Miscella7ieous. 261 



their publications are invariably assisted in their deception. Fortu- 

 nately in the Natural- History Museum a sharp look-out is kept for 

 cases of this kind, and covers are always considered when a boolv is 

 sent to the bindei's. 



The book that I wish to call attention to is F. Moore's ' Lepi- 

 doptera Indica,' of which thirteen parts have already appeared, and 

 of which the proper dates are the following : — 



Pt. 



Not Aug. 1890, as stated in the 

 signatures ! 

 129-152, Aug. 1891. Not Aug. and Nov. 1890 and 



July 1891, as stated in the 

 signatures ! 



Not July 1891, as stated in the 

 signatures ! 



Not Aug, and Sept. 1891, as 

 stated in the signatures ! 

 10. „ 209-240, April 1892. Not Oct. 1891 and Jan. 1892, 



as stated in the signatures ! 



11. „ 241-272, Sept. 1892. Not Jan., Mar., atul Apr. 1892, 



as stated in the signatures ! 



12. „ 273-310, Dec. 1892. Not May and June 1892, as 



stated in the signatures ! 



13. „ 1-32, Jan. 1893. Not Aug. 1892, as stated in the 



signatures ! 



I do not know whether the author or the publisher is responsible 

 for this deceptive dating ; but it is to be hoped that neither Mr. Lovell 

 Reeve nor Mr. Moore will any further indulge in such objectionable 

 vagaries. 



C. Davies Sherkorn 

 Natural-History Museum, (Index gen. et spec. anim.). 



Cromwell Road, S.W. 

 Feb. 18, 1893. 



Diffuse Pigmentation of the Epidermis of the Oyster due to prolonged 

 exposure to the light : Regeneration of Shell and Loss of Adductor 

 Muscle. 



Prof. Ryder reported on behalf of Prof. R. C. Schiedt that oysters 

 which had the right valve removed and exposed to the light in this 

 condition, in a living state, for a fortnight or so, developed pigment 

 over the whole of the epidermis of the exposed right mantle and on 

 the upper exposed sides of the gills, so that the whole animal from 

 this cause assumed a dark-brown colour. Animals so exposed not 

 only attempted to reproduce the lost valve and hinge, but also partly 

 succeeded in so doing, even re-establishing the insertion of the 



Ann. & Mag. N. Hist. Ser. 6. Vol xi. 19 



