On new Species of Lepidoptera from Japan. 437 sence of some of the remaining acerate spicules left end to end on its surface in a reticulated form, there can be no doubt that it had belonged to a digitate Chalina ; but, with the ex-ception of a few points, the whole of the fibre of the interior had disappeared, leaving the parts which it had occupied in the form of a reticulated, anastomosing, empty tubulation, while the interstices were filled with translucent homogeneous flint-like silex. Now here is a condition exactly opposite to that presented by the Farringdon (Coral-Rag) sponges, in which the fbre is retained and the interstices more or less empty, while the fibre is calcareous, and the interstices, where occupied, filled with calcareous material also. Thus I cannot help thinking that this silicified digital process of a Chalina in the Upper Greensand flint might have been calcareous if it had been in the Coral Rag, and there-fore that most, if not all, of Prof. Zittel's fossil Calcispongise may, after further examination, have to be transferred to his other orders ; while I know no one would rejoice more to see this effected than Prof. Zittel himself, if the evidence in favour of it warranted the alteration. Budleigh-Salterton, Nov. 3, 1879. LI. — Descriptions of new Species of Lepidoptera from Japan. By Arthur G-. Butler, F.L.S., F.Z.S., &c. [Continued from p. 374.] Geometridae. 68. Thalera veneta } n. sp. (no. 425). Emerald-green : wings crossed just beyond the middle by a white-edged darker line ; a very slender bronze-brown mar-ginal line ; fringe snow-white, spotted with ferruginous at the terminations of the veins : primaries with a second white line across the basal third ; the costa buff-coloured : head bright clay-red ; antenna? with golden-yellowish pectinations : thorax, excepting the tegulee, and abdomen sordid white. Wings be-low pale sericeous green ; primaries with buff-coloured costa : body below sordid white, legs pale buff. Expanse of wings 1 inch 5 lines.
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