NO. 1401. GENERA OF SIMPLE FUNG ID CORALS— VA UGH AN. 403 



1. Genus ANABRACIA d'Orbigny. 

 1849. Anabrarhi u'Orbigny, Notes aiir dew Polyp, foss., p. 11. 



Orig/iial generic diagnosis. — "Form circular, depressed, convex, and 

 covered above with snuill radiatino-, unequal septa; base horizontal, 

 with radiating, granulated, dichotouious ribs." 



Type-xpeeiex. — ^4. hajoelana di\Mn^\\y — F'((ng/(( compJatyata De- 

 france, 1820, Diet. Sci. Nat., XVII, p. 217. 



Distribution. — Inferior Oolite of Europe. 



Remarl'x. — Milne Edwards in I860" changed the spelling of the 

 name from Anahrada to Amthada^ redefined the genus in much 

 greater detail, and placed d'Orbigny's ^4. hajoc'tana in the synonymy 

 of the Fungla compJanata of Defrance.'' This characterization holds 

 good for to-day and is as follows: "The corallum is simple, free, and 

 without trace of adhesion; it has the form of a small plano-convex 

 lens. The upper surface shows in the center a small, shallow fossa, 

 where no trace of a columella can l)e distinguished. The septa are 

 subtrabecular {HuhpoutrellaireH) , very numerous and thin, tinelj^ and 

 regularly crenulate; they terminate on the lower face of the corallum 

 in crenulate co.stal edges similar to those of the upper surface, without 

 there being a distinct basal wall. The septa of the last cycle unite by 

 their inner margins to the neighboring primaries. 



'•The A/uihacice difier from the other species of this subfamily 

 [J^imgifise]., the F'ungia^ and ADcrahachv., by the absence of a wall, 

 properly speaking, and the much less perfectly developed septa.'' 



The septa of Anahracla are formed by palissades of small rods (tra- 

 becular) connected with one another so as to form a regularly fenes- 

 trated network. Duncan makes the genus the type of his family 

 Anabaciadcv.'' Gregory i)laces it in his Microsolenidiv.'' 



2. Genus TROCHOPHLEGMA Gregory. 

 1900. Trocliophlegma Gregory, Jurassie Fauna of Cutch, the Corals, p. 179. 



Orlginid generic diagnrmx. — '"'' Aricrosolenida?, in which the corallum 

 is simple or composed of a few corallites united by lateral gemmation; 

 it is fixed or free, and may be pedunculate or have a rounded convex 

 base. Calice small, but well marked. Columella absent; the calicular 

 fossa is small, but rather deep; it is central or excentric in position. 

 Septa ver}' numerous; trabicular. The septal elements consist of 

 upright rods, which slope slightly outward as they are followed from 

 the base; they are connected by two sets of cross rods at right angles 

 to each other. The concentric horizontal bars are very conspicuous 



«Hist. nat. Corall., Ill, pp. 31, 32. 



''Diet. Sci. nat., XVII, 1820, p. 217. 



'-Jour. Linn. Soe. London, Zool., XVII, 1884, p. 165. 



<' Jurassic Fauna of Cutch, the Corals, 1900, p. 174. 



