NO. 1101. GENERA OF SIMPLE FUNOID CORALS— V AUG HAN. 389 



4. Genus PODOSERIS Duncan. 

 1869. Podoseris Duncan, Mon. Brit. foss. Cor., Sup., Pt. 2, No. 1, i». 25. 



Genus. placed in the Lojthoxerhuv. 



Original generic diagnosis. — ""The corallum has a large concave 

 base, by which it is attached to foreign bodies. The epitheca begins 

 at the basal margin, and is stout and reaches the calicular margin. 

 The height of the corallum ^'aries. The calice is generally smaller 

 than the ])ase and is convex. The septa are numerous and unequal, 

 the largest reaching a rudimentary columella. The central fossula is 

 circular and small. The cost;e are seen when the epitheca is worn; 

 the}^ are distinct, connected by S3'napticula, and are straight. 



""The genus has been created to admit Micrabaciai y^'iih. adherent 

 bases and more or less of a peduncle." 



TyjJe species. — Podoseris nuiniiniJiforniis Duncan, Mon. Brit. foss. 

 Cor., Sup., Pt. 2, No. 1, p. 25, pi. ix, tigs. 2-15; also Ann. and Mag. 

 Nat. Hist., 6th ser., IV, 1889, pp. 28-31, pi. v, tig. 9. 



Duncan originally referred two species, P. mainmiJifornds and 1*. 

 elongata,, to the genus without designating either one as the type. 

 In his paper On the Cretaceous species of Podoseris.,'^ however, he 

 saj^s, concerning the former: ""This species was the type of the genus 



* * * ." It therefore must be considered the type. 



Pistrihution. — Red Chalk, Hunstanton, England. 



Remai'hs. — Duncan gives in the paper just quoted much more infor- 

 mation concerning the structural characters, and publishes the follow- 

 ing more detailed diagnosis of the genus: 



'"The corallum has a narrow or wide base of permanent attachment, 

 the height varies from very low, plano-convex to high; stem more or 

 less cylindrical. Calice more or less circular, with a small axial fossa 

 or projecting there; a columella formed by the septal ends, with or 

 without other structure, small; septa numerous, uniting much, stout, 

 or very slender, solid, largel}" granular at the free convex edge, 

 minutel}' acicular at the sides; costte as continuations of septa, in the 

 direct line, usually the most numerous. S3^napticula? numerous, 

 oblique, continuous with septal nodules, interseptal loculi also wnth 

 recurved hook-like processes; a delicate arched dissepimental structure 

 scant3^ Epitheca exists on the sides and at the periphery. 



''Fossil: Red Chalk, Oolite, England."^ 



Duncan does not make a positive statement concerning the structure 

 of the wall except that in his original diagnosis he says the cost* " are 

 distinct, connected by S3"napticuUe." Plate ix, tig. 3, of the original 

 tigures, shows that the wall is perforate. 



« Ann. and Mag. Nat. Hist., 6th ser., IV, 1889, p. 28. 

 ^Idem, p. 36. 



