92 Cincinnati Society of Natural History. 



distributed ; surface irregular and rough, showing numerous 

 minute pores and a greater or less number of oscula. (Jour. 

 Cin. Soc. Nat. Hist., vol. 7, 1884, p. 140.) 



Locality. — Ludlow, Ky., etc. 



Remarks. — This species occurs under both a parasitic and a 

 free form. The presence of small pores and larger oscula at 

 the surface, will serve to distinguish it from the others 

 described. 



7. — S. HiNDKi, Nichol-son, 1874. 



There is a specimen of the present genus in the collection 

 of the U. S. National Museum without a name which has 

 man}' of the characters of .S. Iiindci. It is massive, and only a 

 fragment of a large specimen. The polished section does not 

 show the large oscula said to be one of the characters of 5". 

 /ti)id('i. The lamime are very sinuous, and close together, 

 averaging about five to a line. A portion of the outer surface, 

 which is still preserved, shows rounded monticules, not very 

 prominent. A condensation of the original description of Dr. 

 Nicholson is given below to serve for identifying the species, 

 should it actually occur in the Cincinnati Group. 



Fossil forming thin crusts, or hemispheric masses, com- 

 posed of concentrically dispo.sed strata, each made up of cal- 

 careous laminae separated by interspaces ; lamiuse sometimes 

 connected by transverse pillars, but more commonly bent and 

 curved so as in inosculate, thus giving the whole a vesicular 

 appearance ; about 8 laminae in one line ; upper surface shows 

 linear openings, and also large rounded or oval canals from a 

 line to a line and one-half in diameter. (Ann. and Mag. Nat. 

 Hist., 4th ser., vol. 13, 1874, p. 12.) 



Locality. — Richmond, Ind. 



Remarks. — ^. //zV/rt'r/ is stated b\- Nicholson to be from the 

 Niagara group, and it is, of ctnirsc, i)ossibk- that the form under 

 consideration is not that species. 



8. — vS. INDIANMKN'.SIS, U. Sp. 



There is a second specimen of Stromato/)ora in the U. S. 

 National Museum, also without a name. This is a massive 

 species, about 8 inches long, 6 inches wide and 5 inches high. 

 The monticules are very numerous and <|nile large and jiromi- 



