242 
EXTALOrnORA. 
Dimensioxs. 
Diameter of branch 
Diameter of aperture 
Diameter of zocecia 
D. 4596. 
2x1 mm, 
• 1--12 „ 
■15--2 „ 
Disthibutiox. 
Senonian — Maastriclitian : Royan, Cbarente-Inferieure. 
Turonian : St. Rimay, Loir-et-Clier, in Craie marneuse. 
D. 4596. A branch (on slide). Turonian: Craie maraeuse. St. Rimay, 
9. Entalophora cretacea (d’Orbigny), 1850. 
Hyxoxymy. 
Vincularia cretacea, d’Orbigny, 1850. Xouv. Bry. Cret. : Rev. Mag. Zool. ser. 2, 
vol. ii. p. 110. 
,, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 61. 
,, d’Orbigny, 1851. Bry. Cret. p. 63, pi. 600, figs. 17-19. 
,, Vine, 1893. Compi. Rep. : Rep. Brit. Assoc. 1892, 
pp. 31o, 334. 
Diagxosis. 
Zoarium of thin, dichotomous branches. 
Zocecia short and wide, flat-fronted, with prominent edges. 
Apertures from five to seven in a single whorl or spiral : on 
the basal part of the branches they are quincuncial, passing 
upwards to an irregular spiral. 
Gonoecia large, spherical protuberances. Their diameter is twice 
that of the thickness of the branch. 
Dimexsioxs. 
Distributiox. 
England : 
Middle Chalk : Chatham. 
Foreign : 
Senonian — Maastrichtian : Fecamp. 
Loir-et-Cher. Purchased 1898. 
Diameter of branch 
Diameter of zocecia 
Diameter of aperture 
Distance of aperture 
D. 416. 
*35 mm. 
•15 ,, 
Diameter of gonoecium 
Coniacian : Luynes, Indre-et-Loire, in Craie de Villedieu. 
Turonian : St. Rimay, Loir-et-Cher, in Craie marneuse. 
