218 



Iredale and May (I.e., p. 99j say, "Moreover, we have two species collected on 

 the New Zealand littoral." So while the name L. inquinatiis, Reeve, must in 

 future be limited to the New Zealand shell, it is not quite certain whether L. 

 iredale, Ashby, is a synonym thereof or stands as the name of the second 

 species, referred to by Iredale and May — that question must be left for future 

 determination. 



Lepidopleurus liratus, Adams and Angas, 1864. 



PI. xvi., fig. 1. 



(Proc. Zoolog. Soc. (Lond.), 1864, p. 192; Angas, Lc, p. 187, 1865; L. inquinatiis, Rv. 

 of Bednall, Proc. Mai. Soc, vol. ii., pt. 4, p. 141, 1897; L. inqninatus, Rv. of Torr, Trans. 

 Roy. Soc. S. Austr., vol. xxxvi., p. 141, 1912; L. liratus. Ad. and Ang. of Ashby, Proc. 

 Roy. Soc. Vict., 33 (N.S.), 1921.) 



Introduction. — While Adams and Angas described several different chitons 

 under the generic name Lepidopleurus, they do not appear to have recognized 

 its generic characters ; the species under consideration is the only one of them 

 that properly belongs to this genus. This fact led Pilsbry to suggest that "it 

 might be an Ischnochiton." 



The following is the original description: — "Shell small, elongated, convex; 

 yellowish-brown maculated with pale brown. End valves and lateral areas con- 

 centrically, remotely sulcated, densely and minutely lirate, the lirae closely 

 pustulose. Posterior valve elevated, lateral areas slightly elevated ; median 

 valves obtusely carinated in the middle ; dorsal areas longitudinally lirate, the 

 lirae closely pustulose. Girdle pale brown, densely covered with minute scales. 

 Length, 8 mm. ; width, 4 mm. Yorke Peninsula, South Australia, under stones 

 at low water. Angas." Note by Author. — The girdle is clothed with flat, 

 elongate, imbricating scales, mostly straight-sided and considerably longer than 

 broad, which are very easily detached. From amongst these scales proceed, 

 chiefly near the shell, long, white, cylindrical spicules, which are about four 

 times the length of the scales ; these spicules are in clusters at the sutures, 

 elsewhere more or less scattered. The girdle is also furnished with a spiculose 

 fringe and the underside is closely covered with flat, elongate scales. This species 

 is a littorine form, and although never common, I have collected it at all places 

 visited in St. Vincent Gulf, and also at Port Lincoln, and have recorded it for 

 the State of Victoria. Dr. Torr has found it at Port McDonnell, in the South- 

 east of this State, to St. Francis Island in the west. As this species does not 

 appear to have been figured hitherto, one is included in the plate accompanying 

 this. 



Lepidopleurus matthewsianus, Bednall, 1906. 



PI. xvi., figs. 5, 5a. 



(Bednall, Proc. Mai. Soc, vol. vii., pt. 2, June, 1906, p. 92, pi. ix., figs. 1 1-f ; Torr, 

 Trans. Roy. Soc S. Austr., vol. xxxvi., 1912, p. 142 ; Papers and Proc. Roy. Soc. Tas., p. 28 

 =L. niger, Torr, Trans. Roy. Soc. S. Austr., vol. xxxv., 1911.) 



The writer supplied the specimens to Mr. Bednall which were used in the 

 original description ; they were from Marino, which is therefore the type locality. 

 He found it on the occasion of his first collecting trip to that locality, in 1897, 

 and he has since taken them at most of the localities visited in South Australia. 

 It was because of Mr. Bednall's request that he refrained from naming this shell. 

 Original description: — "Shell elongate, regularly arched; keel and lateral areas 

 indistinct, but clearly defined when seen through a lens ; jugal area absent ; 

 lateral slopes rounded. Colour greyish-white. Anterior valve closely, minutely, 

 regularly, radially granulated throughout. Central valves similarly ornamented, 

 the granulations running longitudinally on the dorsal area and radially on the 

 lateral areas, the granulations by their direction defining the areas. Sutural 

 plates small, triangular, and very distant, the jugal sinus consequently being 



