28 THE POLYPLACOPHORA OF TASMANIA, 



This shell, so common in South Australian waters, has 

 been represented by only one specimen, discovered by 

 W. L. May, near l>evonport. £t is very similar to L. 

 mquinaius, but the lateral, pleural, and dorsal areas 

 can only be separated by the direction of the granu- 

 lations. The foot of this chiton is always of a sanguinary 

 hue. Length, about 6 m.m., breadth 2 m.m, 



3. LEPIDOPLEURUS COLUMNAKIUfe (Hedley 



and May.) 



L. columnartus. Hedley and May. Records Aus. Mus., 

 Vol. VII., No. 2, 1908, p; 123. 



One perfect specimen and several valves were dredged 

 from 100 fathoms, seven miles east of Cape Pillar. It 

 differs from Z. inquinatus, in that " Z. columnarius lacks 

 colour, has a more prominent mucro, longer and more arched 

 valves, the granules are sharper, and their radial arrangement 

 more distinct." 



4. CALLOCHITON PLATESSA (Gould.) 



Chiton plaiessa, Gould: Proc. Boston Soc. Nat. Hist., Vol. 

 II. (1846), p. 143; Pilsbrv, Mau. Conch., Ser. I., Vol. XIV., 

 p. 49. 



Eleven specimens of this interesting chiton were col- 

 lected at Bumie, Devonport, Stanley and Ulverstone, on 

 the North Coast of Tasmania, by W. G. Torr. The deli- 

 cate shagreening of the whole of its area and the slight 

 ridge between the pleural and lateral areas make this 

 specimen easily separated from others. Some of the speci- 

 mens are uniformly chocolate brown, others are variegat- 

 ed with pale yellow. irret,'ularly blotched. The girdle is 

 not so broad as C. inornatus, and has delicate flat 

 elongated scales, while C. inornatus is more leathery. 

 Length, 22 m.m., breadth 13 m.m. This species, though 

 common in New South Wales, is rare in South Australian 

 waters. 



5. CALLOCHITON MAYI (Torr). 



C. mayi, Torr: P. R. S., TasiP. 1912. PI. I., fig. 5, 

 6, and 7. 



This remarkable and very distinct species is, so far, 

 only known from the unique type, which will be pre- 



