May, J Mathews and Iredale, " Perry's Arcana." 9 



us has already pointed out (Nov. Zool., vol. xvii., p. 499, 1910) 

 that this name must be used. 



Plate XXIX. is of Paradisea regia, and is Linne's species. 



Plate XXXVI. figures Psittactis papuensis, from Papua. 



In the text is written, " resemblance to that of the Ara 

 militaris or Military Macaw, described in the fifth number of 

 the ' Arcana.' ' Ara militaris is Plate XX., showing that up 

 to this point the four plates per month had apparently been 

 duly issued. ;,,• \L/ ' "*"*• ■ 



? Plate L. represents the Red Phalarope, which Perry names 

 Tringa rubra, variety. 



Plate LVI. is of Pelicanus africanus, which must enter into 

 the synonymy of Pelecanus rujescens. 



Plate LIX. is of the Black Swan, which Perry called Anas 

 cygnus-niger . 



Plate LXX., figuring Lanius aurantius, from Buenos Ayres, 

 is a species of Thamnophilus, but seems indeterminable. 



Plate LXXVIIL, of the Crowned Crane of Africa, is called 

 Ardea coronaia, which passes into the synonymy of A. pavonina, 

 Linne. 



Plate LXXXII. is a figure of a Cassowary, which they called 

 Cassowara eximia, and guessed as habitat South America. It 

 is apparently a New Guinea form, and this name has not pre- 

 viously been noticed in literature. 



Mollusca. 



Plate II. is very important to concholo gists. On it are 

 figured four shells, of which No. 1 is called Volutella diver gens, 

 No. 2 Septa scarlatina, No. 3 Rostellaria rubicauda, and No. 4 

 Trochus apiaria. The text states : — " In describing the four 

 shells contained in the annexed plate, we shall endeavour pre- 

 viously to explain the different characters of each genus, that 

 the reader may afterwards more clearly recognize each peculiar 

 distinction appropriate thereto." 



This is the first introduction of the generic name Volutella, 

 which, however, falls as a synonym of Vasum, Bolten (Museum 

 Boltenianum, p. 56, 1798) ; this species is perhaps V. muricatum, 

 Born. 



This introduction of the genus Septa, however, once more 

 disorganizes the nomenclature of the Tritons. Perry diagnoses 

 it thus : — " Shell univalve, spiral, having membranaceous septa 

 or divisions, placed upon the body and spire opposite and 

 alternate ; these are of a different colour to the rest of the 

 shell, and slightly tuberculated." The only species at that 

 time noted and figured is Septa scarlatina ; consequently this 

 species becomes automatically the type of Septa. This shell 

 s easily identified as Murex rubecula, Linne (Syst. Nat., 10th 



