42 ASP A , A RGOBUCH 1 I N I M . 



R. AFFINIS, Brod. PI. 22, figs. 38-41 ; pi. 23, fig. 55. 



Light yellowish or fleshy white, frequently rose-tinted towards 

 the apex ; surface stained and spotted with brownish red ; tuber- 

 cles of the angle largest, sometimes bipartite. 

 Length, 1/5 to 2 inches. 



Philippines, New Galedo /</<>, ///.*. A/uuia, 



Xomoa Isles; also West Indies. 



E. livida, Reeve (fig 39), is a less angulated form with the 

 tubercles more nearly equal in size throughout. I cannot detect 

 any difference in the West Indian shells, of which R. ponderosa, 

 Reeve (fig. 55), may represent the typical affi,ni$, whilst E. 

 Cubaniana, d'Orb. (fig. 40), is equivalent to E. livida. So many 

 intermediate stages of development of angle and tubercles occur 

 that no separation of the species is possible ; moreover, the 

 identity of the whole with E, granifera, Lam., is probable. 



Subgenus Aspa, H. & A. Adams. 



R. MARGIN AT A, Gmeliii. PI. 23, fig. 52. 



Porcellanous, polished ; white with a light yellowish tinge. 



Length, 20 to 35 mill. 



E. Coast of Africa ; fossil in Piedmont. 



Subgenus Argobuccinum, Klein. 

 R. GIGANTEA, Lam. PI. 24, fig. 69. 



Very light yellowish brown, more or less stained with darker 

 brown. Length 5 to 7'5 inches. 



Mediterranean ; Miocene and Pliocene of X Europe. 



R. LEUCOSTOMA, Lam. PI. 23, figs, 53, 54. 



Chestnut-brown, variegated with white upon the varices, under 

 a short velvety brown or green epidermis ; aperture white within. 



Length, 2*5 to 3*5 inches. 



Australia, Tasmania, Nvtr Zealand. 



This is one of the species which (like gigantea, lampas, etc.) 

 appears to partake almost equally of the characters of a Triton. 

 The operculum like the Triton, has a terminal initial growth. 



R. BITUBERCULARIS, Lam. PL 23, fig. 44. 

 Yellowish brown, white within the aperture. 



Length, 20 to 28 mill. 



Indian Ocean, Philippines, Australia. 



