NORMAN, ON RARE BRITISH POLYZOA. 215 



Scrupocellaria Delilii, Busk. Jour. Mic. Soc, vol. vii, p. 



65, pi. xxii, figs. 1 — 3 (but not C. 



Delilii of Audouin). 

 — — Alder. Quart. Jour. Mic. Sci., N. S., 



vol. iv (1864), pi. iii, figs. 4—8; 



Nat. Hist. Trans. Northumberland 



and Durham, vol. i, p. 163, pi. viii, 



figs. 4 — 8. 

 Cellularia scabra, Smitt. Ofversigt af K. Vet. Akad. Forh., 

 1867, p. 283, pis. xxvii — xxxiv. 



The species described by Busk and Alder is most certainly 

 not the Crisia Delilii of Audouin (Savigny, ' Egypt,^ pi. xii, 

 fig. 3), Avhich is characterised by an unusually developed 

 lateral avicularium, and an erect vibracular capsule, while in 

 the Madeira and British species the avicularium is not 

 larger than usual in the genus, and the vibracular capsule is 

 large and placed transversely. Mr. Alder had not seen 

 Savigny's figure, and ascribed his specimens to S. Delilii, 

 fide Busk. 



ScRUPOCELLAEiA iNERMis, No7'man. PI. V, figs. 1 — 3. 



Scrupocellaria inermis, Norman. Heport of the British 



Association, 1866 (1867j. Report, 

 p. 203. 



Polyzoary rather stout, yellowish horn-coloured, dichoto- 

 movTsly branched. Cells oblong ; apertures elliptical, having 

 a broad flattened margin without spines or operculum. 

 Marginal avicularia not prominent ; no central avicularium. 

 Vibracular capsules subtriangular, scarcely so broad as high, 

 with the open margin, stretching diagonally downwards and 

 inwards ; vibracula short. Ovicells smooth and imperforate, 

 set at a slight angle inclining inwards. Height about half 

 an inch. 



One or two small specimens of this Scrupocellaria were 

 dredged by Mr. Jeffi-eys and myself in Shetland in 1863, 

 and it was again found in the following year by Mr. 

 Peach. In 1866 I met with a small specimen when dredging 

 in the Minch. Its characters come very near to those of 

 S. scruposa, but it difi^ers in its more robust form, in the 

 broad flattened margin of the apertures, and in the absence of 

 spines ; the marginal avicularia are less prominent, and the 

 vibracular capsules are broad and triangular, with the open 

 margin extending diagonally downwards. This last is, ])er- 

 haps, the best character to distinguish the two species, as the 



