THE EED CHALK OF HUNSTANTON. 477 



Horizon. Eecl Chalk, Hunstanton. Cenomanian Stage of Le Mans 

 {iVOrh.). 



This is the only example of the species that I have found in the 

 Eecl Chalk. 



2Q. DiASTOPORA RADIANS ? (Novak). Variety ? 



1877. Berenicea radians, Novak, Bryoz. bohm. Kreidef. p. 98, 

 pi. iv. figs. 15-18. 



The example which I place under IN'ovak's name, as a variety 

 of his species, is the only one that I have found among the lied- 

 Chalk fossils. The identification of unique forms is always difficult ; 

 and this is especially so, because some of the characters in the 

 British species seem to ally it more closely with B. irilosa of the 

 same author than with D. radians. The E,ed-Chalk form, however, 

 is similar to fig. 16, both in the general outline of the zoarium and 

 in the arrangement of the cells ; but the partly formed marginal 

 cells of the British examjjle are more abundant. Zooecia not con- 

 tiguous, interspaces and cells finely punctate, disposed in linear 

 series radiating from excentric originating cells. About the middle 

 of the zoariam there is a raised gonocyst, which embraces several 

 cells, similar in character to the one depicted by Novak as the 

 "ovicell" of D. (Bere7iicea) folium, Novak (p. 96, pi. iv. fig. 14, 

 op. cit). 



Habitat. On Terehmtula hiplicata. Fossil No. 26. 



Horizon. Eed Chalk, Hunstanton ; Chalk-marl, Bohemia (NovdJc). 



27. DiASTOPORA PAPILLOSA (?), ECUSS. 



1816. Biastopora pajpillosa, Eeuss, Yerst. bohm. Kr. p. Qb, pi. 15. 

 figs. 44, 45. 



1847. Biastopora papillosa, d'Orb. Prodr. ii. p. 2QQ. 

 1847. Biastopora oceanica. d'Orb. ibid. 



1851. Biastopora disciformis, Hag. Bryoz. JMaastr. Ivreid. p. 16, 

 pi. 10. fig. 7. 



1852. Berenicea papillosa, d'Orb. Terr. Cret. v. p. 866, pi. 639. 

 figs. 6, 7. 



D'Orbigny describes and illustrates a series of Biastoporce having 

 very diverse habits, but the whole of them are very closely related, 

 if we consider the cell and cell-arrangement of the forms. Thus 

 the zocecia of Biastopora taberosa, B. grandis, B. oceanica, and 

 even B. congesta and B. littorcdis (pis. 639 and 640) are strikingly 

 similar, but the habits of nearly all are different. The example 

 that I place here resembles B. disciformis, Hag., B. tuberosa, and 

 B. oceanica, d'Orb. ; but the proliferous habit of B. tuberosa is so 

 very peculiar that I think it would be unwise to place it under that 

 name. As B. papillosa is accepted by d'Orbigny, under which he 

 places his own B. oceanica, lieuss's name has a prior claim to our 

 notice. The Eed-Chalk form is disciform, one colony overlapping 

 another ; originating cells central. 



The wonderfully wide range of this species as given by d'Orbigny 



