BRrOZOA PROM NEW ZEALAND . 



69 



fig. 15, a, b ; Reuss, Foss. Polyp, des W. Tertiarbeckens, p. 76 

 pi. ix. figs. 11-15 ; Reuss, Foss. Fauna St. von Wieliczka, p. 94 ; 

 Manzoni, Bri. foss. del Mioc. d'Aust. ed Ungh. p. 51, pi. i. fig. 2. 



Cellepora retusa, Manzoni, Bri. del plioc. ant. di Castrocaro, p. 35, 

 pi. v. fig. 59. 



Cellepora retusa, Manz., var. caminata, Waters, Ann. & Mag. Nat. 

 Hist. ser. 5, vol. iii. p. 194, pi. xiii. fig. 1. 



Cellepora rota, MacGillivray, New or Little-known Polyzoa, pt. viii. 

 p. 11, pi. iii. fig. 6. 



There are two adnate convex zoaria, fossil, from Napier, about 

 12 millim. in diameter. In most zooecia the aperture is unarmed, 

 though in a good many there is an avicularium at one side, and 

 these cells exactly correspond with Manzoni's figure of Cellepora 

 globularis (I Bri. Mioc. Aust. Xing. p. 51, pi. i. fig. 2) ; there are, 

 however, a few zooecia with an oral avicularium at each side. 



In some specimens of what I may call the typical Cellepora globu- 

 laris, which I collected from the Miocene of Nussdorf, near Vienna, 

 there are nearly always two lateral oral avicularia, but a few 

 zooecia have only one, thus again corresponding with Manzoni's 

 figure. When these Nussdorf specimens have the two avicularia, 

 the appearance is just the same as in some cells of C. retusa, 

 var. caminata, W., which, however, more frequently has three 

 avicularia. We are thus able to trace the unbroken connexion 

 between the New Zealand fossils, in which the aperture is nearly 

 always unarmed, and the recent Naples form, in which there are 

 usually three very prominent oral avicularia. In all cases the oral 

 aperture is deep down in the peristome. 



I have a recent specimen from Port Phillip Heads with long 

 branches, seldom with oral avicularia, but when • they occur the 

 mandibles are semicircular. I had not at all recognized the simi- 

 larity until I prepared out the opercula, which are characteristic and 

 correspond with the Naples specimens. The apertures are larger 

 than those of the fossils, which measure about 0*08 millim. In this 

 Port-Phillip-Heads species there are large spatulate avicularia. 



The connexion was thus independently traced up in the fossils by 

 means of the oral avicularia, and in the recent forms by the opercula 

 and other chitinous organs. 



I have been in doubt as to whether this should be called C. costata 

 or globularis ; but as it is by means of direct comparison of typical 

 specimens rather than by the descriptions that I have worked up 

 the synonymy, the name costata is retained. 



Loc. Living: Wilson Promontory and Queenscliff, Victoria 

 (MacG.); Port Phillip Heads {MacG. Sf A. W. W.); Glenelg, S. 

 Australia {A. W. W.); Naples (IF.). Fossil: Nussdorf (A. W. W.) 

 and numerous other Miocene localities of Austria and Hungary 

 (Beuss Sf Manz.) ; Pliocene of Italy {Manz. Sf W.) ; Adelaide, Aus- 

 tralia ; Napier, New Zealand. 



76. Cellepoea decepta, sp. nov. (PI. VIII. fig. 33.) 



There are two unsatisfactorily preserved specimens from Napier. 



