SirHOyiOTYPHLrS. 
275 
DniExsioxs. 
Diameter of brauch ... 
Diameter of zoojcia ... 
Diameter of aperture 
Distribution. 
Chalk Detritus : Charing, Kent. 
B.M., D. 2821. 
•2o-'8 mm. 
•1--17 „ 
•08 ,, 
Figures. 
ri. XII. Fig. 3. A zoarium, X 12 tlia. Chalk Detritus: 
dialing. T. K. Jones Coll. D. 2821. 
PI. XII. Fig. 4. A thin, longitudinal seetion, x 10 dia. 
Charing. T. K. Jones Coll. D. 4940. 
Affinities. 
This species agrees with C. striatopora (Vine) in the height of 
the peristomes, but the zooccia and zoarium arc smaller, and the 
apertures more distant. The peristomes, moreover, arc less sharply 
reflexed. It may he regarded as a thin, deep-sea representative of 
C. striatopora. 
LIST OF SPECIMEXS. 
D. 2821. Thirteen fragments (on slide). Chalk Detritus. Charing, Kent. 
T. R. Jones Coll. Figd. PI. XII. Fig. 3. 
D. 2822. Five fragments (on slide). Chalk Detritus. Charing. T. II. Jones Coll. 
D. 4588. Four fragments (on slide). “ Chalk ^larl ”(? Detritus). Charing. 
P. E. Ewen Coll. 
D. 4940. A thin, longitudinal section. Chalk Detritus. Charing. T.R. Jones 
Coll. Figd. PI. XII. Fig. 4. 
SIPHONIOTYPHLUS, Lonsdale, 1850. 
[Dixon, Geol. Sussex, p. 300.] 
Synonyms. 
Innccopora, von Reuss, 1872. 
Epidictyon, Marsson, 1887. 
Diagnosis. 
Zoarium of erect, ribbon-shaped, compressed branches, which 
occasionally divide dichotomously. The lateral margin may 
