COKALS AND BRYOZOA. 29 



Genus— Selenaria. Busk, 1852. 



Only a certain number of cells^ witli vibracular pores, which 

 are irregularly distributed over the convex, discoid zooarium. 



Selenaria squamosa, n. s, Zooarium orbicular, roundly 

 convex, depressed, somewhat thick ; under surface smooth, 

 enamelled. Zoooecia irregularly disposed ; sometimes with 

 lines of avicularian cells, and sometimes without ; concave, over- 

 lapping each other like scales ; orifice at the base projecting, 

 and of horse-shoe shape. Avicularian pores, pyriform, with 

 calcareous spiculse on the margin. Under surface with irregular 

 rounded costa without margins or pores. 



The form of the cells is like some of the Australian Miocene 

 species. App. Off. Cat., p. 37, No. 37 (bis). Shakespeare 

 Cliff (loAver part), Wanganui ; III. Fig. 29 — A, zooarium, mag- 

 nified 8 diameters ; B, cell, with vibracular pore magnified 24 

 diameters. 



Family — Theonid^. Genus — Fasciculipora . 

 This genus was hitherto supposed to be confined to the Older 

 Pliocene formations of England and France. It has been known 

 to authors since the Exposition ]Mctliodique of Lamouroux was 

 published, and it received some examination at the hands of 

 M. de Blainville in his Manuel d'Actinologie, p. 408. But, 

 though named, the genus does not appear to have been fully 

 described until Professor Busk gave a full diagnosis in his 

 Monograph of the Crag Polyzoa, published in 1857 by the 

 Palseontographical Society. The learned professor included it 

 amongst his Polyzoa, in the family Theonida; massive globose 

 or irregular zooaria, with contiguous crowded tubular cells. In 

 Fasciculipora, the peculiarity of the structure consists in its 

 being made up of radiating bundles of tubes. The bundles are 

 cylindrical, and of uniform or irregular dimensions. In the 

 only two sjDecies hitherto known there are striking differences 

 in the relations of the cylindrical fasciculi or bundles. In 

 one, F. tuhipora, they are united at regular distances by 

 tabular concentric divisions. In the other species, F. aurantium, 

 the fasciculi anastomose irregularly, and there are no concentric 

 tabulae. The external surface where the tubes terminate is 

 also different. In F. tuMpora it has rounded eminences. In 

 F. aurantium the surface presents undulating anastomosing 

 ridffes. It is a singular and iuterestino; fact that we have two 



