Germs Cyprcsa. 225 



in a rather confused manner, brown, extremities lineated, 

 teeth finer than in spurca^ base white, somewhat spotted. 

 Habitat, St. Vincent, Cape de Verde Islands. It much 

 resembles a small form of C. turdus (Lam.), ovata (Perry). 



Allied to C. Thoinasi (Crosse), Jotir. de Conch., 1865, 

 pi. vi., f 3, of which I have only seen description and figure, 

 the habitat being unknown. I hesitate before pronouncing 

 them identical ; the columellar teeth are described as being 

 semi-obliterated, size 7 inch. 



If it were not for the constancy of the lilac base in 

 C. Listeri (Gray) and the chestnut-brown hue of C. Helvola, 

 how like they are to some forms of species we have just been 

 commenting upon ! But Listeri is not a variable shell, and 

 the peculiarity just mentioned always seems to distinguish 

 it. Through it we come to C. albitginosa (IMawe) and 

 poraria (L.), also with annulated ocelli on the back, and 

 purplish base. 



C. Helvola (L.) is one of the most easily distinguishable, 

 and yet most variable of the genus. The only species with 

 which- it could possibly be confounded Is C. citrina (Gray), 

 which has more teeth, and yet not so prominently developed, 

 dorsal surface olive brown, with rounded spots of paler 

 colour, a rare form, found In Ceylon, Mauritius, and off 

 X.W. coast of Australia (^fide J. F. Bailey sec. Roberts). 

 Sowb., Thes. Conch., pi. xxv., f 218, 219. The type o{ Hel- 

 vola is figured in Reeve, pi. xv., f 72 ; Sowerby, pi. xxv., 

 f 214 — 216. A most abundant Eastern species. Found in 

 every group of Polynesian islands worked by Mr. A. Garrett ; 

 also in India, Ceylon, Mauritius, &c. 



{a) Mascare?ia (var. nov.). Smaller, and of richer uniform 

 burnt sienna brown colour, almost or entirely obliterating 

 the white, grey, and brown spotted dorsal ornamentation. 

 Native of the Mauritius. This is a colour variety, and I 

 have traced every gradation to the type. C. chalcedouia 

 (Perry), pi. xix., f 6, is apparently intermediate between this 

 and the type. 



