CAJ^ALIPOHA. 
179 
Eschar ites{C.)striato-punctata,^'6mQT, 1840. Verst, nordd. Kr. p. 17. 
Canalipora ,, von Hagenow, 1850. In Geinitz, Quadersand- 
steingeb. p. 242. 
,, ,, Schliiter, 1870. Geogn. - pal. Eeise slid! 
Scbwed. : N. Jahrb. p. 940. 
Cabalipora ,, de Morgan, 1882. Terr. cret. Scand. : Mem. 
Soc. geol. France, ser. 3, vol. ii. p. 39. 
Char. — The stems are compressed and elliptical in cross-section. They are 
seldom branched. Constrictions deep. Ribs and furrows longitudinal. 
Distrib. — Senonian— Campanian ; Riigen ; Balsberg and Oretorp, Southern 
Sweden. 
Aff.— I t is allied by its longitudinal ribbing to C. articulata. The most marked 
distinction is that in C. striato-punctata the stems are very flat. 
HETEROPOKID.^, Pergens & Meunier, 1887. 
Synonyms. 
CreseisidcB, d’Orbigny, 1854. 
Ceriopor idee, pars, Busk, 1859 ; Hamm, 1881 ; pars, Ulrich, 1900. 
Heteroporid^, Pergens &: Meunier, 1887. 
Entalophoridce, pars, Pergens, 1890. 
Heterotrypidee, Gregory, 1896. 
Diagnosis. 
Trepostomata in which the zooecia are simple, prismatic, or 
cylindrical, and grow in dense masses or thick branches. Mesopores 
present, and distributed more or less evenly throughout the whole 
zoarium. Diaphragms numerous and horizontal. JVeither cysti- 
phragms nor interzooecial vesicles present. 
In the Catalogue of Jurassic Bryozoa (1896, p. 201) the 
Jurassic species of Heteropora were included in the Palaeozoic 
family the Heterotrypidae of Ulrich. This step was taken as 
I was unable to recognize any positive character of family value 
by which these Jurassic species could be separated from the 
similar Palaeozoic species. I am still unable to point to any 
character by which, if one of the Mesozoic Seteroporce were found 
associated with Palaeozoic Heterotrypidae, it could be separated 
from them. 
The difference in geological age is, however, important, for the 
Palaeozoic Heterotrypee become extinct and are succeeded by 
the Jurassic Heteroporm only after a great interval in time ; for 
Heterotrypa is commonest in the Ordovician, though it lives on 
into the Devonian. The long separation between Heterotrypa and 
