EXTALOPHOKA. 
231 
D. 3276. A forked branch. Upper Chalk Detritus. Slieve Gallion, Derry. 
Presented hy Jos. "^"right, Esq. Eigd. PI. X. Fig. 9. 
5. Entalophora echinata (Komer), 1840. 
SYXOXYMA^ 
Pmtulopora echinata^ Eomer, 1840. Verst, nordd. Kr. p. 22, pi. v. fig. 23. 
non ,, ,, Michelin, 1845. Icon. Zooph. p. 211, pi. liii. fig. 5. 
,, ,, von Renss, 1846. Verst, bdhm. Kr. p. 64, pi. xiv. fig. 4. 
,, ,, von HagenoAv, 1850. In Geinitz, Quadersandst. p. 236. 
,, ,, Kade, 1852. Los. Verst. Schanzenh. p. 31. 
non ,, ,, Eric, 1870. Pal. einz. Sch. bohm. Kr. : Arch, naturw. 
Landesf. Bohm. vol. i. p. 195. 
Entalophora ,, d’Orbiguy, 1850. Prod. Pal. vol. ii. p. 267. 
I-' ,, ,, d’Orhigny, 1851. Bry. Cret. pi. 622, figs. 15-17. 
,, clavata, d’Orhigny, 1850. Prod. Pal. vol. ii. p. 267. 
,, ,, d’Orbigny, 1851. Bry. Cret. pi. 621, figs. 8-12. 
,, ,, Biicaille, 1890. Bry. Cret. Seine -Inf. ; Bull. Soc. Sci. nat. 
Boiien, vol. xxv. p. 511. 
Clavisparsa ,, d’Orhigny, 1853. Bry. Cret. p. 776. 
,, ,, Marsson, 1887. Bry. Biig. ; Pal. Abh. vol. iv. p. 21. 
Entalophora filiformis, d’Orbigny, 1851-3. Bry. Cret. p. 791, pi. 622, figs. 1-4. 
,, gracilis, d’Orbigny, 1851-3. Ibid. p. 783, pi. 617, figs. 1-4. 
,, tenuis, d’Orbigny, 1851-3. Ibid. p. 786, pi. 619, figs. 10-12. 
,, ,, Pergens &; Meunier, 1887. Bry. gar. Faxe : Ann. Soc. 
roy. mal. Belg. vol. xxi. p. 206. 
,, linearis, d’Orbigny, 1851-3. Bry. Cret. p. 792, pi. 622, figs. 5-7. 
,, pulchella, von Eeuss, 1872-3. Bry. unt. Quad. : Palseontogr. 
vol. XX. pt. 1, p. 116, pi. xxix. fig. 3. 
,, ,, von Eeuss, 1874. Bry. ob. Plan. : ibid. vol. xx. pt. 2, 
p. 133. 
,, clava. Vine, 1893. Compl. Eep. : Eep. Brit. Assoc. 1892, p. 309. 
Bidiastopora marite. Vine, 1893. Ibid. p. 310. 
Diagnosis. 
Zoarium of cylindrical or snbclayate, dichotomous branches 
which are composed of numerous zooecia. The distal ends of 
the zooecia cuiwe outwards, and are free for a considerable 
amount. The zooecia and the apertures are irregularly 
arranged and widely spaced. In worn branches the apertures 
are flush with the surface of the solid axis of the branch, 
and in shape are elliptical. 
(jronocyst irregular ; closely adnate ; affecting the area of from 
ten to thirty zooecia. 
