INSTITUTE OF SCIENCE, PHILADELPHIA. 263 



cassis. It has never been figured, and the description is insufficient to identify 

 the species. After publishing my description of C. globosiun, Mr. Aldrich sug- 

 gested that this species of Conrad's was stilj unaccounted for, and, on search- 

 ing the collection at Philadelphia, a shell was found under Conrad's name 

 which proves to be identical with the globosiuii. Whether the ineffective de- 

 scription remaining unrepresented by a figure for more than half a century is 

 entitled to precedence is doubtful, and I am contented to leave the question to 

 the judgment of paleontologists. 



Cassis (Phalium) Aldrichi Dall. 

 Plate 21, figure 2. 

 C. {P.) Aldrichi Dal!, op. cit., p. 162. 



A figure of this interesting species is now furnished. 



Family CYPR/EID^ (supplementary). 



Genus TRIVIA Gray. 



Trivia pediculus Linn^. 



In Part I., p. i68, the existence of this shell in the Miocene was queried, 



but since that time Mr. Johnson has collected undoubted specimens of this 



species from Mrs. Guion's marl-bed in the Newer Miocene of the Cape Fear 



River, North Carolina. 



Family .STROMBID^ (supplementary). 



Genus STROMBUS Linn6. 



Strombus chipolanus Dall. 



Plate 13, figures i, 3. 



.S. chipolanus Dall, Part I. p. 176, pi. 4, fig. i, 1890. 



This species was only figured from an imperfect fragment taken from the 

 silex beds, in Part I., and it has been thought best to illustrate the more per- 

 fect and complete specimen from the Chipola beds upon which the descrip- 

 tion was based. This shell attained a maximum length of 65 mm. 



Family TRIFORIDvE. 



Genus TRIFORIS Deshayes. 



Section Mastonia Hinds. 



Triforis perversa Linn^, var. nigrocincta Adams. 



Cerithiuni nigrocincium C. B. Ads , Bost. Journ. Nat. Hist. ii. p. 2S6, pi. iv. fig. 11, 1839. 

 T. perversa var. -nigrocincta Dall, Rep. Blake Gastr., p. 243, 1889. 



Pliocene of the Waccamaw beds, South Carolina, the Shell Creek and 

 the Caloosahatchie beds in Florida ; living from Massachusetts southward to 

 the Antilles in shallow water. 



I have already discussed the relations of the American to the European 



