35 



Lepidopleurus longicymba, Angas, iu his Lists of the Mollusca 

 of South Australia and of New South Wales, iu the 

 P.Z.S. of London. 

 Ischnochiton longicymba, Carpenter. MS. 



„ „ Haddon, Challenger Eeport, Polypla- 



cophora, p. 1 7. 



Also Chiton longicymba of Australian collectors, but not 

 chiton longicymba, Quoy and Gaimard. " Shell distinctly 

 keeled on the back ; scales of the girdle beautifully regular in 

 size and arrangement, and evenly and deeply grooved. Sculp- 

 ture and colour pattern like I. longicymba. Interior white, 

 greenish, or bluish ; anterior valve with 10, central 1 , posterior 

 valve 12 slits ; teeth thin, sharp. Posterior tooth of the inter- 

 mediate valves long, extending almost to the posterior lateral angle 

 ■of the valve, and not terminating abruptly. Length 27, breadth 

 12 mill. 



" The colouring is even more variable than in the New 

 Zealandic I. longicymba ; some specimens are clear, light 

 greenish buff ; some are brown, speckled all over with olive 

 black; some are mainly red or black, having a wide white 

 dorsal stripe." 



Port Jackson, N.S.W., South Australia (common), Tas- 

 mania. 



Mr. Pilsbry writes :— " Having examined extensive suites 

 of specimens of the longicymba type from New Zealand and 

 Australia, I find myself compelled to separate specifically 

 those from the latter locality, although in general appearance, 

 colour, and sculpture they certainly resemble the true longi- 

 cymba. The differences indicated (in italics) seem to be 

 remarkably constant and readily recognised if one takes the 

 trouble to look for them. It must be admitted, however, 

 that to thoroughly examine a small Chiton involves some 

 little trouble ; and therefore we must feel no surprise if the 

 superficial collector, and the often no less superficial author, 

 continue to confound species which are really distinct. It 

 must be said, however, that the confusion of these two species 

 has probably been due to the lack of specimens from the two 

 localities for comparison, else the differences would hardly 

 have escaped writers so careful and observant as Carpenter 

 and Haddon." 



I examined every specimen sent to me by Captain 

 Beddome, and found that all belonged to the Australian 

 Haddoni, and not to the New Zealand longicymba. 



The foregoing species was received from Captain Beddome 

 as Chiton speciosus, Adams and Angas. The C. speciosus was 

 described in P.Z.S., 1864, p. 1S2, from specimens obtained 

 by Mr. Angas on Torke's Peninsula, South Australia. It is 



