573 



This shell lias very large scales grooved with very fine 

 -striae. Lateral area 11 radial ribs, m»dian areas covered 

 ivith flattened, wavy ribs which are so extremely bridged as 

 to approximate to the sculpture of a Callistochiton. 



I have never seen this shell in Australia and am con- 

 fident the locality given is incorrect. 



Stenochiton (Chiton) loiigicymha, Blainville. Type (Diet. 

 Sc. Nat., xxxvi., 1825); StenocMton^uloides, Ad. and Ang. ; 

 Schizochiton nym'p'ha^ Rochebr., non Chitoiv longicymha, BL, 

 of Quoy et Gaimard. 



The full particulars of the steps that led to the identi- 

 fication of Rochebrune's type of Schizochiton wympha with 

 Blainville's lost type of C. longicymha are fully given in a 

 paper by the writer which is being published by the Malaco- 

 logical Society, London. 



Ischnochiton' (Chiton) lineolatus, Blainville. Type (Diet. 

 Sc. Nat., vol. xxxvi., p. 541, 1825). See "Review of Chiton 

 'Crispus, Reeve, by Ashby (Trans. Roy. Soc. S. Austr., vol. 

 xliv., 1920, pp. 272-275); non lineolatus, Blain., of Iredale 

 and May; liaddoni, of Pilsbry; /. crispus, Reeve, of Bednall, 

 Torr. In my paper (I.e.) I recognized Blainville's Chiton 

 lineolatus in the shell we had known as /. crispus, Reeve, 

 common to South Australia, Victoria, and Tasmania; and 

 later, I received from Major Paul Dupuis, of Brussels, co- 

 types of Blainville's lineolatus, collected by Peron et Lesueur 

 in King Island, one of the specimens being marked inside 

 "He King." This confirmed my previous conclusions. Of 

 the two specimens mounted on the card marked "Type 

 Peron et Lesueur, He King," the larger shell is smooth and 

 .shiny, has no radial ribbing, but shows near the insertion 

 plates, broken, shallow, concentric ribbing. The dorsal area 

 is almost smooth and polished, the fine decussation, although 

 present, is inconspicuous. The lateral and median areas are 

 much less coarse in sculpture than is the case with Ischno- 

 chiton iredalei, Dupuis, which is the shell that Iredale had 

 concluded was Blainville's lineolatus ; the jugum in the type 

 is not so rounded as in the latter species, but shows a fairly 

 sharp angle and also a single flame mark bordering the dorsal 

 area. Except the flame mark the type corresponds w^ith the 

 shell given me by Major Dupuis before referred to. In the 

 second and smaller specimen on the card, the radial ribbing 

 is present on the anterior and posterior valves and in the 

 lateral areas of the median valves; altogether the sculpture 

 is much stronger than is the case with the larger specimen. 

 While this sculpture approaches I. iredalei, Dupuis, the 

 marked jugal ridge separates it from that species, and the 



