42 



ME. A. W. WATEES 0~N TEETIAEY CHILOSTOMATOTJS 



the classification of the Chilostomata, there are many points which 

 require modification, and the peristomial characters all seem too 

 variable to be used for -wider classification. 



A list of recent New-Zealand Bryozoa has been drawn up by 

 Professor Hutton (Man. of N. Zealand Moll., Col. Mus. & Geol. 

 Surv. Dept. 1880), and a large number have been described by 

 Hincks in the ' Annals,' and some by Busk in the ' Challenger ' Report, 

 besides which, as already said, I have had the opportunity of ex- 

 amining a series, and now our knowledge of the Australian and New- 

 Zealand fauna is being constantly increased by MacGillivray, Hincks, 

 and other workers, so that, although much remains to be done, we 

 are now gaining a fair knowledge of the Australian fauna. We 

 must, however, always remember that in giving the proportion of 

 any fossil series known living, this can only refer to the state of 

 knowledge at one time ; even since I commenced writing on the 

 Australian fossils, dredging has brought to light several species at 

 first indicated as only known fossil, so that the proportions then given 

 are somewhat changed. 



Besides those mentioned in this and previous papers, Microporella 

 coscinopora, var. armata, has been found near Port Phillip Heads and 

 Queen's Cliff. Porella emendata, Waters, has been described in the 

 ' Challenger' Report (p. 155, pi. xx. fig. 5) as Mucronella pyriformis. 

 Mr. Busk does not mention any avicularia, but in a specimen 

 from Port Western I found avicularia to a few cells, placed diagonally 

 as in the fossil. The fossil and recent forms agree in size and every 

 particular. 



Cellaria ovicellosa, Waters, has been sent to me recent from Aus- 

 tralia by Miss Jelly, and is, no doubt, the Salicomaria hicornis of the 

 4 Challenger ' Report (p. 90). 



Membranipora articulata, Waters, has since been described b}< Mr. 

 Hincks as Farciminaria appendiculata ; and I would take the oppor- 

 tunity of again urging the importance of decalcifying recent specimens, 

 for often, as in this case, a very different appearance is given and fresh 

 and important characters are seen. If this had been done, Mr. Hincks 

 would have seen points which have escaped him, and, I think, would 

 then have recognized that the species had already been described. 



Micropora cavata, W., is Aspidostoma yiganteum, Busk. In each 

 paper fresh instances of species with two or more modes of growth 

 have been given ; such cases are constantly coming before me and 

 new ones are mentioned in this paper. Recently Dr. Jullien * has 

 made an important addition to our knowledge of the freshwater 

 Bryozoa, and shown that, trusting to the mode of growth, a classifi- 

 cation has been used which would often bring various specimens of 

 a species under different genera, and that a revision similar to that 

 which has been made of the Chilostomata is necessary with the 

 Endoprocta. 



Enough is not yet known about the New-Zealand and Australian 

 Bryozoa to be able to fix their exact age with certainty, and this 



* "Bryozoaires d'eau douce," par Dr. J. Jullien (Bull. Soc. Zoo], de France 

 t. x. 1885). 



