108 Canon A. M. Norman—Notes on the 
part of that which precedes as relates to new genera, and also 
contemplated the formation of some others relating to groups 
further on, when I received from Herr G. M. R. Levinsen 
his “ Studies on Bryozoa.”” From that short paper I learnt 
that he was engaged on the rearrangement of the Polyzoa, 
and that he had made very extensive observations, and was 
thus in an excellent position to undertake the task. To him, 
therefore, I leave it as regards the rest of the Cheilostomata. 
But as I feel that I cannot use, as though they were my own, 
many associations of generic and specific names which have 
been employed, I shall signify my doubts as to the allocation 
of the species by printing the generic name within commas ; 
at the same time I would have it to be understood that this 
only implies doubt, as in many cases I have not subjected 
the species to special critical examination. 
Genus Hirrotnoa, Lamouroux, 1821. 
= Celleporella, Gray, 1848,= Diazeuzxia, Jullien, 1888. 
Type, H. dwaricata, Lamouroux. 
The genera of Gray and Jullien were founded on the same 
type, Cellepora hyalina, Linné. 
In my paper, “ A Month on the Trondhjem Fiord” (Ann. 
& Mag. Nat. Hist. ser. 6, vol. xii. 1894, p. 130), I wrote :— 
“Since Jullien declines even to place them [1. e. Celleporella 
(Diazeuxia) and Hippothoa] in the same family, it is better to 
wait for his further views rather than at once merge Celle- 
porella in the earlier genus Hippothoa.’ Death has deprived 
us of Jullien’s further opinion, and, for the reasons stated in 
my paper referred to, I now employ the genus Hippothoa. 
Levinsen has expressed the same opinion, though he “ puts 
the cart before the horse ” when le writes “the species of 
the genus Hippothoa, I think, must be merged in Diazeuzia” 
(‘* Studies on Bryozoa,” Videns. Medd. Naturh. Foren. 1902, 
p. 23, separate copy) ; and Waters has (Journ. Linn. Soc., 
Zool. vol. xxviii. p. 70) placed C. hyalina in Hippothoa., 
46. Hippothoa hyalina (Linne). 
On shells of Buccinum, Neptunea, &c. throughout the 
district *. 
* In my Shetland Report of 1868 I recorded two Polyzoa of very 
small size and little character under the name Celleporella lepralioides and 
Celleporella pygmea, The former is the same species which Hincks 
subsequently described under the name Lagenipora socials, the latter may, 
I think, perhaps be placed in the genus Phylactella. 
