24 THE NAUTILUS. 



fers in being greenish, while strodeanus is dead black ; its beak cav- 

 ties are deeper, and its teeth are much longer, stouter and more 

 erect. 



From U. curtus, to which it is allied, it differs, lacking the pro- 

 nounced swelling before. 



Many of these shells show a constriction like the U. constrictus of 

 Conrad, and it may be that this is a sexual mark. 



Figs. 1 and 2 represent the normal shape, Fig. 3 the constricted 

 form. 



Types in the Academy of Natural Sciences, cotypes in my own 

 collection, in the National Museum, and specimens of the same lot 

 are in many other cabinets as '■'• castaneus." 



NOTES. 



Carychium minimum Mull.: It may interest students of geo- 

 graphical distribution, to learn that a thriving colony of Carychium 

 minimum Mull., has been found in a greenhouse at Quincy, Mass. 

 I have observed this species at intervals for nearly a year, and as it 

 is becoming more plentiful, there seems to be a reasonable chance 

 that it may escape to the surrounding country. Considering its 

 natural habitat, there is a possibility of its becoming accustomed to 

 our climute. W. F. Clapp. 



Opeas clavumnum kyotoensk Pils.: I have found a few speci- 

 mens of Opeas clavalinum kyotoense Pils., in a greenhouse at Cam- 

 bridge, Mass.j but only in the hottest house, although they are very 

 hardy if kept in a warm vivarium. Ti;ey will not survive a slight 

 drop in temperature. Therefore there seems little likelihood of this 

 species becoming a permanent addition to our northern fauna. Un- 

 like the majority of our North American pulmonates this species 

 does not appear to mind direct sunlight, but will leave the shade of 

 a protecting leaf, to spend an hour or two in crawling on the glass, 

 exposed to the rays of a bright midday sun. 



1 am indebted to Mr. George H. Clapp for the identification of 

 this species. He states that specimens have also been found by him 

 in Phipp's Conservatory, Pittsburgh, Pa., in 1901, and by Mr. 

 Bryant Walker in a '* Bigonia House " at Buffalo, N. Y. 



W. F. Clapp. 



