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. 



