Notices of Memoirs — G. R. Vine on Fossil Poli/zoa. 473 



with modern usage and applicable to Paleozoic species. In accord- 

 ance with the spirit of this request the following terms may be 

 accepted generally. In it I have followed the leading of Busk and 

 Hincks, without wholly despising the terms used by our leading 

 Palgeontologists. 

 ZoARiuM. — " The composite structure formed by repeated gemmation," =PoIyzoarium 



and Polypidom of authors. 

 ZocEciuM or ceil. " The chamber in which the Polypide is lodged." 

 CcENCECiuM. "The common dermal system of a colony." Applicable alike to the 



" Frond," or " Polyzoary," of Fenestella, Polypora, Phyllopora, or Synocladia : 



or to the associated Zooecia and their connecting " interstitial tubuli," of Cerio- 



pora, Hyphasmapora, and Archteopora, or species allied to these. 

 Fenbstrules. The square, oblong, or partially rounded openings in the zoarium, 



■ — connected by non-cellular dissepiments, — of Fenestella, Polypora, and species 



allied to these. 

 FENESTRiE applied to similar openings, whenever connected by the general substance 



of the zoarium— as in Phyllopora, Clathropora, and the Permian Synocladia. 

 Branches. The CELL-bearing portions, of the zoarium of Glauconome, Fenestella, 



Polypora, or Synocladia ; or the ofE-shoots from the main- stem of any species. 

 GoNCECiuM. ' ' A modified zooecium or cell, set apart for the purposes of reproduction.' ' 

 GoNOCTST. "An inflation of the surface of the zoarium in which the embryos are 

 developed." Modern terms from the Eev. Thos. Hincks, F.R.S. 



I have no desire to discuss my use of the term ' Polyzoa ' instead 

 of ' Bryozoa.' I use it as a matter of choice after carefully con- 

 sidering all that has been said by my friend Mr. Waters, Hincks, 

 Busk, and others. After all, the question of priority is still an open 

 one, and those of my readers who desire to consult authorities will 

 find ample material in a paper ' On the Priority of the term Polyzoa 

 for the Ascidian Polypes,' Busk, Ann. Nat. Hist., 1852 ; Eev. T. 

 Hincks' ' Brit. Marine Polyzoa,' p. cxxxii ; and A. W. Waters, Ann. 

 Nat. Hist., January, 1880. 



Sub-order Cheilostomata, Busk. 



Genus Hippothoa, Lamx. 



Hippoilioa inflata, Nicholson, Ann. Mag. Nat. Hist., February, 1871, 



pi. xi. fig. 4. 

 Alecto ivflata, Hall, Pal. New York, vol. i. p. 77, pi. xxvi. figs. 7tt-7&. 

 This species of Hall's has been reworked from fresh material, by 

 Nicholson. The slight figures given by him show a habit nearly 

 akin to Hippotlioa abstersa, S.W., fig. 6, pi. 22, Busk's ' Crag 

 Polyzoa,' only rather more swollen at the distal part of the cell. 

 In the cell-mouth of Busk's figure the peristome is sinuated : in 

 Nicholson's figure it is circular. There is also a resemblance to 

 Gold fuss' Aulopora dichotoma, tab. 65. fig. 2. 1 know of no species 

 of Jlippothoa, recent or fossil, with which it can be otherwise fa- 

 vourably compared. Generically it has no affinity with the Htppo- 

 THOiD^ of Busk, and without doing violence to the generic character 

 of Hippothoa as given by Hincks,^ it cannot be placed with the 

 genus. The species, Nicholson says, is abundant in the Cincinnati 

 Group of the Hudson River formation, near Cincinnati, Ohio. 



Genus Betepora, Imperato. 

 Ever since this genus was introduced in 1559, it has been used, 



1 Brit. Mar. Poly. p. 286. 



