Art. XIII. — On Some New Species of Gatenicella and 



Dictyopora ; and on Uvceolipova, a Neiv 



Genus of Polyzoa. 



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



[Read November 18th, 1880.] 



In the present paper are described two species of Catenicella, 

 two of Dictyopora, and a new genus for which I propose the 

 name of TJrceolipora. The new genus resembles Calwellia 

 in its individual cells, but, unlike all the Gemellariidse, these 

 are not arranged in pairs, but alternately. I do not at 

 present, however, propose a new family for its reception. 

 The two species of Dictyopora, for which, with many other 

 additions to the marine fauna of Victoria, we are indebted 

 to my able and enthusiastic friend, Mr. J. Bracebridge 

 Wilson, will be fully illustrated in Professor M 'Coy's 

 Decades, as well as the previously known D. grisea. I retain 

 Dictyopora provisionally in the Escharidse, although I think 

 it will be advisable to constitute a new family, Adeonidas, 

 for the reception of this genus and Adeona proper. In this 

 connection I may mention that in consequence of our rapidly 

 increasing knowledge of the Victorian species and the many 

 new forms, especially in the Escharine group, I have thought 

 it advisable to adhere in the description of the Polyzoa 

 appearing in the Decades, as far as possible, to Busk's classi- 

 fication. When the descriptions and illustrations are com- 

 pleted, a systematic arrangement of the families and genera 

 can be more satisfactorily given than could be done at 

 present. 



Family, CATENIGELLIDjE. 

 Genus, Catenicella. 

 C. concinna. 

 Cells elliptical, or including the wide lateral processes, 

 vase-shaped. Mouth arched above, with a deep rounded 

 sinus in the nearly straight lower lip. A close series of 

 about 12 (5 or 6 on each side) rounded foramina, arranged 

 along the margin of the cell. The lateral processes are very 

 wide, extending the whole length of the cell; they are 

 divided into two portions by a partition extending out- 

 wards and downwards from the top of the cell, the upper 



