PIIYLOGENY OF FUSUS AND ITS ALLIES. 23 



of the whorls found in some normal individuals, and leading to F. 

 tiirctiuuis, have been observed. 



FUSUS REEVEANUS Philippi. 



1847. Fiisiis multicarinatus Reeve, Iconica, pi. 6, fig. 22. 

 1851. fusiis rccvcanus Philippi, Abbildiingen, vol. Ill, p. 119. 



No authentic specimens of this species have been seen, though 

 some specimens in the U. S. Nat. Museum may belong here. The 

 species was first figured by Reeve, as F. Diitlticarinatiis Lam. Kiener, 

 however, figured a wholly distinct shell as Lamarck's type of F. 

 innlficariiiatus. Sowerby rcfigures Reeve's shell under Lamarck's 

 name, adding that " Kiener 's shell has angular whorls, while Lamarck's 

 has ' tours tres-arrondies.' " Tryon adopts Kiener's figure as the 

 type of Lamarck's species. Philippi apparently agrees with Kiener. 

 Tryon makes the present species a variety of F. spectrmn Adams and 

 Reeve. It is, however, distinct, and Philippi's name must stand. 



This species represents the stout mutation of F. turriciilns, being 

 connected with that species by the stouter varieties of the same (F. 

 chinensisf). Sowerby says that the difference between this species 

 and F. turriculus lies "in the greater prominence of the plaits and whorls 

 and the deeper excavation of the suture" in the latter species. It 

 seems proper to call this species a lateral branch from the F. turriculus 

 stock, developed under conditions which enforced upon the shell a 

 greater degree of compactness and solidity during growth. 



Habitat: Unknown. 



FUSUS NOBILIS Reeve. 



1847. Fusus nobilis Reeve, Iconica, Fusus sp. 60. 



A magnificent specimen of this species occurs in the Haines col- 

 lection of the xAmerican JNluseum of Natural History. It is almost 

 identical with Reeve's figure 60, in shape and size. It is the turriculus 

 type but in a condensed form. Its ribbed stages agree completely with 

 Reeve's figure of F. reeveanus, to which the present species holds the 

 same relation as the large gerontic type previously described holds to 

 /•". turriculus. F. nobilis is an extremely accelerated type, intercalated 

 spirals appearing in the youngest whorls preserved (third or fourth). 

 There are about nine ribbed whorls of the reeveanus type. In the 

 seventh whorl tertiary spirals appear, which in the ninth become com- 

 pound, having divided into two or sometimes more. 



Locality: Philippines. 



FUSUS SPECTRUM Adams and Reeve. 



184S. fusus spectrum Adams and Reeve, Voyage Samarang. 



1848. Fusus spectrum Reeve, Iconica, pi. 18, sp. 68. 



No specimens of this species have been seen, but from the figure 

 given by Reeve it appears to be an accelerated species of the F. tur- 



