yO PHYLOGENY OF FUSUS AND ITS ALLIES. 



wrinkles, which are aciculate where crossed by the spirals. The inter- 

 calated spirals become compound in the adult. 



This specimen represents a gerontic individual of this species, con- 

 taining an additional whorl above what is usually found in the species. 



In the typical F. marmoratus the old age characteristics consist in 

 a loss of the angulation, a wrinkling of the shell, a loosening of the 

 inner lip and the consequent formation of a pseudo-umbilicus. 



Fusiis australis and F. marmoratus are closely related, but I do 

 not agree with Tryon who unites them. The specimens from the Red 

 Sea partake of the character of both, while the Brazilian species is 

 closely related to that from the Red Sea. 



The young of F. marmoratus are on the whole more rounded, and 

 perhaps more bulging at the center, with a slightly deeper impressed 

 suture and less flattening of the shoulder. The coloration of F. 

 australis is more uniform, and not so marked as that of F. marmoratus. 

 The canal is also generally longer in F. australis. 



Localities: Australia (M. C. Z. 897) ; Gulf of Suez (M. C. Z. 942) ; 

 no loc. (M. C. Z. 943) ; Red Sea (M. C. Z. 898). Var., Red Sea 

 (M. C. Z. 899?, 944) ; East Indies (B. S. 228). 



In the Haines collection of the American Museum of Natural His- 

 tory are a number of specimens which appear to belong to this variety. 

 They are labelled as coming from Australia. 



The protoconch is of the normal form, obliquely elevated, with fine 

 riblets on the last two-third volution, and ending in a varix. The 

 whorls of the conch succeeding are round, with regular rounded ribs. 

 Of these there are four or five in the best specimens seen, or fewer in 

 others. They are bicarinate at the periphery, two spirals being 

 stronger. This bicarination persists in some specimens, while in others 

 from the strengthening of one of the spirals a simple angulation is 

 produced. The ribs become obsolete in the last whorl, but the spines 

 are prominent on the angle. Intercalation has become highly com- 

 pound in the last whorl, and the lines of growth are also prominent. 



The spirals of the body whorl along the line of the suture of the 

 succeeding whorl become strong so as to produce a second angulation, 

 which, though not very prominent, is nevertheless a recognizable fea- 

 ture of these specimens. An accentuation of this feature, together with 

 an accentuation of the spines and a corresponding backward pushing 

 of all stages (acceleration), produces F. poligonoides. 



FUSUS MACULIFERUS Tapparone Canefri. 



1830. Fusus colus Deshayes, Encyclop. Meth., pi. 424, fig. 4. 



1875. Fusus maculiferus Tapparone Canefri, Muricidi del. Mar. Rosso, p. 626, 



This specific name was proposed by Tapparone Canefri for the 

 variety of F. ttiberculatus figured in the Encyclopedic Methodique, as 



