102 REPORT 1884. 



Genus Gemellaria, Savigny, 1811. 



Gemellaria, Van Ben., Johnston, D'Orbigny ; Busk, 'Brit. Mus. Cat.' ; 

 Smitt. 1815. Scruparia, 8, Oken. 1820. Semicellaria, Blainv. Lon- 

 caria, Lamx., and Crista, sp. Lamx. 1828. Notamia, Flem. 1830. Lori- 

 cula, Cuvier. 



Neither these nor the other genera accepted by Hincks contain, so far 

 as I am aware, fossil species. 



Family III. Cellularum, Busk, 'Brit. Mus. Cat.' 



Cellularidce, (part) Johnston ; Cellulariadee and Cabereadce, Busk, 

 Brit. Mus. Cat. ; Cellulariece, (f>art) Smitt. 



' Zoozcia, in two or more series, closely united and ranged in the same 

 plane ; avicularia and vibracula, or avicularia only, almost universally 

 present, sessile. Zoarium erect, dichotomously branched.' — Hincks, op. 

 cit. p. 30. 



Genus Cellularia, Pallas. 



' Zoarium jointed. Zooecia in two or three series, many in each inter- 

 node, contiguous; dorsal surface perforated. Avicularia and vibracula 

 usually wanting: occasionally an avicuiarium on a few of the cells in an 

 internode.' — Hincks, op. cit. p. 33. 



Ibid. Busk, Smitt, part ; Bugula, part Gray. 



3. Cellulaeia Peachii, Busk (See Hincks, p. 34, vol.i. pi. v. figs. 2-5, 



vol. ii. 1880) = C f . neritiud var., Johnst. ' Brit. Zoop.' p. 340=; 



Bugula neretina, var. b, a, c, d, e, 'Brit. Mus. Cat.' 

 This is the only recent British species of this genus. Mr. Hincks says 

 that in some points of the structure there is an approach to the genus 

 Nellia, Busk, op. cit. p. 35. 



4. Cellulaeia Peachii, Busk, ' Cat. West Scotch Fos.' p. 134, ed. 1876. 

 This form is present in minute fragments in the Garvel Park beds, 



but the form differs slightly in the shape of the cells — less elongated — 

 from recent forms. In the Miocene Beds of Montecchio, North Italy, 

 there are small fragments of a form similar to the Garvel Park specimens, 

 but I cannot satisfy myself that these are really allied to Cellularia as 

 here defined. 



Post-Tertiary formation : Scottish Glacial beds, Garvel Park. 

 (?) Miocene : Montecchio Maggiore beds, North Italy. 



Genus Menipea, Lamx. 



1812. Ibid. Lamx. and part Crisia, Lamx. ; Menipea, Lamx., Busk, 

 Wyville Thomson ; Tricellaria, Flem. ; Cellularia, (part) Johnst., Smitt. 

 1849. Cellarina, (part) Van Ben. ; Emma, Gray, Busk. 



' Zoo.'cia oblong, widest above, attenuated and often elongated down- 

 wards ; imperforate behind, with a sessile lateral avicuiarium (often 

 wanting), and usually one or two avicularia on the front of the cell.' No 

 vibracula. Zoarium jointed.' — Hincks, op. cit. p. 36. 



The type of the genus is M. cirrata, Lamx., a large species with six 

 cells in the internode, and is described as found in the Indian Ocean, and 

 also in the Mediterranean Sea. The genus has a wide geographical 

 range, but I find hardly any records of the existence of fossil species. 



