Zoology.-] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Smitt first proposed the genus Escharipora for species of 

 CrihrUina (Gray) which he again referred back to that genus in 

 the Floridan Bryozoa. He there retains Escharipora for the 

 present and another species, E. mucronata^ which he doubtfully 

 phaces with it, referring also to the same genus Eschara lichenoides 

 (Busk, not M. Edwards) and E. distoma. At present, at any rate, 

 I think it is better to keep this species under Escharipora, of 

 which it may be taken as the type. It forms the transition between 

 31icroporeUa and Adeona and AdeoneUopsis (McG.). The avicu- 

 larian mandibles have no projecting articular processes as are found 

 in Adeonellopsis, but not, so for as I am aware, in the true Micro- 

 porellcB. These processes are not, however, as Busk supposed, 

 confined to the Adeona group. I cannot agree with those authors 

 who would unite Adeona and Adeonellopsis with Microporella for 

 the sole reason of the jiresence of zooecial pores, as, besides the 

 multiple or simple presence of these pores, there are other important 

 differences which will be discussed when describing Ad,eonellopsis. 



Explanation of Figure. 



Plate 175. — Fig. 12, Group of zocEcia before calcification -has so far advanced as to cause 

 depression of tbe zooecia. 



The specimens and descriptions of the species figured in this 

 plate have been contributed by Mr. MacGillivray. 



Frederick McCoy. 



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