104 



REPOHT — 1884. 



fragments of species being minute, the cbaracters have to bo made out 

 very cautiously. 



Cienns Caderea, Lamouronx. 



= Cellaria sp., LamV. ; Flnstra sp., Flem., Jobnst. ; Selhia, Gi'ay ; 

 FlahoUaria, Gray; Canda sp., D'Orb. 



• Zoarlum not articulated. '/(urcla in two or more series, sub- 

 quadrangnlar or ovate, with a very large aperture. Sessile avicularia on 

 the side and front of the cells, the lateral avicnlarinm minute. Vibra- 

 cnlar cells very large, placed in two rows, stretching obliquely downwards 

 across the back of the Zoo'cia, which they almost cover, to the median 

 line, notched above and traversed through a great portion of their length 

 by a shallow groove. Seta3 usually toothed on one side.* — Hincks, 

 'Mar. Polyz.' p. 57. 



Fossil Caherea are, like the Scrvpncellaria previously described, also 

 diflBcult of speciBc identification ; but the genera being so cosmopolitan, it 

 would be surprising indeed if fragments were not distinguishable. The 

 size of the vibracula is one of the peculiar features of Caherea, and tlie 

 many characters of the genus given by Mr. Hincks ought to make the 

 study of species peculiarly attractive. But much of our knowledge 

 concerning fossil forms is furnished by ]\Ir. A. W. Waters in his series of 

 Papers on Australian Bryozoa. Even he, however, has had to depend in 

 one instance on a single row of cells, while in others the ' opercula,' and 

 the large erect aviculavium have helped in the determination of specific 

 forms. 



Caherea Eij.ipii, Fleming (Hincks, p. 59.) = Flustm ibid., 

 Flem. ; F. nelarea, Flera., Johnst. ; Cellular ia Ilookerl, part, 

 Johnst. ; BiceUnria lloolceri, Blainv. ; Caherea Hooker)\ Busk, 

 Gosse; Flalcllaria setacfii, Gray. Glacial and Palaeolithic. 



Cabebea Bouyi, Audonin, Waters = Crista Bory!, And. = Selhia 

 r-danica, Cnhprni ibid., Gray, Busk ; Caherea Boryi = C. 

 jmtagonica, Bnak^Canda Boryi, D'Orb, ' Pal.' ; Glacial, British ; 

 Miocene, Australia. 



18. Caheuea nUDis (?), Busk. Glacial, British; Australia, Miocene. 

 Waters, ' Qnnrt. .Tonr. Gcol. Soc' vol. xxxvii.. vol. xxxviii. 



19. Carerea CiKANOis, Hincks. Glacial, British ; Australia, Miocene. 

 Waters. 



20. Caberea lata, Busk. Australia, Tert. Poly. Etheridge, jun., 

 ' Synopsis.' 



16. 



17. 



Family IV. Bicellarifd^'e, Busk, Smitt. 



Genus BiCELLARiA, Blainville. 



In his remarks on the family Bicellariids Mr. Hincks says : * The 

 zcarium assumes two very different and strongly contrasted conditions 

 within the limits of this family ; and it is only after carefully examining 

 the entire series of forms included in it that we recognise the close 

 affinity of such divergent genera as Bicellaria and Bugula. The two are 

 connected and linked together by the genus Bugula and the genus 

 Biachoris, of which latter we have no representatives on our coast.' — 

 ' Brit. Mar. Pol.' 64. We have no foaail Bicellaria, and only one, I believe, 

 of Bugula. 



