[Proc. Eoy. Soc. Victoria, 33 (N.S.), 1921.] 



Art. XL — Description of Bracebridge Wilson Collection of 

 Victorian Chitons, with Description of two new Species. 



By EDWIN ASHBY, F.L.S., M.B.O.U. 



(Communicated by J. A. Kershaw.) 



(With Plate VIII.) 



[Read nth November, 1920.] . 



Mr. J. A. Kershaw, Curator of the National Museum, Mel- 

 bourne, has placed the collection of Chitons, made by the late 

 Mr. J. Bracebridge Wilson in connection with the Port Phillip 

 Exploration Committee of the Royal Society of Victoria, in my 

 hands for examination and re-identification. 



This collection was dealt with in a very able manner by Mr. 

 E. R. Sykes, B.A., F.Z.S., etc., in his paper entitled " Report 

 on a Collection of Polyplacophora from Port Phillip, Victoria, 

 (Proc. Mai. Soc, vol. ii., pt. 2, July, 1896.) 



Since that time a great deal of excellent work has been done 

 in Australian Chitons by quite a long list of earnest workers. 

 In view of this more recent work, some of Mr. Sykes' identi- 

 fications have to be altered. Probably in some cases he had not at 

 that time had any opportunity of seeing actual specimens, and 

 depended solely on descriptions for his identifications, an ex- 

 ample of such a case being his identification of Ischnochiton 

 . tat e anus, Bednall. 



The specimens are preserved in spirit, but many are badly 

 stained, and the valves and girdle scales disarticulated or broken 

 away. The collection, considering the comparatively small 

 number of specimens, is a most remarkable one, containing 

 an extraordinary percentage of rarities. 



Of the twenty-two species identified by Mr. Sykes, he described 

 five as new, all of which are still amongst our rare, and some 

 amongst our rarest, Chitons ; but in addition to these five, were 

 :four other new species mis-identified by Sykes, and although all 



