26 MR. A. W. WATERS ON 



Porina j^cipillosa, Koschinsky, Bryoz. iilt. Tert. siidl. Bayerns, 

 p. 37. 



The zoarium is narrow at the base, and here there are numerous 

 openings, showing that there was an attachment by means of 

 ehitinous tubes*'. The zooecia, as seen at the side, are alternate. 



In the best cleaned specimens I have but very rarely been able 

 to find any suboral pore, though certainly occasionally there is a 

 pore larger than the others, and in imperfectly cleaned specimens 

 the lower part of the avicularium might bo mistaken for a pore. 

 Neither have sections revealed any such pore. We may, however, 

 remember that in Tuhucellaria cereoides the pore can be distinctly 

 seen on the surface in some zooecia, but not in all, though sections 

 show that in all cases there is below the aperture a pore wider 

 than the others and readily distiuguished in structure. 



At the side of the zooecia, resting on the peristomial projection, 

 there is a long acute avicularium. 



The peristome is often very much raised, forming a long tubular 

 projection, which may eutirel}'' curve over (fig. 19, a), and then the 

 opening is wide and slit-like, jN"either Reuss nor Koschinsky has 

 fully appreciated this, and they have merely described these cells as 

 closed, which is sometimes the case. A similar prolongation occurs 

 in various Tuhucellarice, and has been described and figured by both 

 Busk and myself (see Ann. Mag. 'Nut. Hist. ser. 5, vol. xx. p. 190, 

 pi. V. fig. 10). Yery often one row has all the zooecia prolonged, 

 the next plain, and the following one again raised, and so on; so 

 that the raised rows are easily seen with the naked eye. 



Sections show that just above the oral aperture the peristome 

 expands internally on the proximal side, as if there had been a 

 small chamber, thus reminding us, on a smaller scale, of the ovicell 

 of Turritigera stellata, B. 



Pergens gives this as a synonym with EscJiara cervicornis (Plioc. 

 Bryoz. von Bhodes, p. 25) ; but they are very different things. 



In the recent Tuhucellaria cereoides there is only one of the glands 

 to which I referred in my ' Challenger ' Suppl. Report, pp. 2 & 27 ; 

 and to these glands I hope shortly to refer elsewhere, having cut 

 sections of a number of species with the object of finding how they 

 occur. 



Both this and P. coronata present us with so many difficulties 

 with regard to characters, showing relationship with Tuhucellaria, 

 that the recent Tubucellaria must be re-examined with this object. 



Loc. Brendola ; Montecchio Maggiore ; Yal di Lonte ; Ilonzo ; 

 Crosaro ; Male ; Gotzreuth ; Oberburg ; IsTeustift (Kosch,). 



48. PORIXA (?) T3I0CULATA, Sp. UOV. (PI. III. fig. 15.) 



A small specimen from Brendola is incrusting. Zooecia not much 

 raised, with peristome prolonged into a kind of neck, on the front 

 of which are two large pores. On one side, about halfway down 



* Ivoscbinsky says, p. 37, that " Sie sind imit verbreiterter Basis festge- 

 wachsen ; " but this I liave never found to be the case. 



