Natural History of East Finmarh. 109 



EscHARiNA, H. Milne-Edwards, 1836. 



= IIerentia, Gray, 1848 (first species H. Hyndmn7ini), = Masti(/ophora, 

 Hindis, 1877 (t3'pe M. Hyndnianm). 



Type, E. vulgaris, Moll. 



Levinseii (" Studies of Bryozoa,^^ p. 26) removes Alderi 

 into Mastiyophora, 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 zooeciura, comes very 

 near Hyndmanni. When Hincks made his genera he ought 

 to have employed Herentia and Escharina, instead of estab- 

 lishing MastigojjJiora and Schizojjorella ; but the taking vul- 

 garis into the same genus with Hyndmanni will throw them all 

 into the old genus Escharina {cf. Lamarck, Hist. ed. 2, p. 331, 

 and Gray, List Brit. Badiata Brit. Mus. 1848, p. 123). 



47. Escharina Alderi, Busk ( = Schizoporella Alderi, Hincks) . 

 Svffirholt {JSordgaard). 



Genus Schizoporella, 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 Lepralia 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 be removed by Levinsen 

 from association with Schizoporella unicornis. 



48. " Schizoporella" sinuosa (Busk). 

 Svserholt (Nordgaard). 



The following British Schizoporella have already been 

 removed into other genera : — 



hyalina into Hipjwthoa. 



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. 



