438 



F. CANU. 



REVISION DES BRYOZOAIRES 



23 Avril 



G. Caleschara M. Gill., 1886. 



« Zoarium encrusting, or erect, and uni, or hilaminate. Zoecia 

 separated hy distinct, raised, calcareous margins ; front covered by a 



thick epitheca, be- 

 neath which the 

 calcareous front 

 xjoall is bevelled to 

 the depressed cen- 

 tre ; on each side 

 of the calcareous 

 front is a longitu- 

 dinal fissure, and 

 across the upper 

 par a thickened 

 bar, leamng a mem- 

 branous portion 

 above containing 

 themouth,theoper- 

 culum of which is incomplète. Oecia alterated and expanded zoecia. » 

 (M. Gill.). — Opésiules linéaires perforant le cryptocyste. Zoécies 

 dimorphes. Actuel. 



Type : C. denticulata M. Gill. (Fig. 50). 



j. 50. — Caleschara M. Gill. — Type 

 (M. Gill.). 



C. denticulata 



G. Steganoporella Smitt, 1872. 



« Zoecia flustrina, extus microporidacea, intus calcificatione 

 secundaria constructionem Steginoporarium (d'Orb.) imitandur. » 

 (Smitt). (( Zoecia with the aboral compartment divided into two 

 chambers hy a diaphragm, the lov^^er of which is connected by a 

 tubular passage with the upper and coutains the polypide; the 

 whole of the upper half of the cell forming a large cavity, closed by 

 the operculum and membranous front wall. Operculum very large. 

 External œcia wanting; represented by an internai chamber » 

 (Hincks, 1887). Actuel. 



Type : St. magnilabris Busk (Fig. 51). 



La définition de Smitt est fausse, la constitution étant totalement 

 différente de Steginopora (d'Orb.). Hincks en 1887 a donné une 

 diagnoseplus exacte, mais uniquement basée sur l'examen d'échan- 

 tillons desséchés. Le D"" Jullien classe ce genre dans la famille des 

 Opésiulidées, en écrivant: « Ce que Smitt et Hincks ont pris pour 



