TF. I). Lang — Kep to some Cretaceous Polyzoa. 465 



h. Diameter of apertiu'es -1 to •2mm. 

 a. Transverse distance between apertures about the diameter of 



one aperture 



j8. Transverse distance between apertures ^ to | diameters of 

 aperture ... ... ... ... ... ... ... 



c. Diameter of aperture "04 to •! mm. 

 a. Peristomes moderately high 

 /3. Peristomes very high 

 III. Apertures close, but bare patches on the zoarium 



B. Branches compressed. 



I. Apertures transversely elongate 



II. Apertures circular. 



a. Zooecia emergent. 



1. Apertures very distant (four to six diameters apart vertically) 



2. Apertures distant (three to four diameters apart vertically) 



3. Apertures close (tAvo and a half diameters apart vertically) 



b. Zooecia immersed. 



1. Zoarium transversely striate 



2. Zoarium smooth. 



o. Vertical distance between apertures 3 to 6 times their diameter. 



a. Boimdaries of zooecia not apparent... 



b. Boundaries of zooecia clearly marked 



j8. Vertical distance between apertures 1 to 3 times their diameter. 

 a. Lateral distance between apertures 2 to 3 times their diameter ... 

 h. Lateral distance betAveen apertures J to \\ times their diameter. 



1. Lateral distance J a diameter. Diameter of aperture about 



•3 mm. 



2. Lateral distance 1-1§ diameters. ? Diameter of aperture about 



•1mm. 



C Branches triaiigiilar in cross-section 



D. Zoarium cylindrical ivith a cup-shaped top 



E. Zoarium clavate. 

 I. Apertures close (vertical distance between the apertm-es about 3 diameters 



of an aperture and lateral distance about 1^) 

 arrangement in whorls 



Apertures tending to an 



II. Apertures distant (vertical distance between the apertures 3-5 diameters 

 of an aperture) . Apertures irregularly arranged. 



a. Zooecia thoroughly emergent 



b. Zooecia somewhat emergent 



c. Zooecia immersed 



30 



31 



32 

 33 

 34 



35 



40 

 36 

 37 



38 



39 

 40 



41 



42 



43 

 44 

 45 



23 



46 

 47 

 48 



. Entalophora Fergensi, Gregory, 1899 : Brit. Mus. Cat. Cret. Bry., 



vol. i, pi. X, figs. 5, 7 E. Fergensi. 



. Fustulipora virgula, von Hagenow, 1851 : Bry. Maastr. kr., pi. i, 



fig. 3 E. virgula. 



Entalophora virgula, var. alternata, Gregory : loc. cit., pi. x, fig. 3. ,, 



E. virgula, var. subgracilis, Gregory: loc. cit., pi. x, fig. 4. ,, 



E. virgula, var. raripora, Gregory: loc. cit., pi. xi, fig. 2. ,, 



? E. virgula, Gregory: loc. cit., pi. xi, fig. 16. ,, 



Fustulipora rustica, von Hagenow, 1851 : loc. cit., pi. i, fig. 5. ,, 



P. nana, von Hagenow, 1851 : loc. cit., pi. i, fig. 4. ,, 

 Entalophora rarijjora, Beissel, 1865, Bry. Aach. ki-. : Nat. Verb. 



hoU. Maatsch. Wet., ser. ii, vol. xxii, pi. x, fig. 123. ,, 



E. iconensis, d'Orbigny, 1851 : Bry. Cret., pi. 616, figs. 12-14. ,, 



E. subgracilis, d'Orbigny, 1851 : loc. cit., pi. 621, figs. 4-6. ,, 



E. alternata, d'Orbigny, 1851 : loc. cit., pi. 621, fig. 7. ,, 



? E. santonensis, d'Orbigny, 1851 : loc. cit., pi. 623, figs. 15-17. ,, 



? E. variegata, d'Orbigny, 1851 : loc. cit., pi. 622, figs. 18-21. .„ 



UECADB V. — VOL. HI. — NO. X. 30 



