Col. C. Swinhoe on new Geometers, 147 
applied to another species, Busk’s name must displace it. 
Mr. Waters has obtained Lepralia imbellis from the New- 
Zealand Tertiaries *. 
As to the supposed identity of Z. lancifera and L. imbellis, 
I hesitate to give a decided opinion ; but on a careful compa- 
rison of Busk’s description and figure of the latter with a fine 
specimen of lancifera trom South Africa, for which [ am in- 
debted to Miss Jelly’s kindness, I have noted the following 
differences between them, which are by no means unimportant. 
In Busk’s diagnosis (which is meagre and insufficient) the 
cells are merely characterized as “ ovate, punctured, especially 
round the border; subumbonate in front, with an orifice 
having a straight lower border and simple peristome.” It is 
obvious that there is nothing very distinctive in this descrip- 
tion ; it would apply to a multitude of forms. One clause of 
it, however, is certainly inapplicable to L. lancifera— sub- 
umbonate in front.” Probably the most striking feature of 
the latter is the large umbonate rising of the front wall below 
the orifice, on which the long lanceolate avicularium is borne. 
Referring to Mr. Busk’s figure, we find no adequate represen- 
tation of this structure. In L. lancifera the zocecia are 
bounded by strongly marked raised lines, which are not 
present in L. imbellis. The ocecium of the last-named, as 
shown in Busk’s figure (‘Crag Polyzoa,’ plate iv. fig. 6), 
differs widely from that of lancifera. ‘The entire absence of 
all traces of avicuiaria on the fossil form, except on the sub- 
oral umbo, whilst they are present in profusion on the recent 
species, especially in the neighbourhood of the ocecium, is 
another difference of some significance. On the whole, 
without venturing to dogmatize, I am inclined to regard the 
two forms as probably specifically distinct f. 
XXVII.—New Geometers. 
By Col. C. SwinHog, M.A., F.L.S., &e. 
THE species described in this paper will appear in the second 
volume of the ‘ Catalogue of Moths in the Oxford University 
Museum’; and as the publication of this book will be delayed, 
from unavoidable causes, for some months, the following new 
species are now published to ensure the types to the Public 
Museums of London and Oxford. 
* “On Tertiary Cheilostomatous Polyzoa from New Zealand,” Quart. 
Journ. Geol. Soc. for February 1887, p. 40. 
+ Further investigation of the fossil form is much needed. 
