SOME VARIETAL FORMS IN THE GENUS CYPR^A. 



By J. KIDSON TAYLOR. 



(Read before the Society, Nov. loth, 1915). 



C. variolaria Lamk. [=cruenta Gmel.] van splendens nov. 



This variety differs from tlie type in having tlie dorsum much more 

 brilliant in colour (a rich citron-brown), in the margins having the 

 porcellanous deposit carried very much further over the back, this 

 deposit being of a distinct violet tinge, covered with very numerous 

 richly coloured spots of deeper violet ; base yellow, interstices 

 between the teeth bright orange. 



Habitat : Japan and Seychelles. 



C. erosa L. var. galbula nov. 



This is a remarkable variety with white margins and dentition 

 much more developed than in the type shell. 



The dorsum is covered with brilliant orange deposit, clouded with 

 suffused blotches of a darker colour and devoid of the usual white 

 spots and annulated maculations : teeth very strong and coarsely 

 developed. 



Habitat : Seychelles. 



C. erosa L. van pallens nov. 



In this variety the ground colour of the dorsum is of a very pale 

 greenish-white colour covered with minute, very numerous white 

 spots interspersed with a few annulated ones, very indistinctly defined; 

 in other respects similar to the type. 



Habitat : Ceylon. 



C. erosa L. van lucida nov. 



A fine semi-pellucid form, delicately tinted with very pale fawn, 

 slightly deeper in the centre of the dorsum, forming a faint band of 

 colour, margins strongly incrassate, with the side blotches very 

 indistinct. Dorsal white spots absent. 



Habitat : Seychelles. 



C. esontropia Duclos var. pellucida nov. 



A variety differing from the type in having the entire surface of the 

 shell semi-transparent, leaving the dorsal spots much less defined ; 

 base and lateral margins entirely white with no indication of spots as 

 in the type shell. 



Habitat : Hawaiian Isles. 



