Art. XII. — Descriptions of New, or Little Known, Polyzoa. 



Part IX. 

 By P. H. MacGillivray, M.A., M.R.C.S., F.L.S. 



[Read 12th November, 1885.] 



Family Gemellariid^:. 



Dimetopia hirta, n. sp. 



A form of Dimetopia has been sent to me by Mr. J. B. 

 Wilson, which, although allied to D. cornuta, ought to be 

 described as a new species. The cell aperture is rounder 

 below, the margin much thicker, and the spines much more 

 developed. Of these there are one or two on the lower 

 margin, three above, of which the middle is longest, and 

 three or four on each side ; the uppermost usually situated 

 further back, and directed more posteriorly. 



Family Notamiid^:. 

 Cahuellia gracilis, Maplestone. 



Zocecia very long and slender ; anterior surface flattened ; 

 a short, thick process, supporting an avicularium, on each 

 side above. 



Portland, Mr. Maplestone; Port Phillip Heads, Mr. 

 "Wilson. 



This species, which seems to be very rare, was described 

 some years ago at the Microscopical Society by Mr. Maple- 

 stone, but his paper has not been published. It differs from 

 G. bicornis in the zocecia being longer, very much more 

 slender, and flat in front. The branches are also more 

 straggling. 



Family Cellulariim:. 



Menipea funiculata, n. sp. Plate I., Fig. 8. . 



Zoarium continuous, dichotomously branched, branches 

 narrow, margined by radical fibres. Zocecia multiserial, 

 elongated, aperture large, elliptical, with a slightly- thickened 

 margin, and overlapped by a large sacculated fornix. On 



