NO. 1101. GENERA OF SIMPLE FTJNGID CORALS— VAUGHAN. 409 



Genus CYCLABACIA. 

 1866. Cjirlnhacia Bolschk, Zeitsch. deutsch. geolog. Gesellsch., XVIII, p. 47.">. 



(Jrlgiiial <jeru:rie dlmjnosU. — "'Coralluin simple, free, discoid, jirched 

 above, underside more or less tlat. Wall perforate. Ril)s radiutino- 

 from the center outward, granulate; the separate granulations some- 

 times fuse with one another, forming conceutrie striations. Costte not 

 alternating- at the margin with the septa, but passing directly into 

 them. Epitheca absent. Septa of the first and second cycles straight; 

 those of the other cycles more or less curva^d and to a great ext(Mit 

 uniting with one another. Septal margins dentate. Septal faces 

 strongly granulate, the granulations drawn out into line points, which 

 show a tendency to unite with those of the neighboring septa. 

 Columella strongly developed or rudimentary." 



Type species. — Vyclabacia stelllfera Bolsche, Zeitsch. deutsch. geolog. 

 Gesellsch., XVIII, p. 474, pi. ix, fig. 8. 



Distribution. — Cretaceous, Senonian, North Germany. 



RemarJiS. — Bolsche states that Cyclahacia is separated from A nahacia 

 b}^ the presence of a perforate wall;" from Micrdtxicid by the costaj 

 not alternating with the septa, i. e., the costal and septa are continuous 

 in Oyclabacia. 



Three species, Cydahacia semiglohosa, C. steJlifera., and C fromen- 

 teli., all of Bolsche, were described and placed in the genus at the 

 time of its publication, and no type species was designated. I have 

 selected the second as the geno-t3^pe, because l)oth the description and 

 the figures are satisfactory. 



Bolsche unfortunately does not describe the septal structure. 



Duncan,-' in his Revision of the Genera and Families of the Madre- 

 poraria, placed Cyclahacia in the '''' Steplianoplnjllioida^'^ of the 

 Eiipsammidse., remarking that ''This is probably identical with 

 Fungia., and is therefore a link between Micro}>acia, and F'ungia.'''' 

 It is difficult to see wh}" he should have placed it systematically so far 

 from where he says it belongs. 



IV. CONDITION OF NEITHER THE WALL NOR THE SEPTA KNOWN. 



1. Turbinoseris. 



2. Elliptoseris. 



3. Gonioseris. 



4. Epistreptophyllum. 



5. Thecoseris. 



«"Von Anabacia trennt diese Gatcung das Vorhandensein einer durchborten 

 Mauer." This supposed difference is of no value, as the wall of Anabacia is synap- 

 ticular, abundantly perforate. See p. 408. 



ftJour. Linn. Soc. London, Zool., XVIII, p. 174. 



