Cincinnatian and Lexington Fossils 87 



surface. As in other species described from the same rocks, the 

 surface is ornamented by small granules or papillae. These are 

 rather coarse, and vary greatly in number and size in different 

 parts of the same specimen, but usually about 3 or 4 occur in a 

 length of 2 mm. In addition to the granules there are nodules, 

 more or less irregular in shape, varying to short ridges, or con- 

 nected so as partially to enclose small papillate areas from 1.5 to 

 2 mm. in diameter. In Alveolites granulosa, James, Stvoniatopora 

 subc\lindrica, James, Lahechia ohioensis, Nicholson, and Lahechia 

 montifera, Ulrich, the nodules are large, broad and relatively dis- 

 tant from each other, varying from 4 in a length of 20 mm. to 

 the same number in a length of 30 mm. In Stvoniatopora scahra, 

 the nodules have a regular conical form and are rather regularly 

 distributed, about 5 or 6 in a length of 15 mm. In Lahechia corru- 

 gata from 5 or 6 to 3 irregular noduliferous elevations occur in a 

 length of 10 mm. Stromatopora indianensis , James, was described 

 as massive, not incrusting. The thickness of the specimens here 

 described as Lahechia corrugata is 3 mm. The generic reference 

 of these specimens to Lahechia is merely owing to the superficial 

 resemblance of these specimens to the various species of Cincinna- 

 tian stromatoporoids which at one time or another have been re- 

 ferred to this genus. Probably none of these are congeneric with 

 the tvpe of that genus, Lahechia conferta. 



A large specimen, collected l)y Dr. George M. Austin, from 

 the same locality, is crossed by irregular, vermiform ridges, distant 

 in some places, more numerous, and more or less intertwining in 

 others. These ridges appear in addition to the coarse papillae and 

 the small irregular nodules characteristic of the species. For this 

 fonn the term Lahechia ( ?) corrugataglypta has been selected. 



