20 University Geological Survey of Kansas. 



in longitudinal sections, and passing nearly horizontally across 

 with a more or less upward arching ; dissepiments thin and 

 forming numerous obliquely ascending, small vesicles, in trans- 

 verse sections seen to pass across between the costse with an 

 upward curve. Entire length unknown. " 



In young specimens the cardinal septum and all the other 

 septa on that side of the corallum are very greatly developed 

 laterally after passing inward from the vesicular zone ; the in- 

 ner wall of the vesicular zone is also thickened on that side of 

 the corallum. As a result of this great thickening of the septa 

 the interspaces are small, producing a peculiar appearance in 

 cross-section. The septal development becomes less and less 

 marked as the specimen advances in age, until in old specimens 

 it is hardly noticeable, save in the cardinal septum, though a 

 close comparison generally shows them a little larger on the 

 outside of the general curve. These peculiarities may be seen 

 by sectioning the large and small ends of any adult specimen. 

 The thickness of the dissepimental zone and also the number of 

 tabular dissepiments are very variable. The young specimens 

 are either rather slender or quite turbinate. 



Range and distribution : Kansas City, Jefferson, Douglas 

 and Chautauqua counties. 



Some specimens in the University Museum are about nine 

 inches long and apparently incomplete at both ends. Such 

 specimens are usually a little crooked through the entire length, 



AXOPHYLLUM. 



Milne-Edwards and Haime, Brit. Foss. Corals, pi. XXI, (1850). 



Axophyllum rudis. Plate II, figs. 9-9c. 



Axophyllurn rudis White and St. John, Trans. Chic. Acad. Sci., i, p. 

 115, (1867); Meek and Worthen, Geol. Surv. 111., vi, p. 525, pi. xxxn,ff. 

 6a, b, (1875): White, 13th Ann. Rep. St. Geol. Ind., pt. 2, p. 118, pi. 

 xxtii, ff. 8, 9, (1883): Keyes, Geol. Surv. Mo., iv, p. 107, pi. xn, ff. 5a, b, 



(1894). 



Corallum simple, occasionally clustered by gemmation at the 

 base, turbinate, curved or geniculated, generally attached at 

 the base or side. The outer portion of the calyx is shallow and 

 the central portion is rather deep ; pseudocolumella flattened, 

 moderately prominent, and approaching subquadrate when seen 



