ARGOBUCCINUM. 43 



The tubercles are numerous on the earlier whorls, but (in some 

 instances) coallesce into two large ones between the varices on 

 the last whorl of the adult. When the more numerous tubercles 

 are persistent, the resemblance to the next species is striking, 

 there being little to distinguish them except coloration. 



R. TUBERCULATA, Brod. PL 23, figs. 45-41. 



Chestnut-brown, with infra-sutural and submedian lighter 

 bands ; the numerous small tubercles regularly disposed and 

 dark chocolate color. Length, 20 to 40 mill. 



Red Sea, Indian , China, Malacca, Manilla, Tahiti. 



Very doubtfully distinct from both the preceding and succeed- 

 ing species. E. fuxco-costata, Dunker (fig. 45), is a half-grown 

 shell of this species in which some of the tubercles have become 

 confluent into longitudinal ribs. 



R. PULCHRA, Gray. PI. 23, fig. 51. 



Light yellowish or nearly white, mottled or obscurely banded 

 with light brown ; aperture white. Length, 1*6 to 2'25 inches. 



Philippines, Japan. 



H. and A. Adams include this species in Eupleura, a section of 

 the Ranellge which, on account of the dentition and general 

 resemblance of the shells to Urosalpinx, etc., has been placed in 

 the Muricinre : it shows no close relationship to the species of 

 Eupleura, however. 



R. GYRINA, Linn. PL 23, fig. 48. 



Shell white, with two dark chestnut bands on the body-whorl 

 and one on those of the spire. Tubercles larger than in E. 

 tuberculala, disposed to become confluent into ribs longitudinally. 



Length, *t5 to 1-5 inches. 



Torres' Straits, Australia ; Viti Isles. 



R. CUSPID ATA, Reeve. PL 23, fig. 49. 



Light orange-color ; ponderous ; the last whorl bituberculate 

 between the varices. Length, 1/5 inches. 



Philippines. 



Somewhat like E. bitubercularis but more pyramidal, and 

 wants the long canal of that species ; it is also heavier in its 

 growth. 



