32 



strong carina on the outer curve below, and to give a subelliptlcal out- 

 line to the calyx. Septal fossctte rather large, but variable in size, 

 extending to the outer wall on the incurved side, where it is deepest. 

 Radiating lamellfe strongly defined, somewhat slightly and irregularly 

 curved, numbering at the mai'gin from thirty-two to forty, occasionally 

 uniting in fascicles ; outer wall thin. Surface marked by the usual 

 lines of growth. 



Locality and position, in the lower division of the Burlington Lime- 

 stone, Burlington, Iowa. 



Zaphrentis glans (n. s.) Coral small, general form subglobose ; 

 apex small, prominent ; border of the calyx very oblique ; radiating la- 

 melljB well developed, usually extending above the outer border so as to 

 make the top convex instead of concave, as is usual in this genus. They 

 are from thirty to forty in number besides partially developed ones alter- 

 nating with those well developed. Septal fossette moderately large, but 

 shallow, extending to the outer wall on the outer or most convex side, 

 and deepest near its centre. Outer wall thin, and marked by undu- 

 lating lines of growth. 



Locality and position, in the upper bed of Burlington Limestone, 

 Burlington, Iowa ; where it is frequently met with in a water-worn or 

 eroded condition, giving it a glandular shape. 



Genus Syringopora Goldfuss. 



Syringopora Harveyi * (n. s.) Tubes flexuous, round, usually 

 somewhat radiating, rather closely arranged, connected by not very 

 numerous, rather strong side tubules, and sometimes coalescing ; funnel- 

 shaped prolifers rather numerous, deep, thin. Surface of tubes marked 

 by somewhat strong wrinkles of growth. 



Locality and position, in the Chemung beds, and the lower division 

 of the Burlington Limestone, Burlington, Iowa. 



Genus Striatopora Hall. 



Striatopora carbonaria (n. s.) Coral ramose, very gradually 

 tapering ; cells deep, closely arranged in alternating series opening up- 

 ward; walls thin and somewhat projecting on the lower margins. The 

 general characters of this species seem to place it without doubt in the 

 genus Striatopora of Hall, yet our specimens do not show the interior 

 striation of the cells which is characteristic of that genus ; probably on 

 account of their weathered condition, and the probability that they are 

 outer branches, and were not fully matured. 



Locality and position, in the upper and lower divisions of the Bur- 

 lington Limestone, Burlington, Iowa. 



* Dr. Philip Harvey, Burlington, Iowa. 



