388 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxviii. 



radiation of septa from the sides and apex of the primary' piece to 

 th(> edoe of the disc or the niariiiii. 



''CohuneUa absent. Septa numerous, order confused; many join 

 others near to and remote from the margin. Larger septa exsert, 

 arched near the margin, from which the}' rise perpendicularly, and 

 low near the septa of the primary piece. Septa dentate and strongly 

 granular near their free edge, solid and stout. 



"Costa' l)roa(l, uneciual, often bifurcating, variously directed. At 

 the margin (nich costa gives off a ])ranch on either side to form a 

 septum with the corresponding offshoot of the next costa. Hence 

 the septa correspond with the intercostal spaces. Intercostal spaces 

 regularly furnished with et{uidistant synapticula, presenting a regu- 

 larly perforated appearance. Synapticula discontinuous, strongly 

 developed between the septa, some reaching high up in the interseptal 

 loculi. There is no true wall, the septa-costal structure being united 

 by synapticula alone." 



Type xpn-lex. — iJiafiingta (jmnulataT^uncAw, Jour. Linn. Soc. Lon- 

 don, Zool., XVII, pp. 418, 419, pi. XX. 



Distrllnitton. — C'orean Sea, shallow water, recent. 



3. Genus MICROSMILIA Koby. 

 1888. Mici-(istnili(( K(JBY, Schweiz. pala?ontol. Gesellsch., Abliand., XV, p. 414. 



Original generic diagnoKix. — ''Corallum small, simple, cylindrical, 

 conical or discoid, attached by a narrow base. Calice circular or 

 elliptical, superficial or more or less deep. Septa numerous, narrow, 

 dentate on their inner margins, finely granulated on their faces. 

 Columella strong, fasciculate. Wall well developed, membraniform, 

 folded, pierced by equal and equidistant perforations. No dissepi- 

 ments, but synapticula are present." 



Type sped ex.-^ AnihophyUimi erguelense Thurmann, Abram. Gagne- 

 bin," p. 137, pi. ii, fig. 23; Koby, Schweiz. pala?ontol. Gesellsch., 

 Abhand., XV, p. 415, pi. cxii, figs. 1-15. M. Koby places three 

 species in his Microsinilia, Anthoj)hyllaiih erguelense Thwviwanw., Tur- 

 Mnolia delenumtana Thurmann, and MicrosmiUa matlieyi Koby, but 

 designates no type species. I have selected the first one, as it is quite 

 elaborateh' described. 



Distrihutioii. — Jurassic, Oxfordian, Switzerland. 



Remarhs. — In describing M. erguelense (Thurmann), Koby gives 

 several other interesting characters. He says that the septa are not 

 perforate, that the wall is covered by a thin epitheca, and both 

 describes and figures quite a nmiiber of specimens attached by the 

 base to the inner side of a broken older corallum, reminding one veiy 

 much of the l)udcling of Schisocyathus fissilis Poui'tales.'' 



«1 have not examined this work. The reference is copied from Koby. 

 '>Um. Comp. Zool. Cambridge, 111. Cat., VIII, Mem. IV, 1874, p. 36, pis. vi, 

 figs. 12, 13. 



