6o CHRISTY : ON MOLLUSCA COLLECTED IN SWITZERLAND. 



beside the roadj notably Clausilia biplicata and C. dubia in 

 plenty, with abundance of H. rupesiris and some of what I 

 presume were Pupa avenacea. On the 8th we drove from 

 Dissentis through the Lukmannier Pass, which somewhat 

 resembles the Via Mala but is far less grand, I counted no 

 less than ten tunnels (some of them of fair length) through 

 which the road passed in the course of a mile. Here I met 

 with Clausilia plicatula but not in large numbers. Several 

 days later, after having been snowed up at Zermatt and only 

 escaping with difficulty, we arrived at Geneva, in which neigh- 

 bourhood, among other species, Clausilia parvula seemed 

 common on walls. I met with the same commonly at Lausanne 

 and also at Lucerne, where in the " Gletscher-Garten " I found 

 it on moist rocks with C biplicata and C. dubia mixed. From 

 Ouchy we of course went to visit the Castle of Chillon. Pupa 

 avenacea and Clausilia plicatula were very abundant on the 

 walls of the castle with a few Helix lapicida, while from Lucerne 

 we of course went up the Rigi. Here at a height of about 

 6000 feet I found plenty of H. arbustorum^ most of the speci- 

 mens having very thin shells, and also a good number of 

 IT. villosa. 



CIRCE VERSUS GOULDIA. 



By PROF. W. H. BALL, 



Smithsonian Institution, Washington, D.C. 



No. 10 of vol. iii. is at hand with the observations of my 

 friend Mr. Boog Watson on the subject of " Circe versus 

 Gouldia." The old parable of the Gold and Silver Shield is 

 not necessary to teach us that there are different ways of looking 

 at a fact or collection of facts. It seems to me that a little 

 more illumination on this subject will do no harm, and I would 

 beg space for it in your columns. Part of the difference of our 

 points of view consists in the different ways in which my friend 

 Watson and I regard the subject of nomenclature. This differ- 

 ence I cannot hope to reconcile and therefore on that side we 



J.C, iv., April, 1883 



