NO. 1401. GENERA OF SIMPLE FUNG ID CORALS— VAUOHAN. 419 



larly developed internal structui'e. Septa proper are not present. 

 The septal spines grow together at the bottom, hut th(>y arc free 

 above. Traces of a bilateral arrang-enient of the septal spines was 

 .sometimes observed in the simple corals. The endotheca is in the 

 form of concave, rather regular dissepiments or convex vesicles, 

 without there being- a distinct boundary between the two forms of 

 development. In the case of small species (also in those of large 

 species that have remained small) the dissepiments appear as ta])uhe.'" 

 The stratig-raphic distriljution is given as '' Upper Musselchalk, 

 Zlaml)ach beds, Hallstiltter Chalk, Hauptdolomit, and the Rhaetic.'^ 



2. Genus ST YLOPH YLLOPSIS Freeh. 



1890. , SI i/Ittp]ii/llopsi>i FRECii, PaLcontographiea, XX'XVII, \). 4S. 



(h'Ujinal (jenerjc duuinosli<. — ^'''^\\\vi^\^j or only slightly branched; in 

 cross-section agre(nng quite closely with JSrontllvaltid, in longituditial 

 section agreeing with StyloplnjUamP 



D!.st7'ihut(on. — Norian stage, Rhaetic, lower and middle Lias. 



Type species. — Styh)2>hynoj>sis jxAyacth Freeh, Paheontographica, 

 XXXVII, p. 48, pi. XII, tig. 3, pi. XIV, tigs. 17-23, text tig., p. 49. 

 Freeh refers six species to this genus: Stylophyllopsis poly act is 

 Freeh, S. zUtelJl Freeh, S. rudls (Emmerich) (as Fiingia)^ S. caes- 

 plfosa Freeh, S. majsvarl Freeh, and S. liiuhtTdmi Freeh, but 

 designated no type species. 



licmarl's. — ^Regai'ding tliis genus, Freeh says: "The septa forma 

 transition between the isolated spines of Sfylopliylltim and the compact 

 lamellii^ of Montlimdtia (bezw. TheeosmU/d). The septal spines in a 

 cross-section are seen near the center (Plate x, figs. lOa, 12), (juite 

 exceptionally in other places. In a longitudinal section they appear 

 in an isolated condition in the same place; furthermore, as can be 

 especially well seen on weathered surfaces, the spines of the upper 

 portions of the septa are only loosely fused with one another. The 

 upper margins of the septa are distinctly and deeply toothed.'" 



OUTLINE OF THE CLASSIFICATION. 



The following outline, which is accompanied by page references^, will, it is hoped, 

 facilitate the use of the classification. 



I'age. 



Family Fungiida? 379 



Oenus Fungia 380 



Family Agariciida* 384 



Table of differential character of the genera 384 



Genus Trochoseris 384 



Palfeoseris 385 



Bathyat'tis - 385 



Fungiacvathus 386 



