FASCICTTLIPOBA. 167 



the Theonoidse by having the zooecia in more or less disconnected 

 tufts instead of upon the summits of fairly regular, continuous 

 ridges. 



The most primitive genus in the family has a small funnel- 

 shaped zoarium. The first advance consists in the upward growth 

 of the zooecia into stem-like branches (Fasciculipora}. In the next 

 stage these stems grow into tufts, which may become so crowded 

 as to form hemispherical masses (Apsendesia). In another type the 

 zoarium consists of irregular, encrusting, branching ridges. 



FASCICULIPORA, D'Orbigny, 1 1846. 



Diagnosis. Fascigeridse 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 anastomose. 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, 1839-1846. 



Affinities. This genus differs from Apsendesia by having the tufts 

 of zocecia free, instead of grouped into masses. The open, tufted 

 form of the zoarium distinguishes it from Fascicularia (Macandropora, 

 D'Orb.), as it has no platforms, and the branches do not unite into 

 a dense, massive zoarium. The absence of groups of apertures on 

 the sides of branches distinguishes it from Cyrtopora. 



Fasciculipora waltoni, Haime. 



SYNONYMY : 

 Fasciculipora waltoni, Haime, 1854, Bry. jurass. : Mem. Soc. geol. France, 



sr. 2, t. v. p. '200, pi. x. fig. 4. 



Pictet, 1857, Traite Pal. ed. 2, t. iv. p. 127. 



,, ,, Vine, 1883, 3rd Rep. Foss. Polyz. : Rep. Brit. Assoc. 



1882, pp. 262, 265. 



,, Woods, 1891, Cat. Type Foss. Woodw. Mus. p. 46. 



,, ,, Gregory, 1896, Rev. pt. vi. : Ann. Mag. Nat. Hist. 



ser. 6, vol. xvii. p. 287. 



1 D'Orbigny. Voyage dans 1'Amerique Meridionale, t. v. pt. iv. Zooph. 

 plates, 1839 ; text, 1846, p. 20. 



