144 THE NAUTILUS. 



3. The intergradation of supposed specific distinctions in the case 

 of all these described species points to a most chaotic condition in 

 the group, and suggests the need of a reclassification of the group 

 based on broader knowledge and far more extensive material. 



NOTES. 



MIDWAY-PERNAMBUCO FAUNA : On several occasions I have 

 called attention to the fact that Dr. White's " Cretaceous " fauna 

 published in the Archives do Museu Nacional do Rio de Janeiro, 

 vol. vii, is a mixture of Midway Eocene and true Cretaceous forms 

 (See Bull. Am. Pal. vol. i, p. 154-157.) Especially have I main- 

 tained that the Maria Farinha beds are Eocene. That in eastern 

 Brazil there may be both Cretaceous and Eocene, alike in lilhologic 

 appearance and general attitude may well be allowed. But owing to 

 the profound hiatus in our Southern States between the two terranes 

 (though lithologically sometimes similar and formerly supposed to 

 intergrade, Bull. 43, U. S. G. S.) there seemed good reason for 

 supposing that the east Brazilian fossils represent two distinct hori- 

 zons whose remains had not been carefully discriminated or labeled 

 in the field. 



In looking over a box of fossils carefully labeled as to exact 

 horizon from eastern Venezuela a few days ago, I found the typical 

 Midway fauna with the Maria Farinha representatives without the 

 slightest indication of any Cretaceous forms. 



The point therefore which I wish to make is this, that, if the 

 Midway as far south as Venezuela shows no trace of Cretaceous 

 forms, it is fair to presume that even somewhat farther south in 

 Brazil the Midway and Cretaceous are still entirely distinct. 



Again, this shows quite clearly too that, as we had often maintained, 

 the Midwayan is a tropical, or warm-water fauna, though occurring 

 as far north as west Tennessee. G. D. HARRIS. 



BERMUDA SHELLS. By E. G. Vanatta (Proc. A. N. S., Phila., 

 1910). Recent specimens of Kaliella turbinata, Vertigo numellala 

 and marki, and Carychium bermudense are recorded. These forms 

 were described as fossils in the aeolian limestone. A fresh-water 

 fauna was formerly supposed not to exist in Bermuda, but the follow- 

 ing new species are now described and figured . Physa caliban, 

 Planorbis uliginosus, P. imus, Ancylus bermudensis, Pisidium voluta- 

 bundum and Paludestrina bermudensis. Mr. Vanatta also found 

 fresh-water diatoms. Several other species new to Bermuda are re- 

 corded. 



