292 Dr. J. W. Gregory — A Revision 



Zocecia long, cylindrical ; apertures distant and irregularly 

 placed. 



Peristomes low. Walls with thin sinuous ridges. 



Distribution. — England : Great Oolite — Comb rash. Fo- 

 reign : Bajocian, Germany; Bathonian, France and Austria. 



2. Multiclausa Jellyoz, sp. n. 



Diagnosis. — Zoarium growing in large dense tufts of thick 

 irregular branches. 



Zocecia cylindrical, long. 



Peristomes raised ; surface punctate ; apertures arranged 

 irregularly, not very distant and often in irregular lines. 



Distribution. — England : Inferior Oolite — Cornbrash. Fo- 

 reign : Bathonian, France. 



Affinities. — This species is allied to M. Hairnet, Greg., but 

 differs from it by the greater elevation of the peristomes and 

 by having the zocecia more crowded and the apertures closer 

 and often in irregular lines. 



Genus 2. Terebellaria, Lamouroux, 1821. 



Diagnosis. — Clausidge in which the zoarium is arborescent 

 and thick. Zoarial growth is by the addition of Berenicoid 

 colonies on to the ends of the branches ; each colony sends an 

 expansion downward around the stem (hence growth is acro- 

 petal and exogenous). The zocecia are reflexed. The aper- 

 tures occur in zones separated by interzones of dactylethrse. 



Type species: T. ramosissima, Lamouroux, 1821. 



1. Terebellaria ramosissima, Lamouroux, 1821. 



Terebellaria ramosissima, Lamouroux, 1821, Expos. rn4th. p. 84, 



pi. lxxxii. fig. 1. 

 Terebellaria antilope, Lamouroux, 1821, op. cit. p. 84, pi. lxxxii. 



figs. 2, 3. 

 Terebellaria tenuis, d'Orbigny, 1849, Prod. Pal. t. i. p. 318. 



Diagnosis. — Zoarium massive, branching irregularly. 

 Apertures in rows of from 3 to 5 ; the lower limit is straight, 

 but the upper is very irregular. Apertures in these bands 

 crowded and quincuncial. 



Peristomes slightly raised. 



Distribution. — England : Inferior Oolite — Cornbrash. 

 Foreign : Bathonian, France. 



