96 THE NAUTILUS. 



NOTES. 



ACHATIXA GRACILIOR Boettger This fine species described 

 from Camroon in the Nachrichtsblatt for this year, p. 167, pi. 7, f. 

 1, 2 (issued about Nov. 1, 1905), seems to be quite identical with 

 A. papyracea var. adelince Pils., Manual of Conchology, part 67, p. 

 118, pi. 20, f. 4, 5 (issued March 1, 1905). 



PHYSA RHOMBOIDEA. The name Physa rhomboidea was originally 

 applied by Meek and Hayclen (Proc. Acad. Nat. Sci. Phila., 1856) 

 to a Cretaceous fossil. Hence P. rltymboidea Crandall becomes a 

 homonym. It does not seem necessary to propose anew name since 

 Miss Springer's recent paper in Proc. Acad. Nat. Sci. Phila., (1902 

 p. 513) indicates that it is not essentially different from P. burner osa. 



T. D. A. COCKERELL. 



NOVEMBER SNAILS. At noon of Nov. 21, I was out for an hour, 

 to look after some mollusks, along a dry, gravelly bank exposed to the 

 sun nearly all day, during summer. A few trees, shrubs and herbage 

 were shading part of it. We had had severe frosts night after night, 

 and the soil was usually frozen till late in the forenoon. Under 

 boards, bricks and stones, the following mollusks were found ap- 

 parently none the worse from being frozen in most of the time. 



Agriolimax campestris Say, several hundred specimens, some of 

 them only half grown, others young, only a few millimeters long ; 

 newly laid ova were found, and one containing a nearly mature 

 embryo. Two specimens were seen in the characteristic attitude 

 ready for copulation. Freshly deposited ova have also been found ii? 

 the earliest spring days, some years ago. 



Zonitoides arboreus Say, common. 



Patula striatella Anth., common, more at shaded places. Vallonia 

 al>out 40 specimens, 33 of which were costata Mull., 5 pulchella Mull, 

 and 2 excentrica St. In general V. pulchella, and also excentrica are 

 found in comparatively larger numbers, or exclusively in more shaded 

 and damp localities. 



Bifidaria armifera Say, several under a tree; but often it is found 

 at exposed dry localities. 



Succinea avara Say, common. 



Succinea aetusa Lea, one specimen, nearly full grown, another 

 rather small. V. STERKI. 



