Natural History of East Finmark. 109 
Escnartna, H. Milne-Edwards, 1836. 
= Herentia, Gray, 1848 (first species H. Hyndmanni),= Mastigophora, 
Hincks, 1877 (type M. Hyndmannt). 
Type, EH. vulgaris, Moll. 
Levinsen (“Studies of Bryozoa,” p. 26) removes Alderi 
into Mastigophora, and I have now heard from him that he 
would also place in it vulgaris, which, with its keyhole- 
shaped oral opening and vibraculoid avicularia, which are 
situated unusually low down on the zocecium, comes very 
near Hyndmanni. When Hincks made his genera he ought 
to have employed Herentia and Escharina, instead of estab- 
lishing Mastigophora and Schizoporella ; but the taking vel- 
garis into the same genus with Hyndmanni will throw them all 
into the old genus Escharina (cf. Lamarck, Hist. ed. 2, p. 231, 
and Gray, List Brit. Radiata Brit. Mus. 1848, p. 123). 
47, Escharina Alderi, Busk (=Schizoporella Alderi, Hincks). 
Sverholt (Nordgaard). 
Genus ScuizoporEenua, Hincks, 1877. 
Type, Schizoporella unicornis, Johnston. 
Schizoporella embraces an extraordinary assemblage of 
species, as Levinsen has said the same form of oral opening 
occurs “ within a number of different families, and it is im- 
possible to put up sharply separated types of orifice. So, for 
instance, the forms of orifice regarded as characteristic for the 
genera Leprala and Schizoporella are connected by a number 
of transitional forms not only with each other, but also with 
the orbicular and suborbicular orifice.” The only species I 
have to record here will doubtless he removed by Levinsen 
from association with Schizoporella unicornis. 
48. ‘ Schizoporella”’ sinuosa (Busk). 
Sverholt (Nordgaard). 
The following British Schizoporelle have already been 
removed into other genera :— 
hyalina into Hippothoa. 
Alderi and spinifera by Levinsen into Mastigophora; 
and as I have now heard from him that he would also 
remove vulgaris with the above, the genus will become, 
as I have already pointed out, Escharina. 
venusta into Trypostega, Levinsen, MS. 
