104 Canon A. M. Norman — Notes on the 



spines are replaced by short flattened plates ; the ooeclum is 

 much larger than in the type, semiglobose, sparingly punc- 

 tate, with a longitudinal keel ; in fertile zooecia the flattened 

 plates just referred to do not nearly meet in the centre o£ 

 the ooecium, but form two outspread wings overhanging the 

 oral opening. 



I am not sure that this should not be regarded as a species 

 rather than a variety ; Mr. Waters gives the localit}^ of the 

 Jackson-Harmsworth specimen as off a glacier between Cape 

 Flora and Cape Gertrude, Franz-Josef Land, in about 

 30 fathoms. The specimens in ray own collection are from 

 Gray Hook, Spitsbergen, 90 fathoms {Sinitt), and off Hol- 

 steinborg, Greenland, 57 fathoms ('Valorous,^ 1875). It 

 would tlius seem not only to be a high Arctic but also a 

 deep-water form, since I also possess the ordinary typical 

 form on shore- weed irom botli Greenland and Spitsbergen. 



J. E. Gray (Cat. Brit. Anim. B. M. pi. i., Centroninse, 

 p. 148) appears to suggest a generic name, Microstoma, for 

 this species. This name can never, however, be employed, 

 since it had previously three times been used for other 

 genera. 



Genus Reptadeonella, Busk, 1884. 



In his ' Challenger ' Report, Polyzoa, pi. i. 1884, Busk 

 instituted a genus Reptadeonella, for the reception of the 

 Adeonean form Lejyralia violacea, Johnston {^=Microporella 

 violacea, Hincks). Three years later Macgillivray (Cat. 

 Marine Polyzoa of Victoria, 1887, p. 110) instituted a genus 

 Adeonellopsis with Adeonella distoma ( = ? Eschara cosci- 

 nopora, Reuss) as its type ; and this last genus J. W. 

 Gregory ('' British Palaeogene Bryozoa,'-* Trans. Zool. Soc. 

 vol. xiii. 1893) united with Reptadeonella, Busk. But 

 Adeonellopsis has a distinct frontal area containing many 

 fimbriated pores, and is a group for which Levinsen, doubt- 

 less not remembering Macgillivray^s genus, has recently 

 suggested another name, Lohopora (" Studies on Bryozoa,^' 

 Vid. Medd. fra den Nat. Foren. i Kjobenhavn, 1902, p. ,24, 

 separate copy) . 



The dorsal view of tlie zooecium of Reptadeonella violacea 

 is very pretty and of unusual interest, for there are not less 

 than twenty-eight radii of alternating colour, darker or 

 lighter, arranged all round the cell, which indicate many 

 passages of communication between the zooecia. 



Of the other British species which Hincks placed in Micro- 

 porella, Microporella Malvsii, Audouin, has been made by 

 Jullien the type of a genus Fenestridina (Miss. Scicnt. Cap 



