CLirSA. 
419 
D. 1383. 
r. 3754. 
D. 6402. 
D. 6446. 
D. 6448. 
D. 6452. 
Three fragments (on slide). Maastrichter Kreide. Maastricht. 
Vine Coll. 
Two fragments (on slide). Maastrichter Kreide. ^Laastricht. 
Gamble Coll. 
Six fragments (on slide). Maastrichter Kreide. Maastricht. Busk 
Coll. 
Three slender fragments (on slide). ^Maastrichter Kreide. Maastricht. 
Busk Coll. 
Eleven fragments (on slide). Maastrichter Kreide. St. Pierre; 
Maastricht. Busk Coll. 
T wo slender fragments (on slide). Maastrichter Kreide. Maastricht. 
Busk Coll. 
5. Clausa lepida (Xovak), 1877. 
Synonymy. 
Heteropora Icpkla, Xovak, 1877. Bit. hohm. Kr. : Denk. Ak. 'Wiss. Wien. 
vol. xxxvii. pt. 2, p. 115, pi. viii. figs. 21-33. 
,, ,, Pocta, 1892. Mech. Koryc. Ilory : Ces. Ak. Fr. Jos. Praze, 
sect. ii. p. 24, pi. iv. figs. 21-23 ; p. 8, fig. 9. 
Diagnos;is. 
Zoaniini of thiu, dicdiotomous, cylintbical branches, Avliicli end 
bluntly. 
A2)ertures distant, and in most of the zoarium arranged in regnlar 
o^ten spirals ; but at the base the apertnres are covered by 
reticular layers, and in places are irregular in arrangement. 
Apertnres separated by a single or double cii’cle of angular 
dactylethrse. 
Peristomes often well raised. 
Dimensions. 
Diameter of aiierture -19-*2 mm. {Jicle Poctaj. 
Diameter of maciilne -04--05 ,, {fide Voo.i 2 t). 
Disteibution. 
Cenomanian : Kank, Jiue, Kolin, Zhislav, and Kamajk, Bohemia, in 
Korycauer Schichten. 
Affinities. 
This species is closely* allied to C. irregularis, from which it 
differs by its more regular arrangement of the peristomes. The 
