740 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
Genus DIAPEROECIA Canu, 1918. 
1918. Diaperoecia Canu, Les ovieelles des bryozoaires cyclostomes, Bulletin de la Societe 
Geologique, France, ser. 4, vol. 16, p. 329. 
No adventitious tubes ; 10 to 12 tentacles. 
Genotype. — Diaperoecia ( EntoHophora ) intricaria Busk, 1875. 
Range. — Cretaceous-Recent. 
Waters in 1914 preserved the term “ Diastopora ” for this genus as we now 
understand it. The new ideas necessitate a new nomenclature to avoid all con- 
F 
Fig. 240. — Genus Diaperoecia Canu, 191S. 
A-G. Views of ovicelled zoaria showing the oeciostome. A. Diaperoecia intricaria Busk, 
1S75. B. Diaperoecia pulcherrima Kirkpatrick, 1S90. (A, B. After Harmer, 1915.) C-E. Diape- 
roecia inter juncta MacGillivray, 1885. (After Waters, 1914, 1887, and Harmer, 1915.) F. Dia- 
peroecia ventricosa Busk, 1S75. G. Diaperoecia capitata Robertson, 1910. 
fusion, but the insufficiency of the present studies oblige us to preserve provision- 
ally the old nomenclature; it is necessary, therefore, to consider the ancient genera 
under their best known significance. It is probable that this genus will be dis- 
membered according to the form of the oeciostome. Thus the Cretaceous forms 
appear to have a very small oeciostome scarcely salient; if this observation be 
confirmed, it will be necessary to create a new genus for them. 
The previously known species belonging to this genus are : 
Entalophora regularis MacGillivray. Recent. 
Entalophora capitata Robertson, 1910. Recent. 
EntalopliorO, interjv/ncta MacGillivray, 1885. Recent. 
