THE NAUTILUS. 71 



always collected Lampsilis luteolus, Sphatrium simile, S. stamineum, 

 S. fabale, Pisidinm abditium, P. bakeri (= P. amnicum Miill., teste 

 Sterki), Limncea palustris, L. desidiosa, Planorbis campanulatiis, P. 

 trivolvis, P. bicarinatus, P. deflectus, P. parvus, Ancylus parallelus, 

 Pliysa keteroslropha, Pleurocera subulare, Byihinia tentaculata, Amni. 

 cola limosa, A. lustrica, A. obtusa, A. cincinnatiensis, Gillia altilis, 

 Somatogyms subglobosus, Yalvata sincera, V- tricarinata and V- 

 obtusa. Pisidinm bakeri Pilsbry lias been found in great abundance 

 at Summerville, where specimens nearly a quarter of an inch in 

 length have been collected. Valrata obtusa Drap. was found at both 

 Charlotte and Summerville in 1899 fully as abundant as Y. sincera I 

 This species was reported from this country for the first time in 1897, 

 when but a few specimens were obtained. In the interval between 

 that time and August, 1899, it had increased a hundred fold. It is 

 probable that many introduced species will be found in our Great. 

 Lakes if the shore debris be carefully searched. 



The localities mentioned above have yielded altogether 150 species, 

 many of which may be found heir in as great abundance and perfec- 

 tion as at any locality in the northern part of the United States. 



NOTES AND NEWS. 



A New American Slug — Dr. J. F. Babor has described an in- 

 teresting new form, Ariolimax steindachnori, from a specimen col- 

 lected by F. Steindachner on Puget Sound, in 1874. ' It is large, 

 length <S0 mm., breadth 1'.', height 21 mm., about the size of Ario- 

 limax columbianus, and differs externally from that species in having 

 the well developed tail pore an open slit, as in Hesperarion, not 

 plugged as in the other Ariolimaces. The teeth are as in A. califor 

 nicus. The genitalia lie free, the ovotestis anterior, at the stomach. 

 The penis contains a large papilla but is otherwise hollow, much as 

 in Hesperarion. There is no appendiculum, and no '• retensor " 

 muscle, but a vaginal retractor is developed. 



The species is clearly intermediate to some extent between Hes- 

 perarion and Ariolimax, and may indicate that the former group 



1 Annaien des K. K. Xaturhist. Hot'museums, XV, 1900, p. 95. 



