MELYILL AND STANDEN: CAPUT-SERPENTIS GROUP OF CYI'R.EA. 235 



"Survey" 1 ) having unusually clear cut white spaces surrounded 

 dorsally by a well-marked network. The variety, so often referred to 

 both by Mrs Kenyon and ourselves, as having been mistaken for the 

 true C. caput-anguis Phil., seems now, as we have just said, to be a 

 large form of Philippi's shell, and we think it is well to draw up the 

 following brief description : which may serve to amplify and supple- 

 ment the original one : — 



(a) Var. caput-anguis Phil. 



Testa id in C. capiie-serpentis tjpi'ca, sed oblongiore ; lateribus vix in- 

 crassatis vel angulaiis ; dorsaliter magis convexa ; apertura latiore 

 quam in typo; dentibus magnis, obtusiusctilis, sedecim in labro utroque ; 

 basi cinereo-alba, vel pallide bruntieo-ochracea. 



Hab. : Sandwich Isles (A. Garrett). Australia (Brazier, Mrs. 

 Kenyon). 



This is the form which is alluded to in the "Survey " 2 as being 

 distinguished by a more rounded base, and slightly greater convexity 

 of form from the typical series, and Mrs. Kenyon has expatiated at 

 some length on this subject, besides figuring the shell in three posi- 

 tions. 3 We may add, that the surface never seems so highly polished 

 in this variety as in the types. 



(b) Var. caput-colubri Kenyon, Proc. Mai. Soc, vol. 3, p. 79, fig. 3. 

 We quote the description in full : 



"Shell warm fawn or light cream colour, the spots on the dorsal surface 

 having the appearance of snow-white spots of irregular size ; extremi- 

 ties tipped with white; the base white; the rich fawn colour of the 

 margins extending about half-way across the convex base; teeth 

 conspicuous white; interior white, in contradistinction to the violet 

 hue of the interior of C. caput-serpentis. 

 Long. 27, lat. 20 mm. 



Hab. —Hawaiian Islands and Lord Howe Island." 

 In the Saul collection, now at Cambridge, are the following modi- 

 fications of this variety : — 



(1). Large yellow, fulvous, otherwise typical. 

 (2). Smoky grey, very shining. 

 (3). Pale brown, almost subtransparent. 



A fourth variety, acquired by one of us from Mr. G. B. Sowerby, 

 without locality, is pure white, the dorsal spots just appearing, though 

 much obscured, and might easily be mistaken for the var. icterina of 

 C. moneta L., next to which this species was placed in the " Survey." 4 



1 Manchester Memoirs, ser. 4, vol. 1, pi. 1, fig. 2, 188S. 



2 Op. cii., p. 214. 



3 .. Proc. Mai. Soc, vol. 3, p. 78. 



Manchester Memoirs, ser. 4, vol. 1, p. 207, 240, 1888 



