414 PROCEEDINGS OF THE NATIONAL MUSEUM. vou xxviii. 



Oo;ilvic in her Koiallen der Strainl)erg-er Schichten'* attempted to 

 jrivc more detail <'()n('eriiin<>- the genus. She remarks (p. 252): 



rnfortniuik'ly tlu' Nattlieim specimens of Ej)i.'<trfpl(ipln/l/>uii do not ixTiiiit a 

 minute, niUTOHcopical investigation. However, many conclusions concerning the 

 liner septal structure can always be drawn from the superficial sculpture of the septa. 

 It is important that the septa are often interrupted and that the separated pieces form 

 in the center a spongy columella. The synapticula likewise occur irregularly and 

 give to the septa more often a Eupsannnid septal appearance. The Stramberg speci- 

 mens, which agree in all external characters with the Nattheim forms, are better 

 preserved and show the finer septal structure characteristic for the Eupsammidiv. 

 Thus the systematic position of the genus Epistrcptojylnjllum is made clear, and at the 

 same time its near relation to the synchronous simple Ilaplarxa and the compound 

 Diplarna is shown. 



Oj;'ilvie does not mention on Avliich of Milaschewitz's species she 

 based her remarks. Howe\"er, she identified one of her Stramberg 

 species with E. comvnuie. If we could assume her identitication as 

 correct, J^. coiiviivune would become the geno-type. 



Ogilvie's recharacterization of the genus: 



Corallum simple, conical or cylindrical, calice rather deep; septa 

 very luimerous and thin, separated now and then into individual tra- 

 becular members. Granulations on the septal faces not regularly 

 arranged and of ver}" dissimilar size, many developed as pseudosynap- 

 ticula. True .synapticula and numerous vesicular dissepiments present. 

 Columella spongy, large, composed of free and interlacing trabecular 

 members of the longer septa. No true wall, only a pseudothecal 

 thickening of the septal and interseptal skeletal parts near the outer 

 edge. Epitheca thin, v/rinkled, extending to margin of the calice. 



Ogilvie regards LitJioseris Koby as a synonym of EinHtreptojyliyl- 

 Ixuii. Gregory thinks her opinion '""probabh" correct." For a fuller 

 discussion see Litlioserls^ p. 398. 



5. Genus THECOSERIS de Fromentel. 

 1870. y7(«'as(;-/.s- DE Fkomentel, Paleontol. franc., Cretace, VIII, Pt. 2a, p. 367. 



Original generic diagnosis. — ""Corallum elevated and regularh^ tur- 

 binate; columellar fossa, when present, round; usually the septa meet 

 in the center, where the}^ fuse and simulate a papillary colimiella, but 

 which really does not exist. The septa are thin, numerous, often 

 anastomosing and finely denticulate; they are never exsert, and the 

 calice is usually concave. T'he epitheca is strong, well developed, much 

 folded, and extends to the edge of the calice." 



Type species. — Thecoserls jxitellata de Fromentel and Ferr\% Pale- 

 ontol. frany., 1st ser., Jurassi(iue, Pt. 18, pi. lviii, fig. 2, 1869. 



iJlstrlhntlon. — .Jurassic, Lias, France. 



Rehiarks. — The structure of neither the wall nor the septa is 

 described. The figures of the type species indicate an imperfect, 



"Pala-ontogr., Sup., II, 1897, pp. 248-255. 



