28o WARD 



lection, they resemble each other in all the main points. No. 500.28 

 is smaller and more compressed, and is mostly black on the outer sur- 

 face, but the outer coating has pretty much entirely disappeared and 

 the leaf scars are clearly exposed. The fracture at the base also re- 

 veals some very definite internal structure. No. 500.31 shows much 

 less but so far as visible the characters are the same. The former 

 weighs 2.33 and the latter 3.97 kilograms. The specific name refers 

 to the somewhat negative and meager character of the specimens. 



CYCADELLA CONCINNA n. sp. 



Trunk small (12cm high, 14x15cm in diameter), irregularly and 

 obliquely short-conical, somewhat vertically compressed, unbranched, 

 broad at the concave base, terminating in an imperfect bud ; rock soft 

 on the surface, harder within, dark colored or bluish except a light 

 weathered area, the specific gravity above the normal ; organs of the 

 armor at right angles to the oblique axis ; rows of scars from left to 

 right making an angle with the axis of 75°-8o°, those from right to left 

 of 30°-40°; leaf scars narrowly subrhombic, very small, 1 2-1 3mm 

 wide, 3-5mm high; leaf bases dark, firm but porous; walls 3-5mm 

 thick, of denser structure than the leaves, lighter colored, sometimes 

 with darker stripes; reproductive organs doubtful and practically 

 wanting; armor 2cm thick, joined to the axis by a definite line; wood 

 3cm thick, undifferentiated; medulla elliptical, 3x6cm thick, smooth 

 and homogeneous. 



It has been necessary to regard the nearly perfect, compact, and 

 rather handsome little trunk No. 500.16 as constituting a species by 

 itself, and it is much to be hoped that other specimens of the same 

 may be found. It weighs 2.18 kilograms. 



CYCADELLA CREPIDARIA n. sp. 



Trunk small, elliptical in cross-section, much vertically compressed, 

 having the form, when inverted, of a shoe or moccasin, having a 

 height (thickness) of 7cm, a width (lesser diameter) of 12cm, and a 

 length (greater diameter) of 19cm, with two lateral axes nearly at 

 right angles to the primary axis, the terminal bud forming a large 

 raised area, the base projecting downward in a rounded protuberance ; 

 rock soft and coarse-grained, dark brown or nearly black, bluish 

 within, of low specific gravity; organs of the armor mostly appressed 

 or concealed ; leaf scars where visible distorted and abnormal in shape, 

 subelliptical, I2-I5mm wide, 4-5mm high; leaf bases coarse and 



