THE NAUTILUS. 91 



Structure identical with that of F. subrotunda. Anal opening sep- 

 arated from the supra-anal by a very short mantle connection, with 

 fine but distinct crenulations. Branchial with papillae. Posterior 

 margins of palpi connected for about one-third to one-half of their 

 length. 



Gills short and wide, the inner wider. Inner lamina of inner gill 

 free from abdominal sac, except at its anterior end. In the female, 

 all four gills have marsupial structure. None of the females was 

 gravid. 



Color of soft parts generally of the orange type, with foot, ad- 

 ductors and mantle margin often deep orange, rarely paler. In a 

 few specimens the soft warts were pale brown to whitish. Gonads in 

 most females intensely red (crimson) ; also in the males more or less 

 red or pink, but in the latter they were in some cases brownish- 

 gray- 



(To be continued.} 



SPRING COLLECTING IN SOUTHWEST VIRGINIA. 



BY CALVIN GOODRICH. 



[Concluded from page 82.~\ 



Some additions were made the next morning to Dr. Ortmann's 

 Naiad list of the Clinch a mile and a half below St. Paul : 

 Micromya cselata (Conrad), Eurynia recta (Lam.), and Nephronaias 

 ligamentina gibba (Simpson), closely allied to N. perdix (Lea), lo 

 at this point was seemingly all provided with tubercules. The shells 

 were to be found on the larger stones on the up-stream side, or under 

 an up-stream shelf, in the swifter water. An occasional one ap- 

 peared in relatively quiet water. The white disintegrating shells of 

 Campeloma decisum (Say), were common on the flood plain here. 



Our next collecting spot was in the South Fork of the Powell 

 river at Big Stone Gap, Wise Co., Va. The Doctor tackled the 

 stream at once, while I climbed the big ridge, which hangs over it, 

 in search of land material. The ridge proved to be entirely of sand- 

 stone and was as barren of molluscan life as the ordinary town lot> 

 no bones at all being seen and only two living individuals, juvenile 

 Polygyrae. Joining Dr. Ortmann after a couple of hours, I found 



