liatojiora awl ita A/fits. g] 



Tlic pit in tlic common Batopora lun/liradiu/a is found to 

 continue tl»rouj;li the two Isiyera, for the miituri* zoarium 

 consists of two or niorc hnyers, as (K'sciibcd Ijy Rcuss and 

 as fi^Mircd by nu.- * (sec also 1*1. VI. fijr. 1). As' the mature 

 mulHradiata is two-hiycred, wc shonhl he able to find an 

 earlier sta;^e, and to do so 1 ai^ain searched through material 

 from dillereut places where it occurs, and in njost cases found 

 a small jjlobular liaio/jora, which is what I determined as 

 7i. stn/ii'zkai, Hss., thou;;h what were tak<'n to be appendaf^es 

 arc i)robably yonnji; zooccia in cour.se of formation and are 

 n-it always found, and then there seems to l)e no material 

 difference from />. rusuia, Kss., so that perhaps roiula and 

 stoUczkai are syn«)nyras. The possibility of a j^lobular 

 Batopora bein;j; the first stage was foreseen by Reuss and 

 also by me, but at that time was rejected. 



Tlic primary is well within this {^lobular form. I have 

 found a very similar pit in Urbitulipora lenticu/in'is, Rss., 

 from Moutccehio Mag<<iore, but in a very different position — 

 namely, near the; periphery dii*ected towards the middle of 

 tlie zoarium, and in Orbilulipora petiohis one has been 

 figured by Dixon f and by Gregory X at the side. On p. 92 

 it is seen to be continuous from the centre to the circum- 

 ference of the zoarium, MacCJillivray § and Maplestone || 

 speak of there sometimes being more than one pit in S. fossa, 

 but 1 have seen nothing of the kind. Perhaps they hacl 

 found a true Cellepora. Is there any other explajiation of 

 t'liese pits, except the perforating Actinid? The large 

 pores in the pits, with their tuljc or chamber leading to tlio 

 zoQicia (PI. W. figs. 3, -1), is undoubtedly a point of much 

 importance, and the e«planation now offered is that tluse 

 ])ores indicate the attachment of radicles, which together 

 form a solid bundle such as we know in various Bryozoa ^. 



The shape of the oral aperture (0*12 mm.) and of the 



• North Ital. Bryozoa, p. .'W, Hgure la text ; Quart. Juurn. Geol. Soc. 

 vol. xlvii. (IsOl). ' 



t Geol. & Fossils of Ttrt. ii Cret. Form, of Sussex, p. 151, pi. i. fig. 10 

 (18o0). 



\ Brit. Pal. Brv. pi. xxxi. figs. 12, 13. 



§ "Ttirt. Toly.'of Vict.," Trans. K. Soc. Vict. p. 108 (180.">\ 



|l "New or little-kuown Polyzoa," I'roc. R. S. Vict. vol. xxv. p. 3<il 

 (ini3). 



51 I'reparivtions had been made, nnd the drawin^fs for Plates completed, 

 before I hud an idea of any tlu'ories of Canu and lJa.'*.-'ler. In a sliort 

 letter from Canu, he .seems to have como to the conclusion that C'wj- 

 racharcllina and some other <r('nerii lived witii the ajx.'X of the cone Ix-low, 

 a:,d were attached, as partly suggesti-d by d'<Jrhigiiv. I see that there 

 will be points of agreement between us, but 1 am awaiting their complete 

 Work. 



Ann. cC Maij. X. Hist. Ser. 'J. Vol. iii. G 



