to terminal buds. Fractures about the lower portion yield 

 elements of internal .stru<;tuie, but they relate to the branches only. 

 The external surface is beautifully preserved. This sijecimen weighs 

 (JC.22 kg. 



CYCADEOIDEA COLEI, new species. 



Trunks rather large, ellipsoidal, 34 to4<S cm. high, ellii)tical or nearly 

 circular in cros>j section, 30 to 39 cm. in diameter and 90 to 118 cm. in 

 circumference at the thickest i)art, simple, the apex studded with 

 polygonaT small scars and presenting a smooth disk with a central ele- 

 vation; rock substance dark brown in color and moderately heavy; 

 organs of the armor except the very lowest manifestly ascending; leaf 

 scars arranged in two series of more or less distinct .spiral rows, those 

 passing from left to right forming an angle of 75'^ and those from right 

 to left of 4o^ to the vertical axis; scars subihombic, vaiying from 

 almost rhombic to nearly triangular with rounded angles, large, aver- 

 aging 22 mm. wide and 13 mm. high, l»ut ratio of width to height vari- 

 able, empty to a depth of 2 too cm.; ramentaceous walls usually thick, 

 but very variable, doubly grooved or wrinkled, cracked or fissured, 

 often pitted by the scars of small bristles or perulae; fruiting axes 

 numerous, small, most or sometimes all ot their surface occupied by 

 bract scars, central portion correspondingly small, generally cavitous 

 from the disappearance of the essential organs, which appear to have 

 often been immature or abortive: armor about to 7 cm. thick; cor- 

 tical paiencliyma 3 cm. thick; fibrous zone 2 cm., consisting of two 

 rings of wood; medulla about 9 cm. in diameter. 



This is a very handsome species of which the type specimen was pur- 

 chased of Mr. V. 11. Cole, for whom the species is named. That speci- 

 men weighs 03 kg. 



The Yale collection contains nine specimens that I was obliged to 

 refer to this species. These are Nos. 12, 20, 2.5, 28, 48, 52, 57, 08, and 

 80. Of these Xos. 25 and 80 are small and either dwarfed or immature, 

 and Nos. 28 and 52 are small fragments. The rest are fairly typical 

 and furnish good characters. Ko. 48, though small, weighing only 

 29.49 kg., is perhaps the most typical. Xo. 57, though not complete, 

 weighs 50.24 kg., and was doubtless originally quite the equal of the 

 United States National Museum type. No. 12 has an unusual number 

 of fruiting axes. 



