270 
Mr. A. W. Waters on the 
Loc. Miocene: Eisenstadt, Steinabrunn, Val di Lonte, 
Montecchio, Maggiore (Italy). Living: Arctic (Seas, Shet¬ 
land ; Naples, 40 fathoms (only one piece). 
86. Iclmonea marionensis , Busk. 
Idmonea marionensis, Busk, Cat. Mar. Polyz. p. 13, pi. xiii. figs. 3-5, 
pi. vii. figs. 7, 8. 
The British-Museum specimen has four cells in a series, 
although the diganosis in the Catalogue gives two to three. 
I have a few specimens from Naples, one of which exactly 
corresponds with the Museum specimen. 
It differs from 7. atlantica chiefly in the series being further 
apart (viz. 0*7 millim.). The dorsal surface is usually round ; 
but this varies with age. 
I have a species, in habit much resembling the typical 
marionensis , which has six cells in a series and the dorsal 
surface flat. 
This is not the Crisina Hochstetteriana of Stoliczka, fossil 
from New Zealand, which has large pores somewhat resem¬ 
bling those common in llornera. 
Hah. Marion Island, 80 fathoms (7?.); Naples, 40 fathoms, 
not common. 
From the diagnosis it would seem as if Mr. Busk had 
written it from some material more nearly corresponding with 
Crisina Hochstetteriana , Smitt (non Stol.), than the specimen 
mounted, which has cells all down the two sides. 
87. Iclmonea irregularis , Menegh. 
Idmonea irregularis , Menegliini, Polipi della fam. dei Tubul. p. 12 ; 
Acad, di Sc. di Padova, vol. vi. 
Idmonea irregularis, Heller, Die Bry. des Admit. Meeres, p. 121. 
Idmonea irregularis, Busk, Cat. Mar. Polyz. pt. iii. p. 13, pi. xii. 
P Filisparsa Pourtalesii, Smitt, Floridan Bryozoa, p. 9. 
Zoarium dichotomously branched ; branches round ; mostly 
four cells in each lateral series, the outside cells the longest; 
these are nearly at right angles to the axis of the zoarium, 
and are very prominent and conspicuous; dorsal surface 
rounded, and the divisions of the cells inconspicuous. Cells 
between the lateral series irregularly placed. 
Ilab. Adriatic (il7. & 77.) ; Mediterranean ( B .) ; Naples, 
common, from 40 fathoms ; Tortugas? ( 8m .). 
88. Idmonea Meneghinii , Heller. 
Idmonea Meneghinii, Heller, Die Bry. des Adriat. p. 120, pi. iii. figs. 6, 7. 
The dorsal surface is normally fiat, or slightly concave and 
striated; but the growing ends are convex, as is also the basal 
