210 EDGAR A. SMITH. 



l)arl)nra) is aiiytliiiig- more than a variety of P. rustic a," 

 = patriarch a. 



Ill bar bar a the radiating ridges are generally more 

 prominent and produce a more sti'ongly dentate margin. 

 The reddish colour of patriarcha will assist in sepai-ating 

 the two forms. As a rule there is very little colour in speci- 

 mens of barbara,, and as described by Pilsbry ('Manual 

 Conch./ vol. xiii, p. 96), they are "white, tinged with brown, 

 the spines usually tipped with brown." The border, howevej*, 

 cannot be said to be " colourless." Although not striking, it 

 is of a pale greyish tint. I ha/e never seen specimens of 

 barbara attaining anything lik? the dimensions of ])atri- 

 archa. 



Order Polyplacophora. 



C alloc hit on dentotus {Spenyler). 



Chiton deutatus Spengler, ' Skrivt." Naturhist.-Selsk.,' 

 vol. iv, p. 88, PI. VI, fig. 16 (1797). 



Hab. — Cape of Good Hope (Spongier). 



Considered by Morch ('Mai. ]51at.,' vol. xvii, p. 112) the 

 same as Chiton fulgetrum Rt^ere ('Conch. Icon.,' vol. iv, 

 fig. 71). 



Cnllochiton planatus [SpenyJto-]. 



Chiton planatus Spengler, oj). cit. p. 01. 



Hab. — Cape of Good Hope (Spongier). 



Pilsbry ('Man. Conch.,' vol. xv, p. 68) suggests that this 

 species "is prol)ably the same as C. deutatus, and both 

 seem to agree with C. fulgetrum Reeve." 



Cluetopleura papilio {tSpoujIer). 

 Chiton papilio SjJengler, ' Skrivt. Naturhist. Selsk.,' vol. 

 iv, pp. 8Q, 103, No. 15, PI. VI, fig. 15 (1797). 

 Hab. — Cape of Good Hope (Spongier). 

 This species appears in Kranss ('Sudafr. ^Nloll.,' p. 41), and 



