286 



to examine. I have compared it with a number of juvenile 

 meridionalis from South Australia, and find that these latter, 

 even when only one-sixth the siz© of the type of mayi, exhibit 

 the network sculpture, and it is only in extremely juvenile 

 specimens in which this feature is absent. 



It seems that C. mayi is a race in which the very juvenile 

 character^ persists into the adult or semi-adult stage. With a 

 pocket lens and undissected, there is no sign of the network 

 sculpture, but a closer examination reveals its existence in a 

 very modified form which is magnified under the enlarging 

 camera. 



Craspedochiton laqueatus, Sower-by. — Add this genus and 

 species to West-ern Australian fauna as dredged by Dr. 

 Mjoberg in the Swedish Expedition. 



Plaxi'phora alhida, Blainville. — Add to fauna of Western 

 Australia as specimens sent me from Garden Island by Mr. W. 

 B. Alexander show small patches of vermiform sculpture so 

 characteristic of this species. I have called attention else- 

 where to the fact that this species and costata, Blainville, 

 appear to merge into one another; it is, therefore, doubtful 

 whether they are specifically distinct, although the extremes 

 differ so widely. 



P. cons'persa, Ad. and Angas. — This becomes a sub-species 

 of alhida, with Port Lincoln, South Australia, as its type 

 locality. The generic names Poneroplax and Fremhleya must 

 be removed from our list. 



Kopionella, Ashby. — Insert this genus under Mopaliidae 

 in the List with Plaxiphora, now Kofionella matthewst, 

 Iredale, as its type. Only recorded from South Australia; 

 see my paper floe, cit., July, 1919, p. 71). 



K. tasmanica, Ashby. — See my paper (loc. cit., July, 

 1920). Add to List, restricted to fauna of Tasmania. 



Acanihochiton crocodilus, Torr and Ashby. — Add this to 

 fauna of New South Wales. Mr. A. F. Basset Hull has a 

 specimen collected by the late Mr. Brazier which is undoubt- 

 edly this species. 



A. maughani, Torr and Ashby. — This becomes a synonym 

 of A. 'pilshryi, Sykes ; see my paper (loc. cit., Oct., 1919, 

 p. 394). 



A. pilsbryi, Sykes. — Add to South Australian fauna with 

 A. maughaneanus, Ashby, as its sub-species from New South 

 Wales (loc. cit.). 



A. brevispinosa, Sow. — Withdraw this; it was included 

 on the strength of Mr. Hedley's Index of Mollusca of West-em 

 Australia (Jour. Roy. Soc. W. Austr., vol. i., 1914-1915); 

 probably a synonym or variety of A canthopleura spinosa,. 

 Bruge. 



