222 Transactiojis. 



brown colour, and incrusted with diatoms. It differs from that 

 figured by AUman for the British form in being more slender, 

 ajid in the suppression (complete or partial ?) of the ridge-like 

 keel — which, however, does not appear to be very prominent even 

 in British specimens. 



The only difference which I could detect in the zooid itself 

 was in the form of the epistome, which in the New Zealand speci- 

 men was bluntly rounded at the apex, while Allman's figure 

 (pi. ix, fig. 7) shows it as being gradiially sharp-pointed. This 

 may be due to difference in the state of contraction, and in any 

 case can hardly be regarded as of specific importance. The 

 specimen contains no statoblasts. and, pending the examination 

 of these in the New Zealand form, the specific identification may 

 be considered as somewhat doubtful. 



Fredericella sultana has been recorded from various parts of 

 Europe and from Australia,* while Krsepelinf regards the three 

 Americaii speciesf of Leidy and Hyatt as doubtfully identical 

 with this species. 



It is interesting to note that Jullien§ regarded Fredericella 

 sultana as being a monstrous form of Plumatella lucifuga, but 

 Kraepelin does not agree with this view, and maintains the genus. 



Hutton, in his " Catalogue of the Marine Mollusca of New 

 Zealand,"|| records the occurrence of Plumatella a/plinii, Mac- 

 gillivray, in the Malvern Hills. As he states that he only ex- 

 amined dried specimens, however, this identification must be 

 regarded as doubtful. Hamilton, in 1879.^ described a form 

 from near Napier, which he identified (somewhat doubtfully) 

 with Plumatella repens. He examined the living animal and the 

 statoblasts, so that it seems tolerably certain that the genera 

 Plumatella and Fredericella both occur in New Zealand, as they 

 do also in Europe and Australia (Whitelegge). Hamilton has 

 also recorded** the occurrence near Dunedin of Paludicella 

 ehrenbergi ; so that we have in New Zealand at least three of the 

 common genera of fresh-water Polyzoa, while none of the species. 

 can, in the present state of our knowledge, be regarded as en- 

 demic. 



* Whitelegge, Proc. Linn. Soc. N.S.VV., viii (1883), pp. 297, 416. 



f Krtepelin, " Die Deutschen Siiswasser - Bryozoen," Festchrift ties- 

 Naturwissenschaftlichen Vereins, Hamburg, 1887. 



% F. regina, Leidy (Proc. Acad. Nat. Sci. Philadelphia, vol. v, 1851) : 

 F. walkottii and F. pulcherrina, Hyatt (Communications Essex Institute, 

 vols, iv and v, 1865-6). 



§ JuUien, " Monographie des Bryczoaires d'Eau douce": "Bulletin 

 dc la Societe Zoologique de France," vol. x, 1885. 



II Wellington, 1873, p. 104. 



^ Trans.' and Proc. N.Z. Inst., vol. xii, 1879, p. 302. 



** Trans. N.Z. Inst., vol. xxxv, 1902, p. 263. 



