80 



C. NEPTDNI, Gmel. PL 22, figs. 9-12 ; PI. 1, fig". 3. 



Yellowish or reddish brown. Length, 6-10 inches. 



W. Africa. 



C. Tritonis, Brod. (fig. 10), is a synonym. The shell when 

 young and in good condition, is frequently mottled with lighter 

 and darker brown, and this color-variety has received the name 

 of C. Navicula, Gmel. C. patulum, Brod. (fig. 11), is another 

 synonj^m. I figure, actual size, a quite young individual, with 

 protruding spire (fig. 12) which afterwards becomes immersed in 

 the succeeding whorls. 



C. OLLA, Linn. PL 22, fig. 13. 



Pale fulvous. Columella two-plaited. Length, 3'5-5 inches. 

 Southern Spanish shores of the Mediterranean, 



N. W. A/rich, Portugal, Canaries. 



Genus MELO, Humph re}'. 



The apex of the shell is spiral, regular, very different from the 

 shapeless apex of Cymbium. The distribution of Melo is exclu- 

 sively tropical and exotic, ranging from the Indian Ocean to 

 Australia. Messrs. Adams state that the animal of this genus, like 

 Cymbium, is ovoviviparous, the young ones being arranged in 

 the oviduct of the female in a long string, without egg-shells. 



* Spire covered or enclosed, unarmed. 

 M. INDICA, Gmelin. PL 23, fig. 14. 



Lemon-yellow to orange-color, with two or three revolving- 

 zones of tessellated spots ; sometimes without spots when large. 

 Epidermis very thin, light olive, not often seen on cabinet 



specimens. Length, 6-9 inches. 



Indian Ocean. 



* * Spire exposed, not produced, surrounded by decumbent spines. 

 M. TESSELLATA, Lam. PL 23, figs. 15, 16. 



Yellowish or orange, under a light olive epidermis, with or 

 without two or three revolving zones of brown tessellations. 

 Length, 6 inches. 



Indian Ocean. 



The species of coronated Melos are very hard to separate, and 



