Marine Polyzoa of Victoria, 191 



out, and includes E. gracilis in Porina. The other species 

 which Mr. Hincks refers to Porina ("British Marine Poly zoa," 

 p. 229) certainly belong to the same genus as E. gracilis. 

 The best known, P. borealis, was first described as an 

 Onchopora by Busk, then made the type of a new 

 genus — Quadricellaria — by Sars, and, that having been 

 already used for a totally different set of species by 

 D'Orbigny, was again referred to another new genus — 

 Tessaradoma — by Norman. The last name is the one 

 which, according to all the rules of nomenclature, ought 

 to be adopted, notwithstanding that it is etymologically 

 incorrect. 



The large family of the Eschariclce I have arranged under 

 three sub-families — Schizoporellince, equivalent to the 

 Myriozoidce of Hincks (whose name I do not adopt, as I am 

 doubtful whether Myriozouni ought to be referred to the 

 group), characterised by the plain mouth, with a sinus in 

 the lower lip, and without any special development of the 

 peristome ; Lepraliince, where there is a plain semicircular 

 or subcircular mouth without sinus or special peristome; 

 Siiid Mucro7ieUince, distinguished by the growth of a distinct 

 peristome developed in various ways. I had intended 

 proposing a new genus for my Eschara ohliqua, when Mr. 

 Wilson informed me that it was mentioned under the 

 appropriate name of Parmularia in a letter from Mr. Busk, 

 and I have, therefore, adopted his MS name, although 

 I am not aware that it has ever been published. In the 

 Mucronellince, Busk's genus Adeonellai^ difficult to differen- 

 tiate from Porina, unless it be that the lower lip of the 

 primary mouth has a sinus, and of that, except in A. dispar, 

 I am doubtful. The whole appearance is different, and in 

 Adeonella the mandibles have the small articular processes 

 pointed out by Busk. 



In the catalogue I have throughout referred to my descrip- 

 tions in Professor M'Coy's " Prodomus of the Zoology of Vic- 

 toria," to the late Mr. Busk's " British Museum Catalogue" 

 and " Polyzoa of the ' Challenger' Expedition," and to the 

 "British Marine Polyzoa" of Mr. Hincks. The reference to the 

 " Transactions of the Royal Society of Victoria" are to my 

 own papers. In a considerable number of the references the 

 species will be found under other generic names, especially 

 in those belonging to the divisions of the old genera 

 Meifnbranipora,Lepralia smd Eschccra. No confusion how- 

 ever, need arise from this. 



