Pulmonifera of Maine. 33 



" Ground frozen and snow, April 5th, 1858. Found Bulimus harpa in their 

 usual abundant quantities. They appeared to be in their winter quarters, 

 having the epiphragm formed, some being glued to leaves; they were but just 

 below the surface, or secreted in acorn cups or nut shells, and I should 

 think from this that they were more hardy than Bulimus lubricus, of Avhich I 

 found only two specimens, and these were at greater depths and attached to 

 roots of weeds." 



It is equally proof against heat, for I have found it during 

 severe droughts, adhering to the underside of leaves which were 

 dried to a crisp, while all other species had sought shelter deep 

 in the damp mould. 



The following is a description of mine, which is already pub- 

 lished in Binney's " Supplement" to his father's work. 



" Animal small compared to the size of the shell, body and head slate color ; 

 superior tentacles darker, short, thick, bulbous ; eyes large, distinct ; foot but 

 two thirds length of shell, whitish. 



" In motion they are exceedingly graceful, at times poising their beautiful 

 shell high above their body, and twirling it around, not unlike the Physa, again 

 hugging their pretty harp close to their body, the shell when in this last posi" 

 tion continually oscillates as if the animal could not balance it; it rarely ever 

 moves in a straight line, but is always turning and whisking about, and this is 

 done at times very quickly and abruptly." 



This description I drew from the species in its place of abode, 

 without the aid of any magnifying power. The foot is quite as long 

 as the shell, and not two thirds the length as stated in the above 

 description. The shell is very light and elastic ; the costulations, 

 or ribs are thin, colorless laminae, slightly inclined backward; 

 the incremental lines are coarse and irregular; no longitudinal 

 lines were visible, even when highly magnified ; the body, disk, 

 and mantle, are marked with white dots, the edge of the mantle 

 is of the same color as the head and tentacles. The disk is 

 rounded posteriorly, broad and truncated anteriorly, the lateral 

 borders of which are deeply crenulated. The head is separate 

 from the disk as in the Pupadae, bearing two minutely crenulated 

 lappets, which hang down on either side of the mouth like a visor, 

 reminding one of the oblique folds on the head of Glandina trun- 

 cata, which we believe to be homologous to them. A longitudinal 

 furrow extends from the mouth downward. The body is so 

 translucent that when extended the ganglionic centres can be 

 plainly seen. 



JOURNAL p. S. N. H. 8 MARCH, 1864. 



