THE NAUTILUS. 43 



deeply impressed and smooth, posterior cicatrices confluent ; shell 

 cavity moderate and uniform, beak cavity slight ; nacre dead white, 

 purple or pink, or a combination of these shades. 



Diameter 1.25, length 2.00, width 3.75 inches. 



Habitat : Spanish Creek, Okefenokee Swamp, Charlton Co., Ga. 



Type lot in National Museum. 



Remarks : This is one of the most variable forms we have ever 

 handled. It belongs to the forbe&ianus, vestitus, Moussomanus group, 

 with which we have tried hard to place it specifically. Out of several 

 hundred specimens, none could be found that were typical of any of 

 the above-named species. It is the connecting link between the 

 beautiful hartwrightii of South Florida, and the group above named, 

 of Georgia. It is usually rayless, though some of the younger forms 

 are densely covered with broad green rays, and it becomes very 

 rough and ponderous in old age. In view of the many phases it 

 assumes, it has been thought best to select no one individual as a 

 type, but to make the description broad enough to embrace all of its 

 variations, and to deposit examples of all with the National Museum. 



Addendum : July Nautilus, p. 31, first line of description of 

 Unio daniehii insert the words "yet black" after "solid." 

 ( To be continued.) 



ANNOTATED LIST OF LAND AND FRESH-WATER SHELLS RECENTLY 

 COLLECTED IN THE VICINITY OF MIAMI, FLORIDA. 



BY SAMUEL N. R1IOADS. 



The collection forming the subject of the following paper, was 

 secured during a visit to Miami, covering a period of about four 

 weeks, from January 12, 18'J9. The size and completeness of the 

 collection is largely due to the field assistance of my kind friends, 

 Messrs. Stevenson and Dickinson, of Miami, the former of whom has 

 searched out the shells of South Florida for the past two years with 

 commendable perseverance. 



The classification of land species follows that of Pilsbry and John- 

 son's catalogue. The identifications were all made by Prof. II. A. 

 Pilsbry, of the Academy of Natural Sciences of Philadelphia, where 

 the collection is now located. 



