14 MR, A. "SV. WATERS ON 



20. MicROPORA poLYSTiCHA (Reuss). (PI. II. fig. 7.) 



Cellaria ^olysticha, Eeuss, Foss. Polyp. Wieu. Tert. p. 61, pi. vii. 

 fig. 33. 



Escliara polysticha^ Eeuss, Bryoz. von Crosaro, p. 269, pi. xxxii. 

 fig. 3. 



2 Steganoj)oreUa simi^/s, Koschinsky, Bryoz. alt. Tert. siidl. Bayerns, 

 p. 34, pi. i. figs. 8-10. 



The zoaria vary considerablj'' in the number of rows of zooecia. 

 The zooecia are elongate, and about the same size and shape as 

 those of Micropora parallela, but differ from that species in the 

 absence of avicularia and in hft,ving opesiules. The opesiules in 

 some parts are not apparent, and in different specimens vary in 

 position, occurring sometimes about the middle of the zooecium, 

 but more usually only about one quarter of the way down. 



Although the zooecia of Steganoporella similis, K., are a trifle 

 larger, the characters are similar, and probably the}' should be 

 united. 



Log. Yal di Lonte (Rss,) ; Brendola ; Perrara di Monte Baldo ; 

 Montecchio Maggiore ; Gotzreuth (KoscJi.). 



21. MiCROPOEA PARALLELA (EcUSS). (PI. II. fig. 8.) 



EscTiara parallela, Eeuss, Bryoz. von Crosaro, p. 272, pi. xxxiii. 

 fig. 2. 



When properly cleaned a small triangular avicularium near the 

 oral aperture, directed downwards, is distinctly seen. Ovicell not 

 much raised, wider than a zooecium ; apparently there has been an 

 area on the front. "When sections are being made, the shell just 

 above the avicularium is seen to be thinner than the surrounding 

 parts, often giving the appearance of a peristomial notch, and this 

 can also be seen in some specimens without preparation. Zooecia 

 at the side of the zoarium alternate. 



The avicularia were overlooked by Eeuss, and since they do 

 not occur on all zooecia, and may be covered by the matrix, it often 

 appears as if there was only a pore, as described by Eeuss ; and 

 Pergens, thinking this was the case, has made the genus Houzeauina 

 for a fossil which he considered the same as the E. paraUela of 

 Eeuss. This is probably not identical with the Yieentine fossils, 

 as M. Pergens writes that the hole was "complet," and that 

 there was no avicularian chamber ; and no doubt I may be allowed 

 to say that, after seeing a specimen from my collection, he agrees 

 with my view. 



Log. Yal di Lonte ; Brendola ; Montecchio Maggiore ; Crosaro ; 

 Novezzina. 



22. Micropora articulata, sp. nov. (PI. II. figs. 5, 6.) 



Specimens from Montecchio Maggiore are about the same size as 

 the recent J/, ratoniensis *, Waters, from New Guinea. Although 



* It should have been Jcatoioensis, but the name of the locaHty was read 

 Eaton, and there does not now seem any reason to change it. Mr. Whitelegge 

 informs me that he has found it recent from Singapore. 



