ME,. ALDER ON NEW POLYZOA. 63 



makes it necessary to give another name to the species now under 

 consideration. 



E. pavonella, like the foregoing species, is sometimes found 

 assuming all the three forms of a Lepralia, a Hemeschara, and an 

 Eschara, according to the suhstance on which it is developed, 

 often clasping the stems of zoophytes in a single layer before 

 rising into a double foliaceous expansion. It is a deep-water 

 species, only yet found on the north-east coast of England, rang- 

 ing from Cullercoats to Scarborough, and extending eastward to 

 the Dogger Bank. 



The specimens from which Professor Busk's larger figures were 

 taken are in the Newcastle Museum. 



Eam. CELLULARIAD^, Bush. 



ScEUPOCELLAKiA Delillt, Audouin. PI. VIII, figs. 4-8. 



Polyzoary slender, shining, dichotomously branched, conspicu- 

 ously jointed, the internodes containing from five to ten cells 

 each. Cells ovate, narrowed below j apertures oval, with smooth 

 margins, bearing one stout spine (or sometimes two) on the upper 

 and outer margins, and a smaller one on the inner margin. Oper- 

 culum ovate, channelled with tubes, forming a lobated cavity. 

 Marginal avicularia moderately prominent : there is also a tubu- 

 lar or conical avicularium in the centre, in front of each cell. 

 Vibracular capsules (sinus of Busk) transversely wedge-shaped, 

 stretching across the back of a cell and part of the adjoining one. 

 Vibracula short, rising from the upper and outer angle of the 

 capsule, below which is an aperture for one of the radical fibres, 

 which are numerous, and scattered over the whole of the branches. 

 Ovicdls small, smooth, and imperforate. Height half an inch. 



Crista Deliln, Aud., in Savigny's "Egypt" (fide Busk). 



Cellular ia scrupea, Alder, in Trans. Tynes. Club, vol. Ill, 

 p. 148. 



Scrupocellaria Belilii, Busk, in Jour. Micros. Sc, vol. VII, 

 p. 65, T. 22, figs. 1, 2, 3. 



I obtained specimens of this delicate little Scrupocellaria a few 



