ANTHOZOA. 



55 



Genevieve County. As with many Devonian corals the figures and specific descriptions 

 are incomplete and without comparison with the types specific identification is somewhat 

 uncertain. Figures 3 and 4 show the structures inside the tubes of a Callaway lime- 

 stone specimen. Rarely tabulae cross the tubes. About 12 spines appear in some cross 

 sections. 



Fig. 5. Sections of Ceratopora snyderensis n. sp. 



1. Cross section (X2}^). 



2. Vertical section (X2}4). 



(Snyder Creek shale of Callaway County.) 



Sections of Favosites Limitaris Rominger. 



4. Vertical section of an ordinary specimen showing spines (X10). 

 3. Cross-section of ordinary corralites showing spines. Some of the spines are 

 cut diagonally so that they do not show connection with the walls. (X10.) 



Family Auloporidae 



Genus Aulopora Goldfuss 



Aulopora repens Knorr and Walch 



Plate 4, figure 4. 



1775. Melliporites repens Knorr et Walch, Rec. des mon. catastr. t. Ill, p. 157, sup. 



pi. 6, fig. 1. 

 1829. Aulopora serpens Goldfuss, Petref. Germ., vol. I, p. 82, pi. 29, fig. 1. 

 1857. Aulopora repens Milne-Edwards and Haime, Pqjyp. Foss. des Terr. Pal., p. 312. 

 1876. Aulopora serpens Rominger, Geol. Surv. Mich., Ill, pt. II, pp. 87-88, pi. 33, 



fig. 2. 

 1911. Aulopora serpens Cleland, Bull. 21, Wisconsin Geol. Nat. Hist. Surv., p. 34, 



pi. 2, fig. 4. 

 1913. Aulopora repens Clarke and Swartz, Maryland Geol. Surv., Middle and Upper 



Devonian, p. 542, pi. 45, figs. 10, 11. 

 Clarke and Swartz's description — "Corallum tubular, prostrate; branching from buds 

 which originate below calyx; dichotomous, or branches anastomosing to produce a 

 loose meshwork. Branches funnel-shaped, attached throughout their length to other 

 organisms, especially to brachiopods. Calyx funnel-shaped, directed upwards. Tab- 

 ulae and septa absent. 



Diameter of branches at calyx 2 mm.; at base 1 mm.; length of branches 3-5 mm." 

 Remarks — Aulopora repens is of common occurrence in the Snyder Creek shale and 

 is nearly always on Stropheodonta demissa or Stropheodonta callawayensis. 



