200 The Ohio Journal of Science [Vol. XVII, No. 6, 



early days occasionally were labelled erroneously as coming 

 from the Clinton. For instance, the specimen of A try pa 

 nodo sir lata, Hall, from the Cedarville dolomite at Yellow 

 Springs, Ohio, which is numbered 12103 in the collections at 

 Columbia University, is there labelled as coming from the 

 Clinton, and in former da3''s I have seen similar erroneous 

 labelling elsewhere. Under these circumstances it is not unlikely 

 that Acervidaria clintonensis may prove to be a Cedarville 

 dolomite species. It is a much smaller species than Graubau- 

 phyllum johnstoni. The corallites average about 8 mm. in 

 diameter. The outer zone is described as consisting of loose 

 vesicular tissue in which the septa often are imperfectly devel- 

 oped. The intermediate zone consists of 40 to 46 slender septa, 

 alternately large and small, united laterally by transverse dis- 

 sepiments. Since no dissepiments are indicated in the central 

 parts of the corallum, this part may correspond to the abun- 

 dantly tabulate part of Grabauphyllnm. The present location 

 of the type of Acervidaria cli?itonensis is unknown. It is 

 assumed to have been destroyed in the fire which consumed the 

 collections of Toronto University, years ago. 



Calostylis parvula sp. nov. Plate VIII, Figs. 2A, B, C, D, E, F; 



Plate IX, Fig. 5. 



Coralla simple, usually not exceeding 25 millimeters in length, but 

 sometimes equalling 35 millimeters. Most of the specimens are curved 

 strongly toward the base, producing a concave outline anteriorly, 

 and convex outline posteriorly, when the corallum is viewed from the 

 side. The wall of the corallum is thin, and is marked by distinct 

 transverse striae and by more or less indistinct longitudinal lines, 

 intermediate in position to the septa on the interior. Frequently 

 the wall has weathered away, especially along the upper part of the 

 corallum, exposing the septa. 



Larger septa, about 30 to 35, extend toward the center, and there 

 form a central mass (Fig. 2F), occupying about one-third of the width 

 of the corallum. This central mass probably rises only a very short 

 distance above the bottom of the calice. Within this central mass the 

 proximal parts of the septa can be followed only a short distance since 

 they fomi an irregularly vesicular growth, transversed by irregularly 

 communicating pores. If any part of this central structure is to be 

 interpreted as equivalent to tabulae, then these tabulae also are pen- 

 etrated by pores. 



Pores also traverse the septa, but vary greatly in number. Between 

 the larger septa, which extend from the wall of the corallum as far as 

 the central vesicular mass, there is an equal number of shorter septa, 

 alternating with the larger ones. In some specimens, the shorter 



