Notices of Memoirs — Sherborn's Index AnimaUum. 559 



of slips, the toughness necessary for constant handling, a surface 

 equally convenient for pencil and carbon paper, and a cheapness of 

 Is. 2d. per 1000 slips. The size of slip employed is 127 x 63 mm. 

 (5 x 2\ inches). 



Nomina nuda are distinguished by the letters [n. n.]. 

 Nomina nuda accompanied by figures by the letters \n. el /.]. 

 In those cases where an author lias described and figured a species 

 some time after printing his nomen nudum, a reference is also given 

 to the nomen nudum, when possible. 



Particular attention has been paid to the date of publication of 

 books, periodicals, and serials. This is a part of the work which 

 demands considerable time and patience, but the results obtained 

 fully justify the labour. The more important results as to dates 

 already arrived at and published are : — 



Pallas, P. S., Icones Insect. (See Annals Mag., ser. 6, vii, p. 236, 

 1891.) 



Pallas, P. S., Nov. spec. Glir. (See Annals Mag., ser. 6, vii, p. 236, 

 1891.) 



Schreber, J. C. D., Saugthiere. (See Proc. Zool. Soc. 1891, p. 587.) 

 Sowerby, Genera Recent Shells. (See Annals Mag., ser. (5, xiii, 

 p. 370, 1894.) 



Encyclopedie Methodique. (See Proc. Zool. Soc. 1893, p. 582.) 

 Jardine and Selhy, Illustr. Ornith. (See Ibis, 1894, p. 326.) 

 Moore, F., Lepidopt. Indica. (See Annals Mag., ser. 6, xi, 1893, 

 p. 260, and ser. 6, xiv, 1894, p. 464.) 



Siebold, P. F. von, Fauna Japonica. (See Proc. Zool. Soc. 1895, 

 p. 149.) 



The date of publication of a species is taken to be that date on 

 which the print in which the name appears is offered for 

 public sale or public distribution. 

 No author's copy, and no excerpt from any publication distributed 

 privately before such publication is offered for public sale or 

 public distribution, have been accepted. 

 In the case of privately printed books, entries taken from them 

 are distinguished by the words [auct. typ.~\. 



In all cases where the date is doubtful and cannot be definitely 

 ascertained, the date figures are enclosed in brackets [ ], or have 

 some other distinguishing mark — e.g. (?) — placed against them. 



In the case of plates appearing before the text, the date of each is 

 given if ascertainable (e.g. Schreber's "Saugthiere"), but in no case 

 is the date of a plate accepted in preference to the date of text, for 

 the reasons which follow : — 



The figure depicted on a plate may, or may not, be the drawing 

 intended by the author; it is the work of the artist, who is 

 also responsible for the descriptive legend. In numerous 

 instances the descriptive legend on a plate is quite erroneous, 

 and has been repudiated by the author in his text. Until the 

 text descriptive of a plate appears, the names on the plate 

 must be considered as nomina nuda, and it is open to anyone 

 to describe and rename such nomina nuda. 



