Zoology.^ NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 146, Fig. 5. 



CLAVIPORELLA PULCHRA (McG.). 



[Genus CLAVIPORELLA (McG.). (Sub-kingdom Mollusca. Class Polyzoa. Order 

 Infundibulata. Sub-order Cheilostomata. Family Catenicellidas.) 



Gen. Char. — Branches springing, usually, from the summits of the zocecia of a geminate 

 pair, but, occasionally, from tbe sides of single zooecia. Zocecia single or geminate ; usually a 

 large lateral process on each side above, supporting a large, gaping ayicularium, occasionally 

 small, altered or aborted ; mouth narrow, arched above, contracted below, and extending down- 

 wards as a deep notcb, giving the whole a key-hole appearance ; usually several blunt, hollow 

 processes above and to the side of the mouth.] 



Description. — Zoarium very small j branches originating either from the 

 summits of geminate zooecia or from the sides of ordinary zocecia. Zocecia vase- 

 shaped, with, usually, a wide lateral process on each side, turned slightly forwards 

 and supporting a gaping avicularium ; mouth narrow, with the oral sinus very 

 narrow and with a tumid border ; two blunt, mamilliform processes on each side of 

 the mouth; a central, vertically-elongated pore in the front of the zooecium, the rest 

 of the surface papillose, with the papilla? generally larger in the neighbourhood of 

 the central pore ; posterior surface smooth. 



Reference. — P. H. MacGillivray, Trans. Roy. Soc. Vict., July 1886. 



Port Phillip Heads, Mr. J. Bracebridge Wilson. 



At once distinguished from the other species by the smaller and 

 narrower zocecia. It is the only species in which I have seen the 

 branches originate from the sides of zocecia. 



Explanation of Figure. 

 Plate 146. — Fig. 5, portion of branch showing the anterior surface, magnified. 



Plate 146, Fig. 6. 



CLAVIPORELLA IMPERFORATA (McG.). 



Description. — Zoarium small ; branches originating from tbe upper extremity 

 of each of the zocecia of a geminate pair. Zocecia broadly vase-shaped ; a wide, 

 gaping avicularium (frequently differing in size or wanting) at each upper- angle ; 

 mouth rather wide, oral sinus small ; two mamilliform processes on each side of the 

 mouth ; front of zocecia papillose, usually a few of the papillae towards the centre 

 larger, and, when worn, forming pore-like marks, but no proper central pore. 

 Posterior surface smooth. Ocecia galeate, tubercular, either surmounting the 

 terminal zooecium of a branch or one in its continuity ; in the former case the upper 

 outline rounded, in the latter a wide, gaping avicularium at each upper angle. 



Reference. — P. H. McGillivray, Trans. Roy. Soc. Vict., July 1886. 



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