334 Mr, A. G. Bmtler on Lepidoptera from the name of" "Quadrula symmetrica'''') beyond those ad-duced bj me, except one which I undertake to say is erro_ neous, namely that " the plates are either chitinoid or mem branous." On the other hand, he undoubtedly furnishes the completest proof of the propriety of referring the form to the genus Diffiugia when the only remark he has to make upon the animal is that the sarcode " has the same character as that of Difflugia.''^ This ought to be borne clearly in mind^ for Prof. Leidy subsequently speaks of Quadrula symmetrica as " the only representative of its genus." But it is quite needless to argue the question of priority a step further, for I now have to place on record an important fact of which I was ignorant at the time I described Difflugia symmetrica in 1863-64, and discovered only within the present year, viz. that this identical form had been figured in Ehren-berg's ' Infusionsthierchen' as a Difflugia. Ehrenberg's subse-quent remarks in the ^ Proceedings of the Berlin Academy ^ and elsewhere, to which allusion is now made by Prof. Leidy^ are altogether beside the question at issue, except to the extent of proving that Ehrenberg recognized the validity of my specific appellation of '' symmetrica " and retained it. Of course, the moment I found I had overlooked Ehrenberg's title to priority (unfortunately too late to be made known to the illustrious dead), I determined on the first suitable occasion to cede all title to the discovery of D. symmetrica^ though I was undoubtedly the first to detect it in this country, and to discover, describe, and figure the other new forms of testa-ceous DifHugidge of which I shall have occasion to speak in the concluding part of this paper. [To be continued.] XXXI. — On a Collection of Lepidoptera made at Manipur and on the Borders of Assam hy Dr. George Watt. By Aethur G. BuTLEE, F.L.S., E.Z.S., &c. [Plate Vm.] [Concluded from page 310.} LycsenidsB. 69. Gyaniris placida. Cyaniris placida, Moore, P. Z. S. 1883, p. 523, pi. xlviii. fig. 5, Near Assam. Only males of G. placida were obtained.
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