Ch(ith(tin Island awl (.r Uri'ille UaihI. 17 



of I'Jsc/tara Lnwrsidiiei of Tenisou-Woo(l.s is so poor that we 

 cuniiot now be sure what he described. MHc(jrillivray lias 

 iuii(U> a slip in unitiiif^ my Micmjtorel/a fcrrea with //. Llver- 

 s'uh/ci, as my species was Diporala as we now muh-rstaiid it. 

 Perhaps \\v shall have to consider Liversiilyei as a variety (jf 

 vKJitocennt. 



From the " Chatliam Island, Jan. 1897," there are 

 specimens with only tlic three larj^c pores and some with 

 many pons, and in these the zoaicia are somewhat s;iialler. 

 In both there are larj^e avicnlaria with obtuse triangular 

 avieuhiria. The avieularian chamber is about as lar;;e as a 

 zoocciuui. The specimen from Maunganui, Chatham Island, 

 has three to five large pores. In neither do 1 find any 

 ovieells, but the large articulated spine is at the side of the 

 mouth within the peristome, as is usual in //. monoceros. 



Mirroporella Mulusii (Aud.). 



A specimen from Maunganui, Chatham Island, has much 

 smaller pores than arc usual in M. Malns'il, And., and thev 

 arc not comi)letely stellate, though there: are some denticles, 

 indicating a conimencemeut of the stellate structure. The 

 pores arc usually in a single row near the margin of the 

 zooecium, and there is a row under the oral aperture. la 

 some respects this a[)proaehes to M. purvipora, Waters. 



From French Pass, d'Urville Island, New Zealand, the 

 pores are larger, with indications of stellate structure, and 

 there is a line forming an area within which the stellate 

 ])ores occur much the same as in the specimen from Chili 

 figured in my " Bryozoa," Exped. Antaret. Beige, p. 42, 

 ])1. iii. figs. A:a-d. Since then Calvct has added several 

 Magellan and Tierra del Fuegj localities. 



Micropurella ciliata, L. 

 Hub. Maunganui, Chatham Island. 



Lepralia cllvusa, sp. u. (PI. I. figs. 1-7.) 



Zoarium adnate on stone. Zooecia quincuncially arranged, 

 subhexagonal ; in the older zooecia the divisions are indistinct ; 

 the front of the zoceeium is much raised, with a very thick, 

 tall, calcareous process, and up to these there are indistinct 

 ribs with a pore between them near the border, while in the 

 younger zooecia there are pores at the border. The oral 

 aperture is very large, nearly cir(;ular, w ith large semicircular 

 avieularium within the aperture^, and scattered over the 



Ann. d; May. N. Hist. Ser. 7. Vol. xvii. 2 



