66 M. K. A. Zittel on Fossil Galcisjjongice. 



Celyphia, Pomel. 



(Pal. d'Oran, p. 229.) 



Manon p. p., Miinst., Klipst. 

 Hippalimus p. p., D'Orb. 

 Verrncospongia p. p., Laube. 



Sponge composed of globular or ovate individuals, irregu- 

 larly arranged upon one another, often united into nodular 

 masses, constantly increasing in size according to their age. 

 Wall of the individual dense, pierced by isolated margined 

 oscula. This wall encloses a cavity which is very incom- 

 pletely occupied by a very loose web composed of fine ana- 

 stomosing fibres. 



Under the microscope both the wall and the fibrous tissue 

 in the interior appear solid. As, however, the same constitu- 

 tion is observed in many true Calcispongise from St. Cassian, 

 it may be regarded as a consequence of late alterations. 



I place this very peculiar genus with many doubts among 

 the Calcispongise. Its whole external appearance, and its 

 constitution of separate, well-defined chambers, rather reminds 

 one of certain Foraminifera ; but the partial filling of the 

 chambers with a loose-meshed tissue is irreconcilable with 

 the idea of a Foraminifer. 



The structure furnishes no information as to the zoological 

 position of the genus, which, however, may be best arranged 

 beside Colospongia and Verticillites. 



The only species is from the Trias of St. Cassian : — 



Manon submarginatum, Miinst. Beitr. iv. Taf. i. fig. 9. 

 Manon pisiforme, Miinst. ib. Taf. i. fig. 8. 



Verrucosponaia submarginata, Laube, Fauna von St. Cass. Taf. i. 

 fig. 11. ' 



HlMATELLA, Zittel. 



Trayos p. p., Miinst., Klipst. 

 Lymnorea p. p., D'Orb. 

 Lymnoretheles p. p., Laube. 



Sponge obconical, simple. Vertex slightly convex, with 

 a central circular osculum, the efferent orifice of a narrow tube 

 traversing the whole sponge. Surface furnished up to the 

 margin of the vertex with a smooth or concentrically wrinkled 

 dermal layer. No radial or other canals. In longitudinal 

 section the fibrous skeleton shows a tendency to become con- 

 densed parallel to the vertex at regular distances, so as to 

 produce a faint indication of transverse floors. 



This genus unites Peronella with Colospongia and Verti- 

 cillites. The narrow perforant central cavity and the absence 



