HYDEOZOIDS AND CORALS. 121 



this striations being beset with small spinous processes. Dis- 

 sepiments usually flat or slightly convex, but not unfrequently 

 quite concave, slightly deflected at the margin in front of the 

 longitudinal furrows. Mural pores of medium size, rather 

 numerous. Epitheca considerably wrinkled. 



Horizon and localities — Upper Silurian, Niagara ? oolite: 

 Edgewood (Pike county), and Auburn (Lincoln county). 



Striatopora missouriensis Meek & Worthen. 



Siriaiopora missouriensis Meek & Worthen, 1868: Geol. Sur. Illinois, vol. 

 Ill, p. 369, pi. vii, fig. 4. 



Growths very similar to those of S. carbonaria, but more 

 slender and with the tube openings much less numerous. 



Horizon and localities — ^Upper Silurian limestone : Bai- 

 ley landing ( Perry county ). 



Striatopora carbonaria White. 



Plate xlv, fig. 7. 

 Siriaiopora earhonaria White, 1862: Trans. Boston Soc. Nat. Hist., vol. 

 IX, p. 32. 



Small, slender, dichotomous growths from three to five 

 millimeters in diameter. Tubes very thick-walled, directed 

 obliquely upward and outward; the openings about two mil- 

 limeters in diameter, dilated slightly, with a sharp semi-circular 

 ridge on exterior side. 



Horizon and localities. — Lower Carboniferous, Burlington 

 limestone: Ste. Genevieve, Hannibal; Burlington (Iowa). 



Syringopora harveyi? White. 



Plate xlv, fig. 6a. 



Syringopora harveyi yVhXie, 1862: Proc. Boston Soc. Nat. Hist., vol. IX, 

 p. 32. 



Corallum large, hemispherical. (Jorallites large, rather dis- 

 tinct, wrinkled ; connecting tubules far apart. Otherwise very 

 similar to 8. multattenuata. 



Horizon and localities. — Lower Carboniferous, Keokuk 

 limestone : Boonville (Cooper county). Canton ( Lewis county ), 

 Ourryville (Pike county). 

 G— 9 



