38 



Anterior valve having 12, central valves 1, posterior valve 12 

 slits, teeth blunt, pectinated. Eaves broad. Girdle wide, 

 alternately light and dark ; scales rather large and wide often 

 showing a slight tendency to oarination in the middle, micro- 

 scopically striated. Length 30, breadth 23 mill. New- 

 Zealand." 



It maybe here mentioned that in order to satisfactorily deter- 

 mine a chiton by all its essential characters, which particularly 

 include the internal ones, such as the sutural plates, sinus 

 slits, etc., it is necessary to take the shell to pieces. 



Eeceived from Captain Beddome as Chiton liratus, Adama 

 and Augas, and under which name I am informed it is 

 labelled in the museum collection at Hobart. C. (Lepido- 

 phurus) liratus was described with other South Australian 

 Chitons, including C. ( Lepidopleurus ) sfeeiosus by Messrs 

 Adams and Angas m the P.Z.S, 1864, from "specimens 

 gathered by Mr. Angas on Torke's Peninsula, S.A. I have 

 not yet myself been successful in determining the C liratus 

 from among our South Australian Chitons, but at any rate 

 no South Australian specimen of pellisserpentis exists in any 

 local collection. Again, the Tasmanian shell is a true Chiton 

 whereas liratus of A. and A. is an Ischnochiton. In conclud- 

 ing that the Tasmanian shell is C. pellisserpentis and not 

 C. smclain, which is closely allied to it, I have relied on the 

 circumstance that in the specimens in my possession (five) 

 the broad sinus shows an "absence or absolescence of teeth " 

 and also on the colouring of the girdle, which is alternately 

 light and dark. The figure in Reeve well illustrates the 

 species. 



Chiton sindairi, Gray. Dieffenbach's Travels in New Zealand 

 Vol. 2, p. 263 (1843). 



As this shell is closely related to C. pellisserpentis, and as it 

 has been recorded from Tasmania, although that locality has 

 been doubted by the late Kev. J. E. Tenison Woods, l"have 

 extracted the full description as given in the Manual of 

 Conchology for the benefit of Tasmanian conchologists. 



" Shell oval, rather elevated, the dorsal ridge rounded side 

 slopes rather straight ; brown-bladt, each valve irregularly and 

 raggedly striped with whitish ; the head valve pale with dark 

 rays. Sometimes the white predominates. The lateral areas 

 are raised and sculptured with three or four radiating granose 

 ribs, often sub-obsolete. Central areas smooth in the middle 

 except for a few growth wrinkles, but having fine short longi- 

 tudinal riblets at the sides in front of the diagonal line. These 

 nblets are sometimes almost obsolete. Head valve sculptured 

 at first with about 15-18 granose riblets, but as they have a 

 tendency to split as the valve grows, the number in a growa 



