94 THE NAUTILUS. 



having examined some of them, and their development, the writer 

 is not prepared, as yet, to speak in a general way about them. 

 New Philadelphia, Ohio, Nov., 1895. 



NOTES AND NEWS. 



NEW RECORDS OF REVERSED AMERICAN HELICES. I have my- 

 self found three reversed Helices. First, reversed tlii/roides. This 

 specimen I sent to the late John G. Anthony for the Cambridge 

 Collection. Second, reversed muUiline.ala. This also I sent to 

 Anthony. I now have another reversed thyroides in my collection. 

 I also know of a third one, collected near Cincinnati, by the late 

 Mr. Stannage, and also of a reversed mitchelliana collected by Prof. 

 F. W. Bryant near Cincianati. 



This makes a list of six reversed specimens of Mesodun, which I 

 have seen. Dr. Lewis had a reversed albolulris in his collection. 

 This does not indicate that Patnla has much the start. 



A. G. WETHERBY, Magnetic City, N. C. 



VlTRINA LIMPIDA IN WESTERN PENNSYLVANIA. The last time 



I saw you I promised to send you some living Vitrina HmpidaGld. 

 if my " colony" had not died out, so I send you a dozen and trust 

 they will reach you in good shape. 



Last year I only found 12 alive, so feared the " colony " had died 

 out, and, up to to-day, had not found a single specimen this year. 

 It has been exceedingly dry this season, the deficit in rain fall being 

 iii'urfy 11 inches up to November 1, but yesterday we had a steady, 

 soaking rain ; so to-day I started out for Vitrina and collected 95 

 in two hours, so you see, the " colony " is still flourishing in spite of 

 the drought, and burning off the "drift" under which they lived. 

 I think I told you that this " colony" came down the river in the 

 flood of February, 1891, as that was the time the drift lodged in the 

 hollow where they are found, and the Signal Service records show 

 that the '91 flood came from the headwaters of the Allegheny. This 

 is a good example of " dispersal by water," and one that has prac- 

 tically been proved. 



To-day was cold and raw, with slight snow-spits (Signal Service 

 record for November 10 show maximum temperature 39 F., mini- 

 mum 36 F.), so V. limpida has the same habits as its European 



