Varn N@orilwus. 
Vot. X. MARCH, 1897. No. 11 
ILLUSTRATIONS OF NEW UNIONIDE. 
Plate I, figs. 1.2, 5, Unio superiorensis Marsh. For description 
see Nauritus for January, 1897, p. 103. 
Figs. 3, 4, Unio Askewi Marsh. Description in Navrixus for 
December 1896, p. 91. 
Figures are natural size. The specimens illustrated have been 
placed by Mr. Marsh in the Museum of the Academy of Natural, 
- Sciences of Philadelphia. 
LIST OF SPECIES COLLECTED AT BAHIA, BRAZIL, BY DR. H. VON 
IHERING. 
IDENTIFIED BY W. H. DALL. 
The following species of shells were collected under the direction 
of Dr. H. von Ihering at Bahia, except when otherwise stated, and 
were forwarded to the National Museum for identification. This 
list includes only the doubtful species which could not be named 
with the literature available at the San Paulo Museum. Dr. von 
Thering will eventually publish a complete list of the Brazilian coast 
fauna; meanwhile these identifications may be useful for reference. 
The remarkable thing about the collection, made 500 miles south of 
Cape San Roque and 2,200 miles beyond the mouth of the Amazon, 
is its typically Antillean character, resembling the fauna of the 
Bahamas. This indicates (if there be no uncertainty as to the 
