DESCRIPTIONS OF SPECIES. 171 



These two species, B. desmophyllum and B. irrorata, with their varieties, 

 form an apparently connected genetic series. 



B. desmophyllum var. microcostata is the oklest of the series, and occurs 

 in the Nanafaha bed at the base of the Chickasawan. It is succeeded by 

 the typical B. desmophyllum in the next higher horizon, the Greggs Landing 

 beds. This form ranges through the middle and upper Chickasawan, and 

 well up in the Claibomian. In the Lower Claiborne, as an offshoot from 

 this species, var. mortoni of B. irrorata appears. Var. coniformis of B. irrorata 

 is derived from var. mortoni. As another further descendant of var. mortoni 

 we have the typical B. irrorata, as it is found in the Jackson beds of Mis- 

 sissippi and Alabama. The variety dichotoma of B. irrorata is also derived 



from var. mortoni. 



Balanophyllia inaueis sp. nov. 



PI. XIX, figs. 12 to 14. 



The following is a doubtful synouymy : 

 1834. TurhinoUa inawris Morton. Synop. Org. Eem. Cret. Group., p. 81, pi. xv, fig. 11. 

 1861. TurhinoUa mauris de Fromeutel. Introd. a I'fitude des Polyp, foss., p. 100. 

 1893. TnrbinoUa inauris Boyle. North Amer. Mes. Invert. Bull. U. S. Geol. Survey 

 No. 102, p. 291. 



Morton never described "■TurhinoUa Inauris" and published only a 

 miserable figure that gives merely the form of the corallum, and the figm-e 

 is drawn upside down. The specimens, supposedly the types of the species, 

 were sent to me from the Philadelphia Academy of Sciences, through the 

 courtesy of Prof H. A. Pilsbry. Unfortunately, the figured specimen of 

 Morton is not iia the lot. It seems reasonable to assume that Morton's type 

 came from the same locality as these specimens, but even when this 

 assumption is granted it can not be decided what species he meant. There 

 are four different species among the supposed types, viz: Flabellum mortoni 

 sp. nov., Trochosmilia conoides Gabb and Horn, an Endopachys, probably 

 E.maclurii (Lea), and a Balanophyllia that I here name B. inauris. Bolsche, 

 in Credner's Die Kreide von New Jersey,^ describes what he calls Tro- 

 chosmilia f inauris (Morton), but he gives no figure, and in the state of 

 confusion of the species one can not tell from his descrip.ion what species 



he had. 



It seems to me best to discard Morton's species altogether. I apply 

 inauris to a Balanophyllia occurring among his so-called types, but this 



I Zeitsch. Deutsch. geol. GeBell., Vol. XXII, 1870, p. 215. 



