OF THE FIRTH OF FORTH. 33 



beach sand between Portobello and Fisher- 

 row (F. E. ). 



Nonionina depressula (W. and J.). 



Off pier, Bo'ness (H. B. #) ; beach sand 

 between Portobello and Fisherrow (F.E.S). 



N. umbilicatula (Mont.). 



Beach sand between Portobello and Fisher- 

 row (F. E. S.). 



POLYZOA. 



Polyzoa are abundant in the Firth of Forth, in the coral- 

 line zone, and especially on the oyster bank, where some 

 species occur in profusion, and attain a large size. Notwith- 

 standing this richness in specimens, the number of species 

 hitherto recorded from the Firth is small, and the present 

 list is probably far from complete. We believe that many 

 of the smaller species will yet be found here, especially those 

 formerly united under the generic title Lepralia (as used by 

 Johnston in the " British Zoophytes"). 



We have followed the nomenclature and arrangement given 

 in Hincks' recent work on the British Polyzoa.* From this 

 exhaustive treatise we have derived much valuable assistance, 

 especially in the identification of species and the determina- 

 tion of their synonymy. 



We would tender our thanks to the veteran and well- 

 known marine zoologist Mr C. W. Peach, to whom we are 

 indebted for a list of the rarer species of Polyzoa which he 

 has obtained from the Firth of Forth. 



Several of our species are recorded on the authority of 

 Dr Kirchenpauer's report on the Polyzoa collected by the 

 German Expedition of 1872, which investigated the fauna of 

 the North Sea.*f These are marked (K.}. 



Dr M'Bain's lists in " The East Neuk of Fife " have again 

 contributed largely to the number of the recorded species. 



* " A History of the British Marine Polyzoa." By Thomas Hincks, B.A., 

 F.KS. London, Van Voorst, 1880. 



f II. Jahresb. d. Komm. z. Untersuch. d. deutsch. Meere in Kiel, 

 VI., Bryozoen. Berlin, 1874. 



