42 AJSPA, ARGOBUCCINUM. 



K. AFFiNis, Hiod. PI. 22. tigs. 38-41 ; pi. 23, fig. 55. 



Light yellowish or floshy white, fre([iiently rose-tinted towards 

 the apex ; surtace stained and spotted with l)rownish red ; tuber- 

 cles of the angle largest, sometimes bipartite. 



Length, 1-5 to 2 inches. 



Philippines, New Caledonia, Ins. Annaa, 



Samoa Mes ; also West Indies. 



R. lirida, Reeve (tig 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. poaderosa, 

 Reeve (fig. 55), may represent the typical ajfinis, whilst R. 

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

 intermediate stages of development of angle and tubercles occur 

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

 identity of the whole with R, firanifeiHi, Lam., is proba])le. 



Sul>geiius Aspa. H. A A. Adams. 



R. MARGiNATA, Gmclin. PI. 23, tig. 52. 



Porcellanous, polished ; Avhite with a light yellowish tinge. 



Length, 20 to 35 mill. 



H. Coast of Africa ; fossil in Piedmont. 



iSiiligciius Argobucoinum, Klein. 

 R. GiGANTEA, Lam. PI. 24, fig. (i9. 



Very light yellowish brown, more or less stained witli darker 

 brown. Length 5 to 7'5 inches. 



Mediterranean ; Miocene and Pliocene of H. Europe. 



R. LELCOSTOMA, 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, New Zealand. 



This is one of the species which (like gii/antea, lampas, etc.) 

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

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



R. BTTUBERCULARis, Lam. PI. 23, fig. 44. 

 Yellowish brown, white within the aperture. 

 Length, 20 to 28 mill. 



Indian Ocean, Philippines, Avstralia. 



