102 



REPORT — 1884. 



Genus Gemellaria, Savigny, 1811. 



Gemellaria, Van Ben., Johnston, D'Orbif»ny ; Busk, 'Brifc. Mus. Cat.' ; 

 Smitt. 1815. Scruparia, P, Oken. 1820. Semicellana, Blainv. Lon. 

 caria, Lamx., and Crista, sp. Lamx. 1^28. Notamia, Flem. 1S30. Lori 

 cula, Cuvier. 



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

 as I am aware, fossil species. 



Family III. Ci'.LLULARiiD.f:, Bnsk, 'Brit. Mas. Cat.' 



Cellularldai, (part) Johnston ; Ccllnlariadce and Cahercaihc, Bask, 

 Brit. Mas. Cat. ; Cell idav ken, (part) Sraitt. 



* Zowcia, in two or more ^eries, closely united and ranged in the same 

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

 present, sessile. Zoarium erect, dichotomously branched.' — Hinck.s, op. 

 cit. p. 30. 



Genus Cellulaeia, Pallas. 



' iiOartM))?. jointed. Zooscia in two or throe series, many in each intcr- 

 node, contiguous; dorsal surface perforated. Avicularia and vihrncida 

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

 internode.' — Hincks, <i^. cit. p. 33. 



Ihid. Busk, Smitfc, part ; Bugtda, part Gray. 



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



vol. ii. 1880)=.C iieritiiia var., Johnst. 'Brit. Zoop.' p. :]40= 

 JJugula neretina, var. h, a, c, d, e, 'Brit. Mus. Cat.' 

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



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



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



4. Cellulakia Peachii, Busk, ' Cat. West Scotch Fos.' p. 134, ed. 1S7G. 

 This foi'm 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 satisty myself that these are really allied to CcUularia as 

 here defined. 



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

 (?) Miocene : !^Iontecchio !Maggiore beds. North Italy. 



Genus Men'U'ea, Lamx. 



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

 "VVyvillo Thomson ; Tricdlaria, Flem. ; CcUularia, (part) Johnst., Smitt. 

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



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

 wards ; imperforate behind, with a sessile lateral avicularium (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. cirrala, 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 fiind hardly any records of the existence of fossil species. 



