Col. C. S\Ainlioe on neio Geometers. 147 



applied to another species, Busk's name must displace it. 

 JMr. Waters has obtained LepraUa imhellis from the New- 

 Zealand Tertiaries *. 



As to the supposed identity of L. lancifera and L. imhellis^ 

 I hesitate to give a decided opinion ; but on a careful compa- 

 rison of Busk's description and figure of the latter with a tine 

 specimen of lancifera from South Africa, for which I am in- 

 debted to Miss Jelly's kindness, I have noted the following 

 diiferences 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 — " suh- 

 umbonate in front." Probably the most striking feature of 

 the latter is the large umbonate rising of the front wall below 

 the orifice, on whicli the long lanceolate aviculavium is borne, 

 lieferring to Mr. Busk's figure, we find no adequate represen- 

 tation of this structure. In L. lancifera the zooecia are 

 bounded by strongly marked raised lines, which are not 

 present in L. imhellis. The ooecium of the last-named, as 

 shown in Busk's figure {'Crag Polyzoa,' plate iv. fig. 6), 

 difiers widely from that of lancifera. The entire absence of 

 all traces of avicularia on the fossil form, except on the sub- 

 oral umbo, wiiilst they are present in profusion on the recent 

 species, especially in the neighbourhood of the ooecium, is 

 another diflerence of some significance. On the whole, 

 without venturing to dogmatize, I am inclined to regard the 

 two forms as probably specifically distinct !• 



XXVII. — New Geometers. 

 By Col. C. SwiNHOE, M.A., F.L.S., &c. 



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 jmblication of this book will be delayed, 

 from unavoidable causes, for some months, the following new 

 species are now published to ensure the tvpes to the Public 

 Museums of London and Oxford. 



* " On Tertiary Cheilostomatous Polyzoa from New Zualuud," Quart. 

 Jourii. Ueol. yoc.'for February lb87, p. 40. 



t Further iiiveatigatiou of the fossil lorin is luucL uoudcd. 



