CH^ETOPLEURA. 69 



marked with concentric striae ; terminal valves not large, obscurely 

 ribbed with broad rounded ribs ; margin membranaceous, covered 

 with scattered short silvery hairs. 



" The distinction of this species is its very uniform ornamentation. 

 In most of the Chitons there is some marked difference between the 

 lateral and central areas of the valves, but here all seems uniform in 

 the color as well as in the ornament. The lateral areas have con- 

 centric lines like those of growth. The minute dots with which the 

 surface is pitted is a feature which this species shares with many 

 others in Australia, but the marks are finer and more shallow than 

 usual. The species is very rare." ( Tenison- Woods.') 



Length 40, breadth 25, alt. 5 mill. 



Northern Tasmania. 



Chiton inornatus T.-W., Trans, and Proc. of the Roy. Soc. of 

 Victoria, xvii, p. 82, pi., figs. 8, 9 (May 10, 1881). Callochiton 

 (Stereochiton) lobatus CPR. 



The representation of the sutural laminae upon the posterior, 

 instead of the anterior border of the single valve illustrated in Mr. 

 Tenison- Wood's drawing, is of course on error ; but it is difficult to 

 to see how such a mistake could occur. 



I believe that this species is the same as Callochiton (Stereochiton) 

 lobatus Cpr. (Manual xiv, p. 53) ; and it is upon this ground that I 

 place the form in this genus and section. Teuison-Woods' descrip- 

 tion and figure give no clue to its generic position. C. lobatus Cpr. 

 becomes a synonym. 



CHITON FESTIVUS Blainville. Shell quite elongated, carinated ; 

 valves narrow, angular like a roof, very finely granulated through- 

 out; lateral areas little indicated; anterior plates of insertion 

 (suture laminae) narrow, the end plate quadridentate. Color varied 

 with brown, red and flesh color outside; white with a dash of 

 rose within. (Blainv. Diet. Sc. Nat. xxxvi, p. 541.) 



Seas of Australia. 



This is a Callochiton of the Section Trachyradsia, and may be 

 either C. fulgetrum, Rv., C. castaneus Wood or inornatus T.- Woods ; 

 The coloration described resembles the first of these. The locality 

 assigned is not to be trusted. 



Genus CH^TOPLEURA Shuttleworth. 



Vide vol. xiv, p. 27. Add to synonyms : Ehyssoplax THIELE, 

 Das Gebiss der Schnecken, ii, p. 368, 1893. (R. janeirensis Gray 



