ARTEMIS.— Plate VII. 



menli parviusculd, simjilici, lunula, perampld, mperfi- 

 ciarid, fere obsoletd; albidd, ferrugineo tbictd, lunula 

 carulescente-albd, nitente. 



The triangular Artemis. Shell triangularly ovate, 

 rather thick, concentrically somewhat irregularly 

 roughly striated, area of the ligament rather small, 

 simple, lunule very large, superficial, almost obsolete ; 

 whitish, stained with rust-brown, lunule bluish-white, 

 shining. 



Hab. Red Sea. 



Somewhat GnatkodonAWc m form, and remarkable for 

 the widely-spread supei-ficial character of the lunule. 



Species 43. (Mus. Cuming.) 



Artemis excisa. Art. testd subtrigono-orbiadari, cras- 

 duscidd, concentrice rugoso-striatd, area Ugamenti pro- 

 funde excavatd, lunuld ampld, obsoletd ; albidd. 

 The excavated Artemis. Shell triangularly orbicular, 

 rather thick, concentrically roughly striated, area of 

 the ligament deeply excavated, lunide large, obsolete ; 

 whitish. 

 Philipi'I, Abbdd. und Besch. Conch. Cgl/i. p. 4. pi. 2. f. 4. 



Fenm excisus, Chemnitz. 

 Hab. Nicobar Island ; Behn. 



The lunule is more superficial and obsolete in this 

 species than in the preceding. Its chief peculiarity con- 

 sists in the deeply excavated ligament-area. 



