NOETH-ITALIAN BKTOZOA. 15 



the zooecia are not always arranged quite as diagonally as in that 

 recent form, yet the diagonal arrangement is usually seen. The 

 fossil differs from the recent species in the shape of the " special 

 organs," which, instead of being a small triangular avicularium 

 placed diagonally, seems to have been a vibraculura ; at any rate, 

 below the zooecial area there is an eminence with two almost equal 

 pores in the line of the zoarial axis. 



There is a suboral slit on one side only of the area. The zooecia 

 are usually arranged on the four sides of the axis ; but in one case 

 they are only on two sides, in this respect resembling Diplodidymia 

 coinplicata, Ess., from the " Oligocan " of Gaas, and the Cellularia 

 diplodidymoides of Meunier and Pergens from the Chalk. We have 

 thus four closely allied forms, with similar-shaped zooecia, placed 

 diagonally, with a long suboral slit on one side and a special organ 

 below the aperture. 



23. MiCEOPOKA CTJCTJLLATA (ECUSS). 



Cellaria cucuUata, Eeuss, Foss. Poiyp. Wien. Tert. p. 60, pi. vii. 

 fig. 31. 



Vincularia cucullata, Manzoni, Brioz. foss. Mioc. d'Austr. ed Ung. 

 p. 69, pi. XV. fig. 50, pi. xvi. fig. 53. 



Escliara costata, Eeuss, loc. cit. p. 72, pi. viii. fig. 37. 



Escliara Reussi, Stoliczka, Olig' Eryoz, von Latdorf, p. 88 ; 

 Eeuss, Fauna des deutschen Oberoligocans, p. 36. 



Vlncidaria Haidingeri, Eeuss, Bryoz. von Crosaro, p. 275, 

 pi. xxxiii. figs. 14, 15. 



Bijiustra sulcata, Gottardi, Brioz. foss. di Montecchio Maggiore ; 

 Atti d. Soc. Yeneto-Trentina di Sc. Nat. vol. ix. fasc. ii. p. 305, 

 pi. xiv. fig. 2. 



Steyanoporella elegans, Koschinsky, Bryoz. alt. Tert. siidl. Bayerns, 

 p. 33. 



2 Eschara elegans, M.-Edw. Ann. Sc. I^^at. ser. 2, vol. vi. p. (17) 

 337, pi. xii. fig. 13. 



Micro]Dora cucuUata, Pergens, Bryoz. von Wola Lu'zanska, p. 67. 



Salicornaria (^Cellaria) cucuUata, Gioli, Brioz. j!*^eogenici dell' 

 Isola di Pianosa ; Atti Soc. Tosc. Sc. J^at. vol. x. p. (10). 



Besides the erect zoaria in the Vincidaria-foim., there are in- 

 crusting specimens from both Val di Lonte and Brendola. In the 

 erect and incrusting zoaria the ordinary zooecia are similar in size 

 and shape; but the zooecia which we conclude are ovicelligerous 

 are somewhat larger and wider in the incrusting specimens ; 

 perhaps, however, this is to be accounted for by the conditions of 

 growth. The large zooecia have a large shelf above the aperture. 

 The proximal edge in the ordinary zooecia is much thinner than 

 the distal border, but is continuous, so that the appearance is 

 entirely that of Micropora ; on the other hand, the broad ovicellular 

 cells are like those of recent Steganoporella magnilahris, and I am 

 unable to find grounds for separating these two genera. 



