404 
CETPTOGLENA. 
Suborder DACTYLETHRATA. 
[Cat. Jiir. Bry. 1896, p. 39.] 
Diagm^osis. 
Cyclostomata with a zoarium formed of long, cylindiical zooecia, 
often tabulate, separated by aborted zooecia or dactylethrae. 
1^0 cancelli, mesopores, or avicularia. 
Affinities. 
The members of this suborder differ from the Cancellata by ha^dng 
solid, non- cancellous walls to the zooecia, and by ha\dng dactylethr® 
between the zooecia. They differ from Heteropora by the absence 
of mesopores ; but the living species referred to Heteropora probably 
belong to this group. The Trepostomata arc more massive, and 
have more prismatic, densely packed zooecia. 
Family CLATJSID.^E, d’Orbigny, 1854. 
Diagnosis. 
Dactylethrata with an adnatc or erect zoarium, and with the 
zooecia distributed uniformly. Dactylethrae in circles round 
the peristomes. 
CRYPTOGLENA, Marsson, 1887. 
[Bry. Riig. : Pal. Abh. vol. iv. p. 16.] 
Diagnosis. 
Clausidae with adnate, thick, unilaminar zoarium. 
Type Species. 
Cryptoglena ad 8 per 8 a^'^ 2 X's>^em^ 1887. Campanian: Riigen. 
Cryptoglena gamblei, nov. 
Diagnosis. 
Zoarium irregularly lobed. The surface marked by radial 
ridges. Apertures subquincuncial in arrangement; crowded. 
Peristomes well raised. Apertures separated by a single 
series of dactylethrae. 
