A Revision of the British Jurassic Bryozoa. 287 



XXXIX. — A Revision of the British Jurassic Bryozoa. — 

 Part VI. The Fascigeiida3, Theonoida3, Dactjlethrata, and 

 Trepostomata. By J. W. GREGORY, D.Sc, F.G.S. 



[Concluded from p. 201.] 



Family Fascigeridse, d'Oibigny. 



Diagnosis. — Cyclostomata Tubulata in which the zooecia 

 are siMiple open tubes. These arise from a small cupuliform 

 or discoid base [\\\q PeJagia ox Def7-ancia sta.v!;e). The zooecia 

 are monomorphic and greatly elongate. The zoariura con- 

 sists of tufts, and the apertures all occur at the ends of the 

 tufts. 



Genus 1. Fasciculipora, d'Orbigny, 1846. 



Fasciculipora, d'Orbignv. Voyage dans TAm^i-ique m6ridionale, t. v. 

 pt. 4, Zooph., plates 1839, text 1846, p. 20. 



Diagnosis. — Fascigeridaj in which the zoarium consists of 

 long tubular zooecia grouped into bundles which branch 

 irregularly ; these form a loose, open, tufted zoarium, for the 

 bundles are not connected by platforms nor do they anasto- 

 mose. The apertures are at the ends of the branches, and 

 never on the sides, and occur in isolated groups. 



Type species : F. ramosa, d'Orbigny, l^Zd and 18-46. 



1. Fasciculipora Waltoni, Haime. 



Fasciculipora Waltoni, Haime, 1854, Bry. Jur., M^m. Soc. g^ol. France, 

 s(5r. 2, t. V. p. 200, pi. x. fig. 4. 



Diagnosis. — The branches of the zoarium each contain 

 about thirty zooecia ; the branches are marked externally by 

 longitudinal ridges ; the branching is irregular. 



Distribution. — Great Oolite, Hampton, near Bath. 



Genus 2. Apsendesia, Lamouroux, 1821 *. 



Diagnosis. — Fascigerid^e in which the zoarium rises from 

 a cup-shaped disk. The bundles of zooecia in the adult are 

 long and are grouped in long irregularly sinuous series. 

 There are no platforms. The zooecia all open upon the 



* Lamouroux, Expos. m6th. p. 81. The name is spelt Apseudesia by 

 some authors. 



