310 



Mr. M. A. C. llintoii on the 



In tlie followinf; tal)le the LumWo specimens aro arranjrod 

 in what, jivlj^iiip^ by the t<'eth, appears to be the order of 

 iiidiviiliial afje, coniinpnciiiu; witli the youngest. SpeciiiK'ns 

 marked "G" or "B" are in ;^rey or biii^ht coats respec- 

 tively ; the unmarked items are in intermediate stages of 

 coh)ration : — 



From thi.s table it appears that th« gradual changu ol 

 C(doin' (ifscribtd i.s not connuctid merely with dill\rcnces of 

 individual age. It .seoms also improbable that the change 

 is a purtly seasonal one. One may suspect, perhaps, that in 

 this sptcies each indi\ ideal is subject to a constantly recurring 

 cycle of colour-change, the incidence of which cycle depends 

 lather upon the |)liysi(d<)i;ical condition of the individual than 

 upon any general or extrinsic factor. 



7'. y. 7nossin)ilici/}i is ceitaiidy very closely related to, if it 

 lie not identical with, iwxejlavivitfis. Thomas mentions that 

 ihc nasals of his ly| e are considerably broader behind than 

 m the skull of fluvivittis figured by Peters ; this difference, 

 alihoiigh \ i.sible in some of the newly-arrived specimens from 

 Linnl o, does not appear to be constant. In the bright jdiaso 

 of cohuation inosf-anibinis now seems to differ from Jiavivitlis 

 merely by having the posterior half of each lateral dorsal 

 stripe white instead of yellow ; but, having regard to the 

 difference in locality, this fact will perhaps justify us in 

 retaining i/iossatn/iiciis as a distinct subspecies ponding the 

 arrival of specimens from Mossimboa. 



